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<div class="header">
<div class="subTitle">
javax.swing
</div>
<h2 class="title" title="Class JLayer">Class JLayer&lt;V extends <a href="../../java/awt/Component.html" title="class in java.awt">Component</a>&gt;</h2>
</div><div class="contentContainer">
<ul class="inheritance">
<li><a href="../../java/lang/Object.html" title="class in java.lang">java.lang.Object</a></li>
<li>
<ul class="inheritance">
<li><a href="../../java/awt/Component.html" title="class in java.awt">java.awt.Component</a></li>
<li>
<ul class="inheritance">
<li><a href="../../java/awt/Container.html" title="class in java.awt">java.awt.Container</a></li>
<li>
<ul class="inheritance">
<li><a href="../../javax/swing/JComponent.html" title="class in javax.swing">javax.swing.JComponent</a></li>
<li>
<ul class="inheritance">
<li>javax.swing.JLayer&lt;V&gt;</li>
</ul> </li>
</ul> </li>
</ul> </li>
</ul> </li>
</ul>
<div class="description">
<ul class="blockList">
<li class="blockList">
<dl>
<dt>
<span class="paramLabel">参数类型</span>
</dt>
<dd>
<code>V</code> -
<code>JLayer</code>的视图组件的类型
</dd>
</dl>
<dl>
<dt>
All Implemented Interfaces:
</dt>
<dd>
<span><a href="../../java/awt/image/ImageObserver.html" title="java.awt.image中的接口">ImageObserver</a> ， <a href="../../java/awt/MenuContainer.html" title="java.awt中的接口">MenuContainer</a> ， <a href="../../java/beans/PropertyChangeListener.html" title="java.beans中的接口">PropertyChangeListener</a> ， <a href="../../java/io/Serializable.html" title="java.io中的接口">Serializable</a> ， <a href="../../java/util/EventListener.html" title="java.util中的接口">EventListener</a> ， <a href="../../javax/accessibility/Accessible.html" title="javax.accessibility中的接口">Accessible</a> ， <a href="../../javax/swing/Scrollable.html" title="javax.swing中的接口">Scrollable</a></span>
</dd>
</dl>
<hr/> <br/> <pre>public final class <span class="typeNameLabel">JLayer&lt;V extends <a href="../../java/awt/Component.html" title="class in java.awt">Component</a>&gt;</span>
extends <a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a>
implements <a href="../../javax/swing/Scrollable.html" title="interface in javax.swing">Scrollable</a>, <a href="../../java/beans/PropertyChangeListener.html" title="interface in java.beans">PropertyChangeListener</a>, <a href="../../javax/accessibility/Accessible.html" title="interface in javax.accessibility">Accessible</a></pre>
<div class="block">
<span><code>JLayer</code>是用于Swing组件的通用装饰器，可以实现各种先进的绘画效果，并且可以接收在其边框内生成的所有<code>AWTEvent</code>的通知。</span>
<p> <span><code>JLayer</code>将绘画和输入事件的处理委托给一个执行实际装饰的<a href="../../javax/swing/plaf/LayerUI.html" title="javax.swing.plaf中的类"><code>LayerUI</code></a>对象。</span> </p>
<p> <span>在风俗画在实施<code>LayerUI</code>为JLayer本身及其所有子组件和事件通知工作。</span> <span>该组合使您可以通过添加新的高级功能来丰富现有组件，例如临时锁定层次结构，复合组件的数据提示，增强的鼠标滚动等等。</span> </p>
<p> <span><code>JLayer</code>是一个很好的解决方案，如果您只需要对复合组件进行自定义绘画或从其子组件捕获输入事件。</span> </p>
<pre> <span>import javax.swing.*;
import javax.swing.plaf.LayerUI;
import java.awt.*;
public class JLayerSample {
private static JLayer&lt;JComponent&gt; createLayer() {
// This custom layerUI will fill the layer with translucent green
// and print out all mouseMotion events generated within its borders
LayerUI&lt;JComponent&gt; layerUI = new LayerUI&lt;JComponent&gt;() {
public void paint(Graphics g, JComponent c) {
// paint the layer as is
super.paint(g, c);
// fill it with the translucent green
g.setColor(new Color(0, 128, 0, 128));
g.fillRect(0, 0, c.getWidth(), c.getHeight());
}
public void installUI(JComponent c) {
super.installUI(c);
// enable mouse motion events for the layer's subcomponents
((JLayer) c).setLayerEventMask(AWTEvent.MOUSE_MOTION_EVENT_MASK);
}
public void uninstallUI(JComponent c) {
super.uninstallUI(c);
// reset the layer event mask
((JLayer) c).setLayerEventMask(0);
}
// overridden method which catches MouseMotion events
public void eventDispatched(AWTEvent e, JLayer&lt;? extends JComponent&gt; l) {
System.out.println("AWTEvent detected: " + e);
}
};
// create a component to be decorated with the layer
JPanel panel = new JPanel();
panel.add(new JButton("JButton"));
// create the layer for the panel using our custom layerUI
return new JLayer&lt;JComponent&gt;(panel, layerUI);
}
private static void createAndShowGUI() {
final JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// work with the layer as with any other Swing component
frame.add(createLayer());
frame.setSize(200, 200);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) throws Exception {
SwingUtilities.invokeAndWait(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}</span> </pre>
<span><b>注意：</b> <code>JLayer</code>不支持以下方法：</span>
<ul>
<li> <span><a href="../../java/awt/Container.html#add-java.awt.Component-"><code>Container.add(java.awt.Component)</code></a></span> </li>
<li> <span><a href="../../java/awt/Container.html#add-java.lang.String-java.awt.Component-"><code>Container.add(String, java.awt.Component)</code></a></span> </li>
<li> <span><a href="../../java/awt/Container.html#add-java.awt.Component-int-"><code>Container.add(java.awt.Component, int)</code></a></span> </li>
<li> <span><a href="../../java/awt/Container.html#add-java.awt.Component-java.lang.Object-"><code>Container.add(java.awt.Component, Object)</code></a></span> </li>
<li> <span><a href="../../java/awt/Container.html#add-java.awt.Component-java.lang.Object-int-"><code>Container.add(java.awt.Component, Object, int)</code></a></span> </li>
</ul>
<span>使用任何一个将导致<code>UnsupportedOperationException</code>被抛出，添加一个组件到<code>JLayer</code>使用<a href="../../javax/swing/JLayer.html#setView-V-"><code>setView(Component)</code></a>或<a href="../../javax/swing/JLayer.html#setGlassPane-javax.swing.JPanel-"><code>setGlassPane(JPanel)</code></a> 。</span>
</div>
<dl>
<dt>
<span class="simpleTagLabel">从以下版本开始：</span>
</dt>
<dd>
1.7
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<span><a href="../../javax/swing/JLayer.html#JLayer-V-"><code>JLayer(Component)</code></a> ， <a href="../../javax/swing/JLayer.html#setView-V-"><code>setView(Component)</code></a> ， <a href="../../javax/swing/JLayer.html#getView--"><code>getView()</code></a> ， <a href="../../javax/swing/plaf/LayerUI.html" title="javax.swing.plaf中的类"><code>LayerUI</code></a> ， <a href="../../javax/swing/JLayer.html#JLayer-V-javax.swing.plaf.LayerUI-"><code>JLayer(Component, LayerUI)</code></a> ， <a href="../../javax/swing/JLayer.html#setUI-javax.swing.plaf.LayerUI-"><code>setUI(javax.swing.plaf.LayerUI)</code></a> ， <a href="../../javax/swing/JLayer.html#getUI--"><code>getUI()</code></a></span>
</dd>
</dl> </li>
</ul>
</div>
<div class="summary">
<ul class="blockList">
<li class="blockList">
<!-- ======== NESTED CLASS SUMMARY ======== -->
<ul class="blockList">
<li class="blockList"><a name="nested.class.summary">
<!-- --> </a> <h3>Nested Class Summary</h3>
<ul class="blockList">
<li class="blockList"><a name="nested.classes.inherited.from.class.javax.swing.JComponent">
<!-- --> </a> <h3>Nested classes/interfaces inherited from class javax.swing.<a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a></h3> <code><a href="../../javax/swing/JComponent.AccessibleJComponent.html" title="class in javax.swing">JComponent.AccessibleJComponent</a></code></li>
</ul>
<ul class="blockList">
<li class="blockList"><a name="nested.classes.inherited.from.class.java.awt.Container">
<!-- --> </a> <h3>Nested classes/interfaces inherited from class java.awt.<a href="../../java/awt/Container.html" title="class in java.awt">Container</a></h3> <code><a href="../../java/awt/Container.AccessibleAWTContainer.html" title="class in java.awt">Container.AccessibleAWTContainer</a></code></li>
</ul>
<ul class="blockList">
<li class="blockList"><a name="nested.classes.inherited.from.class.java.awt.Component">
<!-- --> </a> <h3>Nested classes/interfaces inherited from class java.awt.<a href="../../java/awt/Component.html" title="class in java.awt">Component</a></h3> <code><a href="../../java/awt/Component.AccessibleAWTComponent.html" title="class in java.awt">Component.AccessibleAWTComponent</a>, <a href="../../java/awt/Component.BaselineResizeBehavior.html" title="enum in java.awt">Component.BaselineResizeBehavior</a>, <a href="../../java/awt/Component.BltBufferStrategy.html" title="class in java.awt">Component.BltBufferStrategy</a>, <a href="../../java/awt/Component.FlipBufferStrategy.html" title="class in java.awt">Component.FlipBufferStrategy</a></code></li>
</ul> </li>
</ul>
<!-- =========== FIELD SUMMARY =========== -->
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<li class="blockList"><a name="field.summary">
<!-- --> </a> <h3>Field Summary</h3>
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<li class="blockList"><a name="fields.inherited.from.class.javax.swing.JComponent">
<!-- --> </a> <h3>Fields inherited from class javax.swing.<a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a></h3> <code><a href="../../javax/swing/JComponent.html#listenerList">listenerList</a>, <a href="../../javax/swing/JComponent.html#TOOL_TIP_TEXT_KEY">TOOL_TIP_TEXT_KEY</a>, <a href="../../javax/swing/JComponent.html#ui">ui</a>, <a href="../../javax/swing/JComponent.html#UNDEFINED_CONDITION">UNDEFINED_CONDITION</a>, <a href="../../javax/swing/JComponent.html#WHEN_ANCESTOR_OF_FOCUSED_COMPONENT">WHEN_ANCESTOR_OF_FOCUSED_COMPONENT</a>, <a href="../../javax/swing/JComponent.html#WHEN_FOCUSED">WHEN_FOCUSED</a>, <a href="../../javax/swing/JComponent.html#WHEN_IN_FOCUSED_WINDOW">WHEN_IN_FOCUSED_WINDOW</a></code></li>
</ul>
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<!-- --> </a> <h3>Fields inherited from class java.awt.<a href="../../java/awt/Component.html" title="class in java.awt">Component</a></h3> <code><a href="../../java/awt/Component.html#accessibleContext">accessibleContext</a>, <a href="../../java/awt/Component.html#BOTTOM_ALIGNMENT">BOTTOM_ALIGNMENT</a>, <a href="../../java/awt/Component.html#CENTER_ALIGNMENT">CENTER_ALIGNMENT</a>, <a href="../../java/awt/Component.html#LEFT_ALIGNMENT">LEFT_ALIGNMENT</a>, <a href="../../java/awt/Component.html#RIGHT_ALIGNMENT">RIGHT_ALIGNMENT</a>, <a href="../../java/awt/Component.html#TOP_ALIGNMENT">TOP_ALIGNMENT</a></code></li>
</ul>
<ul class="blockList">
<li class="blockList"><a name="fields.inherited.from.class.java.awt.image.ImageObserver">
<!-- --> </a> <h3>Fields inherited from interface java.awt.image.<a href="../../java/awt/image/ImageObserver.html" title="interface in java.awt.image">ImageObserver</a></h3> <code><a href="../../java/awt/image/ImageObserver.html#ABORT">ABORT</a>, <a href="../../java/awt/image/ImageObserver.html#ALLBITS">ALLBITS</a>, <a href="../../java/awt/image/ImageObserver.html#ERROR">ERROR</a>, <a href="../../java/awt/image/ImageObserver.html#FRAMEBITS">FRAMEBITS</a>, <a href="../../java/awt/image/ImageObserver.html#HEIGHT">HEIGHT</a>, <a href="../../java/awt/image/ImageObserver.html#PROPERTIES">PROPERTIES</a>, <a href="../../java/awt/image/ImageObserver.html#SOMEBITS">SOMEBITS</a>, <a href="../../java/awt/image/ImageObserver.html#WIDTH">WIDTH</a></code></li>
</ul> </li>
</ul>
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
<ul class="blockList">
<li class="blockList"><a name="constructor.summary">
<!-- --> </a> <h3>构造方法摘要</h3>
<table border="0" cellpadding="3" cellspacing="0" class="memberSummary" summary="Constructor Summary table, listing constructors, and an explanation">
<caption>
<span>构造方法</span>
<span class="tabEnd"> </span>
</caption>
<tbody>
<tr>
<th class="colOne" scope="col">Constructor and Description</th>
</tr>
<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#JLayer--">JLayer</a></span>()</code>
<div class="block">
<span>创建一个新的<code>JLayer</code>对象与一个<code>null</code>视图组件和默认<a href="../../javax/swing/plaf/LayerUI.html" title="javax.swing.plaf中的类"><code>LayerUI</code></a> 。</span>
</div> </td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#JLayer-V-">JLayer</a></span>(<a href="../../javax/swing/JLayer.html" title="type parameter in JLayer">V</a> view)</code>
<div class="block">
<span>创建一个新的<code>JLayer</code>对象，默认值为<a href="../../javax/swing/plaf/LayerUI.html" title="javax.swing.plaf中的类"><code>LayerUI</code></a> 。</span>
</div> </td>
</tr>
<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#JLayer-V-javax.swing.plaf.LayerUI-">JLayer</a></span>(<a href="../../javax/swing/JLayer.html" title="type parameter in JLayer">V</a> view, <a href="../../javax/swing/plaf/LayerUI.html" title="class in javax.swing.plaf">LayerUI</a>&lt;<a href="../../javax/swing/JLayer.html" title="type parameter in JLayer">V</a>&gt; ui)</code>
<div class="block">
<span>创建一个新的<code>JLayer</code>具有指定视图组件和对象<a href="../../javax/swing/plaf/LayerUI.html" title="javax.swing.plaf中的类"><code>LayerUI</code></a>对象。</span>
</div> </td>
</tr>
</tbody>
</table> </li>
</ul>
<!-- ========== METHOD SUMMARY =========== -->
<ul class="blockList">
<li class="blockList"><a name="method.summary">
<!-- --> </a> <h3>方法摘要</h3>
<table border="0" cellpadding="3" cellspacing="0" class="memberSummary" summary="Method Summary table, listing methods, and an explanation">
<caption>
<span class="activeTableTab" id="t0"><span>所有方法</span><span class="tabEnd"> </span></span>
<span class="tableTab" id="t2"><span><a href="javascript:show(2);">接口方法</a></span><span class="tabEnd"> </span></span>
<span class="tableTab" id="t4"><span><a href="javascript:show(8);">具体的方法</a></span><span class="tabEnd"> </span></span>
</caption>
<tbody>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr class="altColor" id="i0">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#addImpl-java.awt.Component-java.lang.Object-int-">addImpl</a></span>(<a href="../../java/awt/Component.html" title="class in java.awt">Component</a> comp, <a href="../../java/lang/Object.html" title="class in java.lang">Object</a> constraints, int index)</code>
<div class="block">
这种方法不支持
<code>JLayer</code> ，总是抛出
<code>UnsupportedOperationException</code>
</div> </td>
</tr>
<tr class="rowColor" id="i1">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#addNotify--">addNotify</a></span>()</code>
<div class="block">
通知此组件它现在有一个父组件。
</div> </td>
</tr>
<tr class="altColor" id="i2">
<td class="colFirst"><code><a href="../../javax/swing/JPanel.html" title="class in javax.swing">JPanel</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#createGlassPane--">createGlassPane</a></span>()</code>
<div class="block">
由构造函数调用方法创建一个默认值
<code>glassPane</code> 。
</div> </td>
</tr>
<tr class="rowColor" id="i3">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#doLayout--">doLayout</a></span>()</code>
<div class="block">
将其功能委托给
<a href="../../javax/swing/plaf/LayerUI.html#doLayout-javax.swing.JLayer-"><code>LayerUI.doLayout(JLayer)</code></a>方法，如果设置为
<code>LayerUI</code> 。
</div> </td>
</tr>
<tr class="altColor" id="i4">
<td class="colFirst"><code><a href="../../javax/accessibility/AccessibleContext.html" title="class in javax.accessibility">AccessibleContext</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#getAccessibleContext--">getAccessibleContext</a></span>()</code>
<div class="block">
获取与此
<code>JLayer</code> 。
</div> </td>
</tr>
<tr class="rowColor" id="i5">
<td class="colFirst"><code><a href="../../javax/swing/JPanel.html" title="class in javax.swing">JPanel</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#getGlassPane--">getGlassPane</a></span>()</code>
<div class="block">
返回
<code>JLayer</code>的glassPane组件或
<code>null</code> 。
</div> </td>
</tr>
<tr class="altColor" id="i6">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#getLayerEventMask--">getLayerEventMask</a></span>()</code>
<div class="block">
返回此
<code>JLayer</code>及其
<code>LayerUI</code>接收的事件掩码的位图。
</div> </td>
</tr>
<tr class="rowColor" id="i7">
<td class="colFirst"><code><a href="../../java/awt/Dimension.html" title="class in java.awt">Dimension</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#getPreferredScrollableViewportSize--">getPreferredScrollableViewportSize</a></span>()</code>
<div class="block">
返回视图组件的视口的首选大小。
</div> </td>
</tr>
<tr class="altColor" id="i8">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#getScrollableBlockIncrement-java.awt.Rectangle-int-int-">getScrollableBlockIncrement</a></span>(<a href="../../java/awt/Rectangle.html" title="class in java.awt">Rectangle</a> visibleRect, int orientation, int direction)</code>
<div class="block">
返回滚动增量，这是显示逻辑行或列的组件所必需的，以便根据方向的值完全暴露一个行或列的块。
</div> </td>
</tr>
<tr class="rowColor" id="i9">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#getScrollableTracksViewportHeight--">getScrollableTracksViewportHeight</a></span>()</code>
<div class="block">
返回
<code>false</code>以表示视口的高度不会确定图层的高度，除非图层的首选高度小于视口的高度。
</div> </td>
</tr>
<tr class="altColor" id="i10">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#getScrollableTracksViewportWidth--">getScrollableTracksViewportWidth</a></span>()</code>
<div class="block">
返回
<code>false</code> ，以指示视口的宽度不会确定图层的宽度，除非图层的首选宽度小于视口的宽度。
</div> </td>
</tr>
<tr class="rowColor" id="i11">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#getScrollableUnitIncrement-java.awt.Rectangle-int-int-">getScrollableUnitIncrement</a></span>(<a href="../../java/awt/Rectangle.html" title="class in java.awt">Rectangle</a> visibleRect, int orientation, int direction)</code>
<div class="block">
返回滚动增量，这是显示逻辑行或列的组件所必需的，以便根据方向的值完全暴露一个新行或列。
</div> </td>
</tr>
<tr class="altColor" id="i12">
<td class="colFirst"><code><a href="../../javax/swing/plaf/LayerUI.html" title="class in javax.swing.plaf">LayerUI</a>&lt;? super <a href="../../javax/swing/JLayer.html" title="type parameter in JLayer">V</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#getUI--">getUI</a></span>()</code>
<div class="block">
<span>返回<a href="../../javax/swing/plaf/LayerUI.html" title="javax.swing.plaf中的类"><code>LayerUI</code></a>此<code>JLayer</code> 。</span>
</div> </td>
</tr>
<tr class="rowColor" id="i13">
<td class="colFirst"><code><a href="../../javax/swing/JLayer.html" title="type parameter in JLayer">V</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#getView--">getView</a></span>()</code>
<div class="block">
返回
<code>JLayer</code>的视图组件或
<code>null</code> 。
</div> </td>
</tr>
<tr class="altColor" id="i14">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#isOptimizedDrawingEnabled--">isOptimizedDrawingEnabled</a></span>()</code>
<div class="block">
<code>JLayer</code>覆盖此方法的默认实现（在
<code>JComponent</code> ）以返回
<code>false</code> 。
</div> </td>
</tr>
<tr class="rowColor" id="i15">
<td class="colFirst"><code>protected boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#isPaintingOrigin--">isPaintingOrigin</a></span>()</code>
<div class="block">
始终返回
<code>true</code>以使绘画来源于
<code>JLayer</code> ，或其祖先之一。
</div> </td>
</tr>
<tr class="altColor" id="i16">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#paint-java.awt.Graphics-">paint</a></span>(<a href="../../java/awt/Graphics.html" title="class in java.awt">Graphics</a> g)</code>
<div class="block">
<span>将所有绘画<a href="../../javax/swing/plaf/LayerUI.html" title="javax.swing.plaf中的类">委托</a>给<a href="../../javax/swing/plaf/LayerUI.html" title="javax.swing.plaf中的类"><code>LayerUI</code></a>对象。</span>
</div> </td>
</tr>
<tr class="rowColor" id="i17">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#paintComponent-java.awt.Graphics-">paintComponent</a></span>(<a href="../../java/awt/Graphics.html" title="class in java.awt">Graphics</a> g)</code>
<div class="block">
这种方法是空的，因为所有的绘画都是由
<a href="../../javax/swing/JLayer.html#paint-java.awt.Graphics-"><code>paint(Graphics)</code></a>和
<a href="../../javax/swing/plaf/ComponentUI.html#update-java.awt.Graphics-javax.swing.JComponent-"><code>ComponentUI.update(Graphics, JComponent)</code></a>方法完成的
</div> </td>
</tr>
<tr class="altColor" id="i18">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#paintImmediately-int-int-int-int-">paintImmediately</a></span>(int x, int y, int w, int h)</code>
<div class="block">
将其功能委托给
<a href="../../javax/swing/plaf/LayerUI.html#paintImmediately-int-int-int-int-javax.swing.JLayer-"><code>LayerUI.paintImmediately(int, int, int, int, JLayer)</code></a>方法，如果设置为
<code>LayerUI</code> 。
</div> </td>
</tr>
<tr class="rowColor" id="i19">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#propertyChange-java.beans.PropertyChangeEvent-">propertyChange</a></span>(<a href="../../java/beans/PropertyChangeEvent.html" title="class in java.beans">PropertyChangeEvent</a> evt)</code>
<div class="block">
当绑定属性更改时，此方法将被调用。
</div> </td>
</tr>
<tr class="altColor" id="i20">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#remove-java.awt.Component-">remove</a></span>(<a href="../../java/awt/Component.html" title="class in java.awt">Component</a> comp)</code>
<div class="block">
从此容器中删除指定的组件。
</div> </td>
</tr>
<tr class="rowColor" id="i21">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#removeAll--">removeAll</a></span>()</code>
<div class="block">
从此容器中删除所有组件。
</div> </td>
</tr>
<tr class="altColor" id="i22">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#removeNotify--">removeNotify</a></span>()</code>
<div class="block">
通知此组件它不再具有父组件。
</div> </td>
</tr>
<tr class="rowColor" id="i23">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#setBorder-javax.swing.border.Border-">setBorder</a></span>(<a href="../../javax/swing/border/Border.html" title="interface in javax.swing.border">Border</a> border)</code>
<div class="block">
不支持非
<code>null</code>边框或非零插值，以防止此组件的几何变得足够复杂，以禁止
<code>LayerUI</code>类的
<code>LayerUI</code>类化。
</div> </td>
</tr>
<tr class="altColor" id="i24">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#setGlassPane-javax.swing.JPanel-">setGlassPane</a></span>(<a href="../../javax/swing/JPanel.html" title="class in javax.swing">JPanel</a> glassPane)</code>
<div class="block">
设置
<code>JLayer</code>的glassPane组件，可以是
<code>null</code> 。
</div> </td>
</tr>
<tr class="rowColor" id="i25">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#setLayerEventMask-long-">setLayerEventMask</a></span>(long layerEventMask)</code>
<div class="block">
启用来自JLayer的事件
<b>及其</b>由指定的事件掩码参数定义的
<b>所有</b>后代，以传递给
<a href="../../javax/swing/plaf/LayerUI.html#eventDispatched-java.awt.AWTEvent-javax.swing.JLayer-"><code>LayerUI.eventDispatched(AWTEvent, JLayer)</code></a>方法。
</div> </td>
</tr>
<tr class="altColor" id="i26">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#setLayout-java.awt.LayoutManager-">setLayout</a></span>(<a href="../../java/awt/LayoutManager.html" title="interface in java.awt">LayoutManager</a> mgr)</code>
<div class="block">
设置此容器的布局管理器。
</div> </td>
</tr>
<tr class="rowColor" id="i27">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#setUI-javax.swing.plaf.LayerUI-">setUI</a></span>(<a href="../../javax/swing/plaf/LayerUI.html" title="class in javax.swing.plaf">LayerUI</a>&lt;? super <a href="../../javax/swing/JLayer.html" title="type parameter in JLayer">V</a>&gt; ui)</code>
<div class="block">
<span>设置<a href="../../javax/swing/plaf/LayerUI.html" title="javax.swing.plaf中的类"><code>LayerUI</code></a>将执行绘图和接收<code>JLayer</code>输入事件。</span>
</div> </td>
</tr>
<tr class="altColor" id="i28">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#setView-V-">setView</a></span>(<a href="../../javax/swing/JLayer.html" title="type parameter in JLayer">V</a> view)</code>
<div class="block">
设置
<code>JLayer</code>的视图组件，可以是
<code>null</code> 。
</div> </td>
</tr>
<tr class="rowColor" id="i29">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/JLayer.html#updateUI--">updateUI</a></span>()</code>
<div class="block">
将其功能委托给
<a href="../../javax/swing/plaf/LayerUI.html#updateUI-javax.swing.JLayer-"><code>LayerUI.updateUI(JLayer)</code></a>方法，如果设置为
<code>LayerUI</code> 。
</div> </td>
</tr>
</tbody>
</table>
<ul class="blockList">
<li class="blockList"><a name="methods.inherited.from.class.javax.swing.JComponent">
<!-- --> </a> <h3>Methods inherited from class javax.swing.<a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a></h3> <code><a href="../../javax/swing/JComponent.html#addAncestorListener-javax.swing.event.AncestorListener-">addAncestorListener</a>, <a href="../../javax/swing/JComponent.html#addVetoableChangeListener-java.beans.VetoableChangeListener-">addVetoableChangeListener</a>, <a href="../../javax/swing/JComponent.html#computeVisibleRect-java.awt.Rectangle-">computeVisibleRect</a>, <a href="../../javax/swing/JComponent.html#contains-int-int-">contains</a>, <a href="../../javax/swing/JComponent.html#createToolTip--">createToolTip</a>, <a href="../../javax/swing/JComponent.html#disable--">disable</a>, <a href="../../javax/swing/JComponent.html#enable--">enable</a>, <a href="../../javax/swing/JComponent.html#firePropertyChange-java.lang.String-boolean-boolean-">firePropertyChange</a>, <a href="../../javax/swing/JComponent.html#firePropertyChange-java.lang.String-char-char-">firePropertyChange</a>, <a href="../../javax/swing/JComponent.html#firePropertyChange-java.lang.String-int-int-">firePropertyChange</a>, <a href="../../javax/swing/JComponent.html#fireVetoableChange-java.lang.String-java.lang.Object-java.lang.Object-">fireVetoableChange</a>, <a href="../../javax/swing/JComponent.html#getActionForKeyStroke-javax.swing.KeyStroke-">getActionForKeyStroke</a>, <a href="../../javax/swing/JComponent.html#getActionMap--">getActionMap</a>, <a href="../../javax/swing/JComponent.html#getAlignmentX--">getAlignmentX</a>, <a href="../../javax/swing/JComponent.html#getAlignmentY--">getAlignmentY</a>, <a href="../../javax/swing/JComponent.html#getAncestorListeners--">getAncestorListeners</a>, <a href="../../javax/swing/JComponent.html#getAutoscrolls--">getAutoscrolls</a>, <a href="../../javax/swing/JComponent.html#getBaseline-int-int-">getBaseline</a>, <a href="../../javax/swing/JComponent.html#getBaselineResizeBehavior--">getBaselineResizeBehavior</a>, <a href="../../javax/swing/JComponent.html#getBorder--">getBorder</a>, <a href="../../javax/swing/JComponent.html#getBounds-java.awt.Rectangle-">getBounds</a>, <a href="../../javax/swing/JComponent.html#getClientProperty-java.lang.Object-">getClientProperty</a>, <a href="../../javax/swing/JComponent.html#getComponentGraphics-java.awt.Graphics-">getComponentGraphics</a>, <a href="../../javax/swing/JComponent.html#getComponentPopupMenu--">getComponentPopupMenu</a>, <a href="../../javax/swing/JComponent.html#getConditionForKeyStroke-javax.swing.KeyStroke-">getConditionForKeyStroke</a>, <a href="../../javax/swing/JComponent.html#getDebugGraphicsOptions--">getDebugGraphicsOptions</a>, <a href="../../javax/swing/JComponent.html#getDefaultLocale--">getDefaultLocale</a>, <a href="../../javax/swing/JComponent.html#getFontMetrics-java.awt.Font-">getFontMetrics</a>, <a href="../../javax/swing/JComponent.html#getGraphics--">getGraphics</a>, <a href="../../javax/swing/JComponent.html#getHeight--">getHeight</a>, <a href="../../javax/swing/JComponent.html#getInheritsPopupMenu--">getInheritsPopupMenu</a>, <a href="../../javax/swing/JComponent.html#getInputMap--">getInputMap</a>, <a href="../../javax/swing/JComponent.html#getInputMap-int-">getInputMap</a>, <a href="../../javax/swing/JComponent.html#getInputVerifier--">getInputVerifier</a>, <a href="../../javax/swing/JComponent.html#getInsets--">getInsets</a>, <a href="../../javax/swing/JComponent.html#getInsets-java.awt.Insets-">getInsets</a>, <a href="../../javax/swing/JComponent.html#getListeners-java.lang.Class-">getListeners</a>, <a href="../../javax/swing/JComponent.html#getLocation-java.awt.Point-">getLocation</a>, <a href="../../javax/swing/JComponent.html#getMaximumSize--">getMaximumSize</a>, <a href="../../javax/swing/JComponent.html#getMinimumSize--">getMinimumSize</a>, <a href="../../javax/swing/JComponent.html#getNextFocusableComponent--">getNextFocusableComponent</a>, <a href="../../javax/swing/JComponent.html#getPopupLocation-java.awt.event.MouseEvent-">getPopupLocation</a>, <a href="../../javax/swing/JComponent.html#getPreferredSize--">getPreferredSize</a>, <a href="../../javax/swing/JComponent.html#getRegisteredKeyStrokes--">getRegisteredKeyStrokes</a>, <a href="../../javax/swing/JComponent.html#getRootPane--">getRootPane</a>, <a href="../../javax/swing/JComponent.html#getSize-java.awt.Dimension-">getSize</a>, <a href="../../javax/swing/JComponent.html#getToolTipLocation-java.awt.event.MouseEvent-">getToolTipLocation</a>, <a href="../../javax/swing/JComponent.html#getToolTipText--">getToolTipText</a>, <a href="../../javax/swing/JComponent.html#getToolTipText-java.awt.event.MouseEvent-">getToolTipText</a>, <a href="../../javax/swing/JComponent.html#getTopLevelAncestor--">getTopLevelAncestor</a>, <a href="../../javax/swing/JComponent.html#getTransferHandler--">getTransferHandler</a>, <a href="../../javax/swing/JComponent.html#getUIClassID--">getUIClassID</a>, <a href="../../javax/swing/JComponent.html#getVerifyInputWhenFocusTarget--">getVerifyInputWhenFocusTarget</a>, <a href="../../javax/swing/JComponent.html#getVetoableChangeListeners--">getVetoableChangeListeners</a>, <a href="../../javax/swing/JComponent.html#getVisibleRect--">getVisibleRect</a>, <a href="../../javax/swing/JComponent.html#getWidth--">getWidth</a>, <a href="../../javax/swing/JComponent.html#getX--">getX</a>, <a href="../../javax/swing/JComponent.html#getY--">getY</a>, <a href="../../javax/swing/JComponent.html#grabFocus--">grabFocus</a>, <a href="../../javax/swing/JComponent.html#hide--">hide</a>, <a href="../../javax/swing/JComponent.html#isDoubleBuffered--">isDoubleBuffered</a>, <a href="../../javax/swing/JComponent.html#isLightweightComponent-java.awt.Component-">isLightweightComponent</a>, <a href="../../javax/swing/JComponent.html#isManagingFocus--">isManagingFocus</a>, <a href="../../javax/swing/JComponent.html#isOpaque--">isOpaque</a>, <a href="../../javax/swing/JComponent.html#isPaintingForPrint--">isPaintingForPrint</a>, <a href="../../javax/swing/JComponent.html#isPaintingTile--">isPaintingTile</a>, <a href="../../javax/swing/JComponent.html#isRequestFocusEnabled--">isRequestFocusEnabled</a>, <a href="../../javax/swing/JComponent.html#isValidateRoot--">isValidateRoot</a>, <a href="../../javax/swing/JComponent.html#paintBorder-java.awt.Graphics-">paintBorder</a>, <a href="../../javax/swing/JComponent.html#paintChildren-java.awt.Graphics-">paintChildren</a>, <a href="../../javax/swing/JComponent.html#paintImmediately-java.awt.Rectangle-">paintImmediately</a>, <a href="../../javax/swing/JComponent.html#paramString--">paramString</a>, <a href="../../javax/swing/JComponent.html#print-java.awt.Graphics-">print</a>, <a href="../../javax/swing/JComponent.html#printAll-java.awt.Graphics-">printAll</a>, <a href="../../javax/swing/JComponent.html#printBorder-java.awt.Graphics-">printBorder</a>, <a href="../../javax/swing/JComponent.html#printChildren-java.awt.Graphics-">printChildren</a>, <a href="../../javax/swing/JComponent.html#printComponent-java.awt.Graphics-">printComponent</a>, <a href="../../javax/swing/JComponent.html#processComponentKeyEvent-java.awt.event.KeyEvent-">processComponentKeyEvent</a>, <a href="../../javax/swing/JComponent.html#processKeyBinding-javax.swing.KeyStroke-java.awt.event.KeyEvent-int-boolean-">processKeyBinding</a>, <a href="../../javax/swing/JComponent.html#processKeyEvent-java.awt.event.KeyEvent-">processKeyEvent</a>, <a href="../../javax/swing/JComponent.html#processMouseEvent-java.awt.event.MouseEvent-">processMouseEvent</a>, <a href="../../javax/swing/JComponent.html#processMouseMotionEvent-java.awt.event.MouseEvent-">processMouseMotionEvent</a>, <a href="../../javax/swing/JComponent.html#putClientProperty-java.lang.Object-java.lang.Object-">putClientProperty</a>, <a href="../../javax/swing/JComponent.html#registerKeyboardAction-java.awt.event.ActionListener-javax.swing.KeyStroke-int-">registerKeyboardAction</a>, <a href="../../javax/swing/JComponent.html#registerKeyboardAction-java.awt.event.ActionListener-java.lang.String-javax.swing.KeyStroke-int-">registerKeyboardAction</a>, <a href="../../javax/swing/JComponent.html#removeAncestorListener-javax.swing.event.AncestorListener-">removeAncestorListener</a>, <a href="../../javax/swing/JComponent.html#removeVetoableChangeListener-java.beans.VetoableChangeListener-">removeVetoableChangeListener</a>, <a href="../../javax/swing/JComponent.html#repaint-long-int-int-int-int-">repaint</a>, <a href="../../javax/swing/JComponent.html#repaint-java.awt.Rectangle-">repaint</a>, <a href="../../javax/swing/JComponent.html#requestDefaultFocus--">requestDefaultFocus</a>, <a href="../../javax/swing/JComponent.html#requestFocus--">requestFocus</a>, <a href="../../javax/swing/JComponent.html#requestFocus-boolean-">requestFocus</a>, <a href="../../javax/swing/JComponent.html#requestFocusInWindow--">requestFocusInWindow</a>, <a href="../../javax/swing/JComponent.html#requestFocusInWindow-boolean-">requestFocusInWindow</a>, <a href="../../javax/swing/JComponent.html#resetKeyboardActions--">resetKeyboardActions</a>, <a href="../../javax/swing/JComponent.html#reshape-int-int-int-int-">reshape</a>, <a href="../../javax/swing/JComponent.html#revalidate--">revalidate</a>, <a href="../../javax/swing/JComponent.html#scrollRectToVisible-java.awt.Rectangle-">scrollRectToVisible</a>, <a href="../../javax/swing/JComponent.html#setActionMap-javax.swing.ActionMap-">setActionMap</a>, <a href="../../javax/swing/JComponent.html#setAlignmentX-float-">setAlignmentX</a>, <a href="../../javax/swing/JComponent.html#setAlignmentY-float-">setAlignmentY</a>, <a href="../../javax/swing/JComponent.html#setAutoscrolls-boolean-">setAutoscrolls</a>, <a href="../../javax/swing/JComponent.html#setBackground-java.awt.Color-">setBackground</a>, <a href="../../javax/swing/JComponent.html#setComponentPopupMenu-javax.swing.JPopupMenu-">setComponentPopupMenu</a>, <a href="../../javax/swing/JComponent.html#setDebugGraphicsOptions-int-">setDebugGraphicsOptions</a>, <a href="../../javax/swing/JComponent.html#setDefaultLocale-java.util.Locale-">setDefaultLocale</a>, <a href="../../javax/swing/JComponent.html#setDoubleBuffered-boolean-">setDoubleBuffered</a>, <a href="../../javax/swing/JComponent.html#setEnabled-boolean-">setEnabled</a>, <a href="../../javax/swing/JComponent.html#setFocusTraversalKeys-int-java.util.Set-">setFocusTraversalKeys</a>, <a href="../../javax/swing/JComponent.html#setFont-java.awt.Font-">setFont</a>, <a href="../../javax/swing/JComponent.html#setForeground-java.awt.Color-">setForeground</a>, <a href="../../javax/swing/JComponent.html#setInheritsPopupMenu-boolean-">setInheritsPopupMenu</a>, <a href="../../javax/swing/JComponent.html#setInputMap-int-javax.swing.InputMap-">setInputMap</a>, <a href="../../javax/swing/JComponent.html#setInputVerifier-javax.swing.InputVerifier-">setInputVerifier</a>, <a href="../../javax/swing/JComponent.html#setMaximumSize-java.awt.Dimension-">setMaximumSize</a>, <a href="../../javax/swing/JComponent.html#setMinimumSize-java.awt.Dimension-">setMinimumSize</a>, <a href="../../javax/swing/JComponent.html#setNextFocusableComponent-java.awt.Component-">setNextFocusableComponent</a>, <a href="../../javax/swing/JComponent.html#setOpaque-boolean-">setOpaque</a>, <a href="../../javax/swing/JComponent.html#setPreferredSize-java.awt.Dimension-">setPreferredSize</a>, <a href="../../javax/swing/JComponent.html#setRequestFocusEnabled-boolean-">setRequestFocusEnabled</a>, <a href="../../javax/swing/JComponent.html#setToolTipText-java.lang.String-">setToolTipText</a>, <a href="../../javax/swing/JComponent.html#setTransferHandler-javax.swing.TransferHandler-">setTransferHandler</a>, <a href="../../javax/swing/JComponent.html#setUI-javax.swing.plaf.ComponentUI-">setUI</a>, <a href="../../javax/swing/JComponent.html#setVerifyInputWhenFocusTarget-boolean-">setVerifyInputWhenFocusTarget</a>, <a href="../../javax/swing/JComponent.html#setVisible-boolean-">setVisible</a>, <a href="../../javax/swing/JComponent.html#unregisterKeyboardAction-javax.swing.KeyStroke-">unregisterKeyboardAction</a>, <a href="../../javax/swing/JComponent.html#update-java.awt.Graphics-">update</a></code></li>
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<!-- --> </a> <h3>Methods inherited from class java.awt.<a href="../../java/awt/Container.html" title="class in java.awt">Container</a></h3> <code><a href="../../java/awt/Container.html#add-java.awt.Component-">add</a>, <a href="../../java/awt/Container.html#add-java.awt.Component-int-">add</a>, <a href="../../java/awt/Container.html#add-java.awt.Component-java.lang.Object-">add</a>, <a href="../../java/awt/Container.html#add-java.awt.Component-java.lang.Object-int-">add</a>, <a href="../../java/awt/Container.html#add-java.lang.String-java.awt.Component-">add</a>, <a href="../../java/awt/Container.html#addContainerListener-java.awt.event.ContainerListener-">addContainerListener</a>, <a href="../../java/awt/Container.html#addPropertyChangeListener-java.beans.PropertyChangeListener-">addPropertyChangeListener</a>, <a href="../../java/awt/Container.html#addPropertyChangeListener-java.lang.String-java.beans.PropertyChangeListener-">addPropertyChangeListener</a>, <a href="../../java/awt/Container.html#applyComponentOrientation-java.awt.ComponentOrientation-">applyComponentOrientation</a>, <a href="../../java/awt/Container.html#areFocusTraversalKeysSet-int-">areFocusTraversalKeysSet</a>, <a href="../../java/awt/Container.html#countComponents--">countComponents</a>, <a href="../../java/awt/Container.html#deliverEvent-java.awt.Event-">deliverEvent</a>, <a href="../../java/awt/Container.html#findComponentAt-int-int-">findComponentAt</a>, <a href="../../java/awt/Container.html#findComponentAt-java.awt.Point-">findComponentAt</a>, <a href="../../java/awt/Container.html#getComponent-int-">getComponent</a>, <a href="../../java/awt/Container.html#getComponentAt-int-int-">getComponentAt</a>, <a href="../../java/awt/Container.html#getComponentAt-java.awt.Point-">getComponentAt</a>, <a href="../../java/awt/Container.html#getComponentCount--">getComponentCount</a>, <a href="../../java/awt/Container.html#getComponents--">getComponents</a>, <a href="../../java/awt/Container.html#getComponentZOrder-java.awt.Component-">getComponentZOrder</a>, <a href="../../java/awt/Container.html#getContainerListeners--">getContainerListeners</a>, <a href="../../java/awt/Container.html#getFocusTraversalKeys-int-">getFocusTraversalKeys</a>, <a href="../../java/awt/Container.html#getFocusTraversalPolicy--">getFocusTraversalPolicy</a>, <a href="../../java/awt/Container.html#getLayout--">getLayout</a>, <a href="../../java/awt/Container.html#getMousePosition-boolean-">getMousePosition</a>, <a href="../../java/awt/Container.html#insets--">insets</a>, <a href="../../java/awt/Container.html#invalidate--">invalidate</a>, <a href="../../java/awt/Container.html#isAncestorOf-java.awt.Component-">isAncestorOf</a>, <a href="../../java/awt/Container.html#isFocusCycleRoot--">isFocusCycleRoot</a>, <a href="../../java/awt/Container.html#isFocusCycleRoot-java.awt.Container-">isFocusCycleRoot</a>, <a href="../../java/awt/Container.html#isFocusTraversalPolicyProvider--">isFocusTraversalPolicyProvider</a>, <a href="../../java/awt/Container.html#isFocusTraversalPolicySet--">isFocusTraversalPolicySet</a>, <a href="../../java/awt/Container.html#layout--">layout</a>, <a href="../../java/awt/Container.html#list-java.io.PrintStream-int-">list</a>, <a href="../../java/awt/Container.html#list-java.io.PrintWriter-int-">list</a>, <a href="../../java/awt/Container.html#locate-int-int-">locate</a>, <a href="../../java/awt/Container.html#minimumSize--">minimumSize</a>, <a href="../../java/awt/Container.html#paintComponents-java.awt.Graphics-">paintComponents</a>, <a href="../../java/awt/Container.html#preferredSize--">preferredSize</a>, <a href="../../java/awt/Container.html#printComponents-java.awt.Graphics-">printComponents</a>, <a href="../../java/awt/Container.html#processContainerEvent-java.awt.event.ContainerEvent-">processContainerEvent</a>, <a href="../../java/awt/Container.html#processEvent-java.awt.AWTEvent-">processEvent</a>, <a href="../../java/awt/Container.html#remove-int-">remove</a>, <a href="../../java/awt/Container.html#removeContainerListener-java.awt.event.ContainerListener-">removeContainerListener</a>, <a href="../../java/awt/Container.html#setComponentZOrder-java.awt.Component-int-">setComponentZOrder</a>, <a href="../../java/awt/Container.html#setFocusCycleRoot-boolean-">setFocusCycleRoot</a>, <a href="../../java/awt/Container.html#setFocusTraversalPolicy-java.awt.FocusTraversalPolicy-">setFocusTraversalPolicy</a>, <a href="../../java/awt/Container.html#setFocusTraversalPolicyProvider-boolean-">setFocusTraversalPolicyProvider</a>, <a href="../../java/awt/Container.html#transferFocusDownCycle--">transferFocusDownCycle</a>, <a href="../../java/awt/Container.html#validate--">validate</a>, <a href="../../java/awt/Container.html#validateTree--">validateTree</a></code></li>
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href="../../java/awt/Component.html#removePropertyChangeListener-java.beans.PropertyChangeListener-">removePropertyChangeListener</a>, <a href="../../java/awt/Component.html#removePropertyChangeListener-java.lang.String-java.beans.PropertyChangeListener-">removePropertyChangeListener</a>, <a href="../../java/awt/Component.html#repaint--">repaint</a>, <a href="../../java/awt/Component.html#repaint-int-int-int-int-">repaint</a>, <a href="../../java/awt/Component.html#repaint-long-">repaint</a>, <a href="../../java/awt/Component.html#resize-java.awt.Dimension-">resize</a>, <a href="../../java/awt/Component.html#resize-int-int-">resize</a>, <a href="../../java/awt/Component.html#setBounds-int-int-int-int-">setBounds</a>, <a href="../../java/awt/Component.html#setBounds-java.awt.Rectangle-">setBounds</a>, <a href="../../java/awt/Component.html#setComponentOrientation-java.awt.ComponentOrientation-">setComponentOrientation</a>, <a 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href="../../java/awt/Component.html#show-boolean-">show</a>, <a href="../../java/awt/Component.html#size--">size</a>, <a href="../../java/awt/Component.html#toString--">toString</a>, <a href="../../java/awt/Component.html#transferFocus--">transferFocus</a>, <a href="../../java/awt/Component.html#transferFocusBackward--">transferFocusBackward</a>, <a href="../../java/awt/Component.html#transferFocusUpCycle--">transferFocusUpCycle</a></code></li>
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<!-- --> </a> <h3>Methods inherited from class java.lang.<a href="../../java/lang/Object.html" title="class in java.lang">Object</a></h3> <code><a href="../../java/lang/Object.html#clone--">clone</a>, <a href="../../java/lang/Object.html#equals-java.lang.Object-">equals</a>, <a href="../../java/lang/Object.html#finalize--">finalize</a>, <a href="../../java/lang/Object.html#getClass--">getClass</a>, <a href="../../java/lang/Object.html#hashCode--">hashCode</a>, <a href="../../java/lang/Object.html#notify--">notify</a>, <a href="../../java/lang/Object.html#notifyAll--">notifyAll</a>, <a href="../../java/lang/Object.html#wait--">wait</a>, <a href="../../java/lang/Object.html#wait-long-">wait</a>, <a href="../../java/lang/Object.html#wait-long-int-">wait</a></code></li>
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<li class="blockList"><a name="constructor.detail">
<!-- --> </a> <h3>构造方法详细信息</h3> <a name="JLayer--">
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<ul class="blockList">
<li class="blockList"> <h4>JLayer</h4> <pre>public JLayer()</pre>
<div class="block">
<span>创建一个新的<code>JLayer</code>对象与一个<code>null</code>视图组件和默认<a href="../../javax/swing/plaf/LayerUI.html" title="javax.swing.plaf中的类"><code>LayerUI</code></a> 。</span>
</div>
<dl>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../javax/swing/JLayer.html#setView-V-"><code>setView(V)</code></a> ，
<a href="../../javax/swing/JLayer.html#setUI-javax.swing.plaf.LayerUI-"><code>setUI(javax.swing.plaf.LayerUI&lt;? super V&gt;)</code></a>
</dd>
</dl> </li>
</ul> <a name="JLayer-java.awt.Component-">
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<ul class="blockList">
<li class="blockList"> <h4>JLayer</h4> <pre>public JLayer(<a href="../../javax/swing/JLayer.html" title="type parameter in JLayer">V</a> view)</pre>
<div class="block">
<span>创建一个新的<code>JLayer</code>对象，默认值为<a href="../../javax/swing/plaf/LayerUI.html" title="javax.swing.plaf中的类"><code>LayerUI</code></a> 。</span>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>view</code> - 要由此装饰的
<code>JLayer</code>
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../javax/swing/JLayer.html#setUI-javax.swing.plaf.LayerUI-"><code>setUI(javax.swing.plaf.LayerUI&lt;? super V&gt;)</code></a>
</dd>
</dl> </li>
</ul> <a name="JLayer-java.awt.Component-javax.swing.plaf.LayerUI-">
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<ul class="blockListLast">
<li class="blockList"> <h4>JLayer</h4> <pre>public JLayer(<a href="../../javax/swing/JLayer.html" title="type parameter in JLayer">V</a> view,
<a href="../../javax/swing/plaf/LayerUI.html" title="class in javax.swing.plaf">LayerUI</a>&lt;<a href="../../javax/swing/JLayer.html" title="type parameter in JLayer">V</a>&gt; ui)</pre>
<div class="block">
<span>创建一个新的<code>JLayer</code>具有指定视图组件和对象<a href="../../javax/swing/plaf/LayerUI.html" title="javax.swing.plaf中的类"><code>LayerUI</code></a>对象。</span>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>view</code> - 要装饰的组件
</dd>
<dd>
<span><code>ui</code> - <a href="../../javax/swing/plaf/LayerUI.html" title="javax.swing.plaf中的类"><code>LayerUI</code></a>代表将被这个<code>JLayer</code></span>
</dd>
</dl> </li>
</ul> </li>
</ul>
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<li class="blockList"> <h4>getView</h4> <pre>public <a href="../../javax/swing/JLayer.html" title="type parameter in JLayer">V</a> getView()</pre>
<div class="block">
<span>返回<code>JLayer</code>的视图组件或<code>null</code> 。</span>
<br/>
<span>这是一个绑定属性。</span>
</div>
<dl>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
<code>JLayer</code>的视图组件或
<code>null</code>如果不存在）
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../javax/swing/JLayer.html#setView-V-"><code>setView(Component)</code></a>
</dd>
</dl> </li>
</ul> <a name="setView-java.awt.Component-">
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<ul class="blockList">
<li class="blockList"> <h4>setView</h4> <pre>public void setView(<a href="../../javax/swing/JLayer.html" title="type parameter in JLayer">V</a> view)</pre>
<div class="block">
<span>设置<code>JLayer</code>的视图组件，可以是<code>null</code> 。</span>
<br/>
<span>这是一个绑定属性。</span>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>view</code> - 这个
<code>JLayer</code>的视图
<code>JLayer</code>
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../javax/swing/JLayer.html#getView--"><code>getView()</code></a>
</dd>
</dl> </li>
</ul> <a name="setUI-javax.swing.plaf.LayerUI-">
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<ul class="blockList">
<li class="blockList"> <h4>setUI</h4> <pre>public void setUI(<a href="../../javax/swing/plaf/LayerUI.html" title="class in javax.swing.plaf">LayerUI</a>&lt;? super <a href="../../javax/swing/JLayer.html" title="type parameter in JLayer">V</a>&gt; ui)</pre>
<div class="block">
<span>设置<a href="../../javax/swing/plaf/LayerUI.html" title="javax.swing.plaf中的类"><code>LayerUI</code></a> ，它将执行绘图并接收<code>JLayer</code>输入事件。</span>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<span><code>ui</code> - <a href="../../javax/swing/plaf/LayerUI.html" title="javax.swing.plaf中的类"><code>LayerUI</code></a>为这<code>JLayer</code></span>
</dd>
</dl> </li>
</ul> <a name="getUI--">
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<ul class="blockList">
<li class="blockList"> <h4>getUI</h4> <pre>public <a href="../../javax/swing/plaf/LayerUI.html" title="class in javax.swing.plaf">LayerUI</a>&lt;? super <a href="../../javax/swing/JLayer.html" title="type parameter in JLayer">V</a>&gt; getUI()</pre>
<div class="block">
<span>返回这个<a href="../../javax/swing/plaf/LayerUI.html" title="javax.swing.plaf中的类">JLayer</a>的<code>JLayer</code> 。</span>
</div>
<dl>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
<code>LayerUI</code>为这
<code>JLayer</code>
</dd>
</dl> </li>
</ul> <a name="getGlassPane--">
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<ul class="blockList">
<li class="blockList"> <h4>getGlassPane</h4> <pre>public <a href="../../javax/swing/JPanel.html" title="class in javax.swing">JPanel</a> getGlassPane()</pre>
<div class="block">
<span>返回<code>JLayer</code>的glassPane组件或<code>null</code> 。</span>
<br/>
<span>这是一个绑定属性。</span>
</div>
<dl>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
<code>JLayer</code>的glassPane组件或
<code>null</code>如果不存在）
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../javax/swing/JLayer.html#setGlassPane-javax.swing.JPanel-"><code>setGlassPane(JPanel)</code></a>
</dd>
</dl> </li>
</ul> <a name="setGlassPane-javax.swing.JPanel-">
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<ul class="blockList">
<li class="blockList"> <h4>setGlassPane</h4> <pre>public void setGlassPane(<a href="../../javax/swing/JPanel.html" title="class in javax.swing">JPanel</a> glassPane)</pre>
<div class="block">
<span>设置<code>JLayer</code>的glassPane组件，可以是<code>null</code> 。</span>
<br/>
<span>这是一个绑定属性。</span>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>glassPane</code> - 这个JLayer的glassPane
<code>JLayer</code>
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../javax/swing/JLayer.html#getGlassPane--"><code>getGlassPane()</code></a>
</dd>
</dl> </li>
</ul> <a name="createGlassPane--">
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<ul class="blockList">
<li class="blockList"> <h4>createGlassPane</h4> <pre>public <a href="../../javax/swing/JPanel.html" title="class in javax.swing">JPanel</a> createGlassPane()</pre>
<div class="block">
<span>由构造函数调用方法创建一个默认值<code>glassPane</code> 。</span>
<span>默认情况下，此方法创建一个新的JPanel，其可见性设置为true和opacity设置为false。</span>
</div>
<dl>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
默认为
<code>glassPane</code>
</dd>
</dl> </li>
</ul> <a name="setLayout-java.awt.LayoutManager-">
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<ul class="blockList">
<li class="blockList"> <h4>setLayout</h4> <pre>public void setLayout(<a href="../../java/awt/LayoutManager.html" title="interface in java.awt">LayoutManager</a> mgr)</pre>
<div class="block">
<span>设置此容器的布局管理器。</span>
<span>该方法被覆盖以防止布局管理器被设置。</span>
<p> <span>注意：如果<code>mgr</code>是非<code>null</code> ，此方法将抛出一个异常，布局管理器不支持在<code>JLayer</code> 。</span> </p>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../java/awt/Container.html#setLayout-java.awt.LayoutManager-">setLayout</a></code>在
<code><a href="../../java/awt/Container.html" title="class in java.awt">Container</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>mgr</code> - 指定的布局管理器
</dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../java/lang/IllegalArgumentException.html" title="class in java.lang">IllegalArgumentException</a></code> - 不支持此方法
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../java/awt/Container.html#doLayout--"><code>Container.doLayout()</code></a> ，
<a href="../../java/awt/Container.html#getLayout--"><code>Container.getLayout()</code></a> ，
<a href="../../java/awt/Container.html#invalidate--"><code>Container.invalidate()</code></a>
</dd>
</dl> </li>
</ul> <a name="setBorder-javax.swing.border.Border-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>setBorder</h4> <pre>public void setBorder(<a href="../../javax/swing/border/Border.html" title="interface in javax.swing.border">Border</a> border)</pre>
<div class="block">
<span>不支持非<code>null</code>边框或非零插值，以防止此组件的几何变得足够复杂，以禁止<code>LayerUI</code>类的<code>LayerUI</code>类化。</span>
<span>要创建带有边框的<code>JLayer</code> ，请将其添加到具有边框的<code>JPanel</code> 。</span>
<p> <span>注意：如果<code>border</code>是非<code>null</code> ，该方法将抛出一个异常上不支持边框上<code>JLayer</code> 。</span> </p>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../javax/swing/JComponent.html#setBorder-javax.swing.border.Border-">setBorder</a></code>在
<code><a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>border</code> - 要设置的
<code>Border</code>
</dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../java/lang/IllegalArgumentException.html" title="class in java.lang">IllegalArgumentException</a></code> - 不支持此方法
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<span><a href="../../javax/swing/border/Border.html" title="javax.swing.border中的接口"><code>Border</code></a> ， <a href="../../javax/swing/border/CompoundBorder.html" title="javax.swing.border中的类"><code>CompoundBorder</code></a></span>
</dd>
</dl> </li>
</ul> <a name="addImpl-java.awt.Component-java.lang.Object-int-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>addImpl</h4> <pre>protected void addImpl(<a href="../../java/awt/Component.html" title="class in java.awt">Component</a> comp,
<a href="../../java/lang/Object.html" title="class in java.lang">Object</a> constraints,
int index)</pre>
<div class="block">
这种方法不支持
<code>JLayer</code> ，总是抛出
<code>UnsupportedOperationException</code>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../java/awt/Container.html#addImpl-java.awt.Component-java.lang.Object-int-">addImpl</a></code>在
<code><a href="../../java/awt/Container.html" title="class in java.awt">Container</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>comp</code> - 要添加的组件
</dd>
<dd>
<code>constraints</code> - 表示此组件的布局约束的对象
</dd>
<dd>
<code>index</code> - 容器列表中插入组件的位置，其中
<code>-1</code>表示附加到最后
</dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../java/lang/UnsupportedOperationException.html" title="class in java.lang">UnsupportedOperationException</a></code> - 不支持此方法
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../javax/swing/JLayer.html#setView-V-"><code>setView(Component)</code></a> ，
<a href="../../javax/swing/JLayer.html#setGlassPane-javax.swing.JPanel-"><code>setGlassPane(JPanel)</code></a>
</dd>
</dl> </li>
</ul> <a name="remove-java.awt.Component-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>remove</h4> <pre>public void remove(<a href="../../java/awt/Component.html" title="class in java.awt">Component</a> comp)</pre>
<div class="block">
<span>从此容器中删除指定的组件。</span>
<span>该方法还通知布局管理器通过<code>removeLayoutComponent</code>方法从该容器的布局中<code>removeLayoutComponent</code> 。</span>
<p> <span>该方法更改布局相关信息，因此使组件层次结构无效。</span> <span>如果已经显示了容器，则此后必须验证层次结构以反映更改。</span> </p>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../java/awt/Container.html#remove-java.awt.Component-">remove</a></code>在
<code><a href="../../java/awt/Container.html" title="class in java.awt">Container</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>comp</code> - 要删除的组件
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../java/awt/Container.html#add-java.awt.Component-"><code>Container.add(java.awt.Component)</code></a> ，
<a href="../../java/awt/Container.html#invalidate--"><code>Container.invalidate()</code></a> ，
<a href="../../java/awt/Container.html#validate--"><code>Container.validate()</code></a> ，
<a href="../../java/awt/Container.html#remove-int-"><code>Container.remove(int)</code></a>
</dd>
</dl> </li>
</ul> <a name="removeAll--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>removeAll</h4> <pre>public void removeAll()</pre>
<div class="block">
<span>从此容器中删除所有组件。</span>
<span>此方法还通知布局管理器通过<code>removeLayoutComponent</code>方法从该容器的布局中<code>removeLayoutComponent</code> 。</span>
<p> <span>该方法更改布局相关信息，因此使组件层次结构无效。</span> <span>如果已经显示了容器，则此后必须验证层次结构以反映更改。</span> </p>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../java/awt/Container.html#removeAll--">removeAll</a></code>在
<code><a href="../../java/awt/Container.html" title="class in java.awt">Container</a></code>
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../java/awt/Container.html#add-java.awt.Component-"><code>Container.add(java.awt.Component)</code></a> ，
<a href="../../java/awt/Container.html#remove-int-"><code>Container.remove(int)</code></a> ，
<a href="../../java/awt/Container.html#invalidate--"><code>Container.invalidate()</code></a>
</dd>
</dl> </li>
</ul> <a name="isPaintingOrigin--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>isPaintingOrigin</h4> <pre>protected boolean isPaintingOrigin()</pre>
<div class="block">
始终返回
<code>true</code> ，使绘画来源于
<code>JLayer</code>或其祖先之一。
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../javax/swing/JComponent.html#isPaintingOrigin--">isPaintingOrigin</a></code>在
<code><a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a></code>
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
真正
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../javax/swing/JComponent.html#isPaintingOrigin--"><code>JComponent.isPaintingOrigin()</code></a>
</dd>
</dl> </li>
</ul> <a name="paintImmediately-int-int-int-int-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>paintImmediately</h4> <pre>public void paintImmediately(int x,
int y,
int w,
int h)</pre>
<div class="block">
将其功能委托给
<a href="../../javax/swing/plaf/LayerUI.html#paintImmediately-int-int-int-int-javax.swing.JLayer-"><code>LayerUI.paintImmediately(int, int, int, int, JLayer)</code></a>方法，如果设置为
<code>LayerUI</code> 。
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../javax/swing/JComponent.html#paintImmediately-int-int-int-int-">paintImmediately</a></code>在
<code><a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>x</code> - 要绘制的区域的x值
</dd>
<dd>
<code>y</code> - 要绘制的区域的y值
</dd>
<dd>
<code>w</code> - 要涂漆的区域的宽度
</dd>
<dd>
<code>h</code> - 要涂漆的区域的高度
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../javax/swing/JComponent.html#repaint-long-int-int-int-int-"><code>JComponent.repaint(long, int, int, int, int)</code></a> ，
<a href="../../javax/swing/JComponent.html#isPaintingOrigin--"><code>JComponent.isPaintingOrigin()</code></a>
</dd>
</dl> </li>
</ul> <a name="paint-java.awt.Graphics-">
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<ul class="blockList">
<li class="blockList"> <h4>paint</h4> <pre>public void paint(<a href="../../java/awt/Graphics.html" title="class in java.awt">Graphics</a> g)</pre>
<div class="block">
<span>代表所有绘画到<a href="../../javax/swing/plaf/LayerUI.html" title="javax.swing.plaf中的类"><code>LayerUI</code></a>对象。</span>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../javax/swing/JComponent.html#paint-java.awt.Graphics-">paint</a></code>在类
<code><a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>g</code> - 要呈现的
<code>Graphics</code>
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../javax/swing/JComponent.html#paintComponent-java.awt.Graphics-"><code>JComponent.paintComponent(java.awt.Graphics)</code></a> ，
<a href="../../javax/swing/JComponent.html#paintBorder-java.awt.Graphics-"><code>JComponent.paintBorder(java.awt.Graphics)</code></a> ，
<a href="../../javax/swing/JComponent.html#paintChildren-java.awt.Graphics-"><code>JComponent.paintChildren(java.awt.Graphics)</code></a> ，
<a href="../../javax/swing/JComponent.html#getComponentGraphics-java.awt.Graphics-"><code>JComponent.getComponentGraphics(java.awt.Graphics)</code></a> ，
<a href="../../javax/swing/JComponent.html#repaint-long-int-int-int-int-"><code>JComponent.repaint(long, int, int, int, int)</code></a>
</dd>
</dl> </li>
</ul> <a name="paintComponent-java.awt.Graphics-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>paintComponent</h4> <pre>protected void paintComponent(<a href="../../java/awt/Graphics.html" title="class in java.awt">Graphics</a> g)</pre>
<div class="block">
这种方法是空的，因为所有的绘画都是由
<a href="../../javax/swing/JLayer.html#paint-java.awt.Graphics-"><code>paint(Graphics)</code></a>和
<a href="../../javax/swing/plaf/ComponentUI.html#update-java.awt.Graphics-javax.swing.JComponent-"><code>ComponentUI.update(Graphics, JComponent)</code></a>方法完成的
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../javax/swing/JComponent.html#paintComponent-java.awt.Graphics-">paintComponent</a></code>在
<code><a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>g</code> - 要保护的
<code>Graphics</code>对象
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<span><a href="../../javax/swing/JComponent.html#paint-java.awt.Graphics-"><code>JComponent.paint(java.awt.Graphics)</code></a> ， <a href="../../javax/swing/plaf/ComponentUI.html" title="javax.swing.plaf中的类"><code>ComponentUI</code></a></span>
</dd>
</dl> </li>
</ul> <a name="isOptimizedDrawingEnabled--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>isOptimizedDrawingEnabled</h4> <pre>public boolean isOptimizedDrawingEnabled()</pre>
<div class="block">
<span><code>JLayer</code>覆盖此方法的默认实现（在<code>JComponent</code> ）以返回<code>false</code> 。</span>
<span>这确保了绘图机器将调用<code>JLayer</code>的<code>paint</code>实现，而不是直接发送<code>JLayer</code>的孩子。</span>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../javax/swing/JComponent.html#isOptimizedDrawingEnabled--">isOptimizedDrawingEnabled</a></code>在
<code><a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a></code>
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
假
</dd>
</dl> </li>
</ul> <a name="propertyChange-java.beans.PropertyChangeEvent-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>propertyChange</h4> <pre>public void propertyChange(<a href="../../java/beans/PropertyChangeEvent.html" title="class in java.beans">PropertyChangeEvent</a> evt)</pre>
<div class="block">
当绑定属性更改时，此方法将被调用。
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../java/beans/PropertyChangeListener.html#propertyChange-java.beans.PropertyChangeEvent-">propertyChange</a></code>在接口
<code><a href="../../java/beans/PropertyChangeListener.html" title="interface in java.beans">PropertyChangeListener</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>evt</code> - 描述事件源和已更改的属性的PropertyChangeEvent对象。
</dd>
</dl> </li>
</ul> <a name="setLayerEventMask-long-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>setLayerEventMask</h4> <pre>public void setLayerEventMask(long layerEventMask)</pre>
<div class="block">
<span>启用来自JLayer <b>及其指定</b>事件掩码参数定义的所有后代的事件传递给<a href="../../javax/swing/plaf/LayerUI.html#eventDispatched-java.awt.AWTEvent-javax.swing.JLayer-"><code>LayerUI.eventDispatched(AWTEvent, JLayer)</code></a>方法。</span>
<p> <span>事件被传递提供<code>LayerUI</code>设置为这个<code>JLayer</code>和<code>JLayer</code>可以显示。</span> </p>
<p> <span>下面的示例示出了如何正确地使用该方法在<code>LayerUI</code>实现：</span> </p>
<pre> <span>public void installUI(JComponent c) {
super.installUI(c);
JLayer l = (JLayer) c;
// this LayerUI will receive only key and focus events
l.setLayerEventMask(AWTEvent.KEY_EVENT_MASK | AWTEvent.FOCUS_EVENT_MASK);
}
public void uninstallUI(JComponent c) {
super.uninstallUI(c);
JLayer l = (JLayer) c;
// JLayer must be returned to its initial state
l.setLayerEventMask(0);
}</span> </pre>
<span>默认情况下， <code>JLayer</code>收到事件，其事件掩码为<code>0</code> 。</span>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>layerEventMask</code> - 要接收的事件类型的位掩码
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../javax/swing/JLayer.html#getLayerEventMask--"><code>getLayerEventMask()</code></a> ，
<a href="../../javax/swing/plaf/LayerUI.html#eventDispatched-java.awt.AWTEvent-javax.swing.JLayer-"><code>LayerUI.eventDispatched(AWTEvent, JLayer)</code></a> ，
<a href="../../java/awt/Component.html#isDisplayable--"><code>Component.isDisplayable()</code></a>
</dd>
</dl> </li>
</ul> <a name="getLayerEventMask--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>getLayerEventMask</h4> <pre>public long getLayerEventMask()</pre>
<div class="block">
<span>返回此<code>JLayer</code>及其<code>LayerUI</code>接收的事件掩码的位图。</span>
<p> <span>这意味着<a href="../../javax/swing/plaf/LayerUI.html#eventDispatched-java.awt.AWTEvent-javax.swing.JLayer-"><code>LayerUI.eventDispatched(AWTEvent, JLayer)</code></a>方法将只接收与事件掩码匹配的事件。</span> </p>
<p> <span>默认情况下<code>JLayer</code>收到任何事件。</span> </p>
</div>
<dl>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
事件类型的位掩码为
<code>JLayer</code>
</dd>
</dl> </li>
</ul> <a name="updateUI--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>updateUI</h4> <pre>public void updateUI()</pre>
<div class="block">
将其功能委托给
<a href="../../javax/swing/plaf/LayerUI.html#updateUI-javax.swing.JLayer-"><code>LayerUI.updateUI(JLayer)</code></a>方法，如果设置为
<code>LayerUI</code> 。
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../javax/swing/JComponent.html#updateUI--">updateUI</a></code>在
<code><a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a></code>类
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../javax/swing/JComponent.html#setUI-javax.swing.plaf.ComponentUI-"><code>JComponent.setUI(javax.swing.plaf.ComponentUI)</code></a> ，
<a href="../../javax/swing/UIManager.html#getLookAndFeel--"><code>UIManager.getLookAndFeel()</code></a> ，
<a href="../../javax/swing/UIManager.html#getUI-javax.swing.JComponent-"><code>UIManager.getUI(javax.swing.JComponent)</code></a>
</dd>
</dl> </li>
</ul> <a name="getPreferredScrollableViewportSize--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>getPreferredScrollableViewportSize</h4> <pre>public <a href="../../java/awt/Dimension.html" title="class in java.awt">Dimension</a> getPreferredScrollableViewportSize()</pre>
<div class="block">
<span>返回视图组件的视口的首选大小。</span>
<p> <span>如果此层的视图组件实现<a href="../../javax/swing/Scrollable.html" title="javax.swing中的接口"><code>Scrollable</code></a> ，则此方法将其实现委托给视图组件。</span> </p>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../javax/swing/Scrollable.html#getPreferredScrollableViewportSize--">getPreferredScrollableViewportSize</a></code>在接口
<code><a href="../../javax/swing/Scrollable.html" title="interface in javax.swing">Scrollable</a></code>
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
视图组件的视口的首选大小
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<span><a href="../../javax/swing/Scrollable.html" title="javax.swing中的接口"><code>Scrollable</code></a></span>
</dd>
</dl> </li>
</ul> <a name="getScrollableBlockIncrement-java.awt.Rectangle-int-int-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>getScrollableBlockIncrement</h4> <pre>public int getScrollableBlockIncrement(<a href="../../java/awt/Rectangle.html" title="class in java.awt">Rectangle</a> visibleRect,
int orientation,
int direction)</pre>
<div class="block">
<span>返回滚动增量，这是显示逻辑行或列的组件所必需的，以便根据方向的值完全暴露一个行或列的块。</span>
<p> <span>如果此层的视图组件实现<a href="../../javax/swing/Scrollable.html" title="javax.swing中的接口"><code>Scrollable</code></a> ，则此方法将其实现委托给视图组件。</span> </p>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../javax/swing/Scrollable.html#getScrollableBlockIncrement-java.awt.Rectangle-int-int-">getScrollableBlockIncrement</a></code>在接口
<code><a href="../../javax/swing/Scrollable.html" title="interface in javax.swing">Scrollable</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>visibleRect</code> - 在视口内可见的视图区域
</dd>
<dd>
<code>orientation</code> - SwingConstants.VERTICAL或SwingConstants.HORIZONTAL。
</dd>
<dd>
<code>direction</code> - 向上/向左滚动小于0，向下/向右大于零。
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
在指定方向滚动的“块”增量
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<span><a href="../../javax/swing/Scrollable.html" title="javax.swing中的接口"><code>Scrollable</code></a></span>
</dd>
</dl> </li>
</ul> <a name="getScrollableTracksViewportHeight--">
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<ul class="blockList">
<li class="blockList"> <h4>getScrollableTracksViewportHeight</h4> <pre>public boolean getScrollableTracksViewportHeight()</pre>
<div class="block">
<span>返回<code>false</code>以指示视口的高度不会确定图层的高度，除非图层的首选高度小于视口的高度。</span>
<p> <span>如果此层的视图组件实现<a href="../../javax/swing/Scrollable.html" title="javax.swing中的接口"><code>Scrollable</code></a> ，则此方法将其实现委托给视图组件。</span> </p>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../javax/swing/Scrollable.html#getScrollableTracksViewportHeight--">getScrollableTracksViewportHeight</a></code>中的
<code><a href="../../javax/swing/Scrollable.html" title="interface in javax.swing">Scrollable</a></code>
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
图层是否应跟踪视口的高度
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<span><a href="../../javax/swing/Scrollable.html" title="javax.swing中的接口"><code>Scrollable</code></a></span>
</dd>
</dl> </li>
</ul> <a name="getScrollableTracksViewportWidth--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>getScrollableTracksViewportWidth</h4> <pre>public boolean getScrollableTracksViewportWidth()</pre>
<div class="block">
<span>返回<code>false</code> ，以表示视口的宽度不会确定图层的宽度，除非图层的首选宽度小于视口的宽度。</span>
<p> <span>如果此层的视图组件实现<a href="../../javax/swing/Scrollable.html" title="javax.swing中的接口"><code>Scrollable</code></a> ，则此方法将其实现委托给视图组件。</span> </p>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../javax/swing/Scrollable.html#getScrollableTracksViewportWidth--">getScrollableTracksViewportWidth</a></code>在接口
<code><a href="../../javax/swing/Scrollable.html" title="interface in javax.swing">Scrollable</a></code>
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
图层是否应跟踪视口的宽度
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<span><a href="../../javax/swing/Scrollable.html" title="javax.swing中的接口"><code>Scrollable</code></a></span>
</dd>
</dl> </li>
</ul> <a name="getScrollableUnitIncrement-java.awt.Rectangle-int-int-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>getScrollableUnitIncrement</h4> <pre>public int getScrollableUnitIncrement(<a href="../../java/awt/Rectangle.html" title="class in java.awt">Rectangle</a> visibleRect,
int orientation,
int direction)</pre>
<div class="block">
<span>返回滚动增量，这是显示逻辑行或列的组件所必需的，以便根据方向的值完全暴露一个新行或列。</span>
<span>理想情况下，组件应通过返回完全暴露项目所需的距离来处理部分暴露的行或列。</span>
<p> <span>滚动容器，如<code>JScrollPane</code> ，将在用户请求单位滚动时使用此方法。</span> </p>
<p> <span>如果此层的视图组件实现<a href="../../javax/swing/Scrollable.html" title="javax.swing中的接口"><code>Scrollable</code></a> ，则此方法将其实现委托给视图组件。</span> </p>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../javax/swing/Scrollable.html#getScrollableUnitIncrement-java.awt.Rectangle-int-int-">getScrollableUnitIncrement</a></code>在接口
<code><a href="../../javax/swing/Scrollable.html" title="interface in javax.swing">Scrollable</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>visibleRect</code> - 在视口内可见的视图区域
</dd>
<dd>
<code>orientation</code> - SwingConstants.VERTICAL或SwingConstants.HORIZONTAL。
</dd>
<dd>
<code>direction</code> - 向上/向左滚动小于0，向下/向右大于零。
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
<span>在指定方向滚动的“单位”增量。</span>
<span>该值应始终为正。</span>
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<span><a href="../../javax/swing/Scrollable.html" title="javax.swing中的接口"><code>Scrollable</code></a></span>
</dd>
</dl> </li>
</ul> <a name="addNotify--">
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<ul class="blockList">
<li class="blockList"> <h4>addNotify</h4> <pre>public void addNotify()</pre>
<div class="block">
<span>通知此组件它现在有一个父组件。</span>
<span>调用此方法时，父组件链设置为<code>KeyboardAction</code>事件侦听器。</span>
<span>该方法在内部被工具包调用，不应该被程序直接调用。</span>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../javax/swing/JComponent.html#addNotify--">addNotify</a></code>在
<code><a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a></code>
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../javax/swing/JComponent.html#registerKeyboardAction-java.awt.event.ActionListener-java.lang.String-javax.swing.KeyStroke-int-"><code>JComponent.registerKeyboardAction(java.awt.event.ActionListener, java.lang.String, javax.swing.KeyStroke, int)</code></a>
</dd>
</dl> </li>
</ul> <a name="removeNotify--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>removeNotify</h4> <pre>public void removeNotify()</pre>
<div class="block">
<span>通知此组件它不再具有父组件。</span>
<span>当调用此方法时，将删除在父组件链中设置的任何<code>KeyboardAction</code> 。</span>
<span>该方法在内部被工具包调用，不应该被程序直接调用。</span>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../javax/swing/JComponent.html#removeNotify--">removeNotify</a></code>在
<code><a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a></code>
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../javax/swing/JComponent.html#registerKeyboardAction-java.awt.event.ActionListener-java.lang.String-javax.swing.KeyStroke-int-"><code>JComponent.registerKeyboardAction(java.awt.event.ActionListener, java.lang.String, javax.swing.KeyStroke, int)</code></a>
</dd>
</dl> </li>
</ul> <a name="doLayout--">
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<ul class="blockList">
<li class="blockList"> <h4>doLayout</h4> <pre>public void doLayout()</pre>
<div class="block">
将其功能委托给
<a href="../../javax/swing/plaf/LayerUI.html#doLayout-javax.swing.JLayer-"><code>LayerUI.doLayout(JLayer)</code></a>方法，如果设置为
<code>LayerUI</code> 。
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../java/awt/Container.html#doLayout--">doLayout</a></code>在
<code><a href="../../java/awt/Container.html" title="class in java.awt">Container</a></code>
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../java/awt/LayoutManager.html#layoutContainer-java.awt.Container-"><code>LayoutManager.layoutContainer(java.awt.Container)</code></a> ，
<a href="../../java/awt/Container.html#setLayout-java.awt.LayoutManager-"><code>Container.setLayout(java.awt.LayoutManager)</code></a> ，
<a href="../../java/awt/Container.html#validate--"><code>Container.validate()</code></a>
</dd>
</dl> </li>
</ul> <a name="getAccessibleContext--">
<!-- --> </a>
<ul class="blockListLast">
<li class="blockList"> <h4>getAccessibleContext</h4> <pre>public <a href="../../javax/accessibility/AccessibleContext.html" title="class in javax.accessibility">AccessibleContext</a> getAccessibleContext()</pre>
<div class="block">
获取与此
<code>JLayer</code> 。
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../javax/accessibility/Accessible.html#getAccessibleContext--">getAccessibleContext</a></code>在接口
<code><a href="../../javax/accessibility/Accessible.html" title="interface in javax.accessibility">Accessible</a></code>
</dd>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../java/awt/Component.html#getAccessibleContext--">getAccessibleContext</a></code>在
<code><a href="../../java/awt/Component.html" title="class in java.awt">Component</a></code>类
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
与此
<code>JLayer</code> 。
</dd>
</dl> </li>
</ul> </li>
</ul> </li>
</ul>
</div>
</div>
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