uTools-Manuals/docs/java/javax/swing/RepaintManager.html

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     javax.swing 
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<h2 class="title" title="Class RepaintManager">Class RepaintManager</h2>
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<li><a href="../../java/lang/Object.html" title="class in java.lang">java.lang.Object</a></li>
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<hr/> <br/> <pre>public class <span class="typeNameLabel">RepaintManager</span>
extends <a href="../../java/lang/Object.html" title="class in java.lang">Object</a></pre>
<div class="block">
<span>此类管理重绘请求，允许重绘的数量最小化，例如通过将多个请求压缩为组件树成员的单个重绘。</span>
<p> <span>由于1.6 <code>RepaintManager</code>手柄重绘了Swing的顶层组件（请求<code>JApplet</code> ， <code>JWindow</code> ， <code>JFrame</code>和<code>JDialog</code> ）。</span> <span>对其中一个的任何电话<code>repaint</code>将调用适当的<code>addDirtyRegion</code>方法。</span> </p>
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<span>构造方法</span>
<span class="tabEnd"> </span>
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<tbody>
<tr>
<th class="colOne" scope="col">Constructor and Description</th>
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<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../javax/swing/RepaintManager.html#RepaintManager--">RepaintManager</a></span>()</code>
<div class="block">
              创建一个新的RepaintManager实例。 
            </div> </td>
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<caption>
<span class="activeTableTab" id="t0"><span>所有方法</span><span class="tabEnd"> </span></span>
<span class="tableTab" id="t1"><span><a href="javascript:show(1);">静态方法</a></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>
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<tbody>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/RepaintManager.html#addDirtyRegion-java.applet.Applet-int-int-int-int-">addDirtyRegion</a></span>(<a href="../../java/applet/Applet.html" title="class in java.applet">Applet</a> applet, int x, int y, int w, int h)</code>
<div class="block">
              添加 
             <code>applet</code>到列表 
             <code>Component</code> s表示需要重新绘制。 
            </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/RepaintManager.html#addDirtyRegion-javax.swing.JComponent-int-int-int-int-">addDirtyRegion</a></span>(<a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a> c, int x, int y, int w, int h)</code>
<div class="block">
              在要刷新的组件列表中添加一个组件。 
            </div> </td>
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<tr class="altColor" id="i2">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/RepaintManager.html#addDirtyRegion-java.awt.Window-int-int-int-int-">addDirtyRegion</a></span>(<a href="../../java/awt/Window.html" title="class in java.awt">Window</a> window, int x, int y, int w, int h)</code>
<div class="block">
              添加 
             <code>window</code>到列表 
             <code>Component</code> s表示需要重新绘制。 
            </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/RepaintManager.html#addInvalidComponent-javax.swing.JComponent-">addInvalidComponent</a></span>(<a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a> invalidComponent)</code>
<div class="block">
              将组件标记为需要布局，并为事件分派线程队列运行，该线程将首先验证组件isValidateRoot（）祖先。 
            </div> </td>
</tr>
<tr class="altColor" id="i4">
<td class="colFirst"><code>static <a href="../../javax/swing/RepaintManager.html" title="class in javax.swing">RepaintManager</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/RepaintManager.html#currentManager-java.awt.Component-">currentManager</a></span>(<a href="../../java/awt/Component.html" title="class in java.awt">Component</a> c)</code>
<div class="block">
              返回给定组件的调用线程的RepaintManager。 
            </div> </td>
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<tr class="rowColor" id="i5">
<td class="colFirst"><code>static <a href="../../javax/swing/RepaintManager.html" title="class in javax.swing">RepaintManager</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/RepaintManager.html#currentManager-javax.swing.JComponent-">currentManager</a></span>(<a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a> c)</code>
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              返回给指定JComponent的调用线程的RepaintManager。 
            </div> </td>
</tr>
<tr class="altColor" id="i6">
<td class="colFirst"><code><a href="../../java/awt/Rectangle.html" title="class in java.awt">Rectangle</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/RepaintManager.html#getDirtyRegion-javax.swing.JComponent-">getDirtyRegion</a></span>(<a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a> aComponent)</code>
<div class="block">
              返回组件当前的脏区域。 
            </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/RepaintManager.html#getDoubleBufferMaximumSize--">getDoubleBufferMaximumSize</a></span>()</code>
<div class="block">
              返回最大双缓冲区大小。 
            </div> </td>
</tr>
<tr class="altColor" id="i8">
<td class="colFirst"><code><a href="../../java/awt/Image.html" title="class in java.awt">Image</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/RepaintManager.html#getOffscreenBuffer-java.awt.Component-int-int-">getOffscreenBuffer</a></span>(<a href="../../java/awt/Component.html" title="class in java.awt">Component</a> c, int proposedWidth, int proposedHeight)</code>
<div class="block">
              使用组件c返回应用作双缓冲区的屏幕外 
             <code>c</code> 。 
            </div> </td>
</tr>
<tr class="rowColor" id="i9">
<td class="colFirst"><code><a href="../../java/awt/Image.html" title="class in java.awt">Image</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/RepaintManager.html#getVolatileOffscreenBuffer-java.awt.Component-int-int-">getVolatileOffscreenBuffer</a></span>(<a href="../../java/awt/Component.html" title="class in java.awt">Component</a> c, int proposedWidth, int proposedHeight)</code>
<div class="block">
              返回应该被用作具有指定成分的双缓冲器挥发性离屏缓冲区 
             <code>c</code> 。 
            </div> </td>
</tr>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/RepaintManager.html#isCompletelyDirty-javax.swing.JComponent-">isCompletelyDirty</a></span>(<a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a> aComponent)</code>
<div class="block">
              如果 
             <b>aComponent</b>在下一个paintDirtyRegions（）中将被完全绘制，则返回true的方便方法。 
            </div> </td>
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<tr class="rowColor" id="i11">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/RepaintManager.html#isDoubleBufferingEnabled--">isDoubleBufferingEnabled</a></span>()</code>
<div class="block">
              如果此RepaintManager是双缓冲的，则返回true。 
            </div> </td>
</tr>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/RepaintManager.html#markCompletelyClean-javax.swing.JComponent-">markCompletelyClean</a></span>(<a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a> aComponent)</code>
<div class="block">
              标记一个组件完全干净。 
            </div> </td>
</tr>
<tr class="rowColor" id="i13">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/RepaintManager.html#markCompletelyDirty-javax.swing.JComponent-">markCompletelyDirty</a></span>(<a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a> aComponent)</code>
<div class="block">
              标记一个组件完全脏了 
            </div> </td>
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<tr class="altColor" id="i14">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/RepaintManager.html#paintDirtyRegions--">paintDirtyRegions</a></span>()</code>
<div class="block">
              绘制所有被标记为脏的组件。 
            </div> </td>
</tr>
<tr class="rowColor" id="i15">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/RepaintManager.html#removeInvalidComponent-javax.swing.JComponent-">removeInvalidComponent</a></span>(<a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a> component)</code>
<div class="block">
              从无效组件列表中删除组件。 
            </div> </td>
</tr>
<tr class="altColor" id="i16">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/RepaintManager.html#setCurrentManager-javax.swing.RepaintManager-">setCurrentManager</a></span>(<a href="../../javax/swing/RepaintManager.html" title="class in javax.swing">RepaintManager</a> aRepaintManager)</code>
<div class="block">
              设置应该用于调用线程的RepaintManager。 
            </div> </td>
</tr>
<tr class="rowColor" id="i17">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/RepaintManager.html#setDoubleBufferingEnabled-boolean-">setDoubleBufferingEnabled</a></span>(boolean aFlag)</code>
<div class="block">
              在此RepaintManager中启用或禁用双缓冲。 
            </div> </td>
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<tr class="altColor" id="i18">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/RepaintManager.html#setDoubleBufferMaximumSize-java.awt.Dimension-">setDoubleBufferMaximumSize</a></span>(<a href="../../java/awt/Dimension.html" title="class in java.awt">Dimension</a> d)</code>
<div class="block">
              设置最大双缓冲区大小。 
            </div> </td>
</tr>
<tr class="rowColor" id="i19">
<td class="colFirst"><code><a href="../../java/lang/String.html" title="class in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/RepaintManager.html#toString--">toString</a></span>()</code>
<div class="block">
              返回显示和标识此对象属性的字符串。 
            </div> </td>
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<tr class="altColor" id="i20">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/RepaintManager.html#validateInvalidComponents--">validateInvalidComponents</a></span>()</code>
<div class="block">
              验证已标记为无效的所有组件。 
            </div> </td>
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<li class="blockList"> <h4>RepaintManager</h4> <pre>public RepaintManager()</pre>
<div class="block">
<span>创建一个新的RepaintManager实例。</span>
<span>你很少会调用这个构造函数。</span>
<span>直。</span>
<span>要获取默认的RepaintManager，请使用RepaintManager.currentManager（JComponent）（通常为“this”）。</span>
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<li class="blockList"> <h4>currentManager</h4> <pre>public static <a href="../../javax/swing/RepaintManager.html" title="class in javax.swing">RepaintManager</a> currentManager(<a href="../../java/awt/Component.html" title="class in java.awt">Component</a> c)</pre>
<div class="block">
            返回给定组件的调用线程的RepaintManager。 
          </div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>c</code> - 默认实现中未使用的组件，但可以被覆盖版本使用，以根据组件返回不同的RepaintManager 
           </dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             RepaintManager对象 
           </dd>
</dl> </li>
</ul> <a name="currentManager-javax.swing.JComponent-">
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<li class="blockList"> <h4>currentManager</h4> <pre>public static <a href="../../javax/swing/RepaintManager.html" title="class in javax.swing">RepaintManager</a> currentManager(<a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a> c)</pre>
<div class="block">
<span>返回给指定JComponent的调用线程的RepaintManager。</span>
<p> <span>注意：此方法存在与早期版本的Swing库的向后二进制兼容性。</span> <span>它只是返回<a href="../../javax/swing/RepaintManager.html#currentManager-java.awt.Component-"><code>currentManager(Component)</code></a>返回的结果。</span> </p>
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<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>c</code> - 一个JComponent - 未使用 
           </dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             RepaintManager对象 
           </dd>
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<li class="blockList"> <h4>setCurrentManager</h4> <pre>public static void setCurrentManager(<a href="../../javax/swing/RepaintManager.html" title="class in javax.swing">RepaintManager</a> aRepaintManager)</pre>
<div class="block">
<span>设置应该用于调用线程的RepaintManager。</span>
<span><b>aRepaintManager</b>将成为调用线程的线程组的当前RepaintManager。</span>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>aRepaintManager</code> - 要使用的RepaintManager对象 
           </dd>
</dl> </li>
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<li class="blockList"> <h4>addInvalidComponent</h4> <pre>public void addInvalidComponent(<a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a> invalidComponent)</pre>
<div class="block">
            将组件标记为需要布局，并为事件分派线程队列运行，该线程将首先验证组件isValidateRoot（）祖先。 
          </div>
<dl>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../javax/swing/JComponent.html#isValidateRoot--"><code>JComponent.isValidateRoot()</code></a> ， 
            <a href="../../javax/swing/RepaintManager.html#removeInvalidComponent-javax.swing.JComponent-"><code>removeInvalidComponent(javax.swing.JComponent)</code></a>
</dd>
</dl> </li>
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<li class="blockList"> <h4>removeInvalidComponent</h4> <pre>public void removeInvalidComponent(<a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a> component)</pre>
<div class="block">
            从无效组件列表中删除组件。 
          </div>
<dl>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../javax/swing/RepaintManager.html#addInvalidComponent-javax.swing.JComponent-"><code>addInvalidComponent(javax.swing.JComponent)</code></a>
</dd>
</dl> </li>
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<li class="blockList"> <h4>addDirtyRegion</h4> <pre>public void addDirtyRegion(<a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a> c,
                           int x,
                           int y,
                           int w,
                           int h)</pre>
<div class="block">
<span>在要刷新的组件列表中添加一个组件。</span>
<span>如果<i>c</i>已经有一个脏区域，矩形<i>（x，y，w，h）</i>将与应该被重新绘制的区域相联。</span>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>c</code> - 要重新绘制的组件，null不会发生任何事情。 
           </dd>
<dd>
<code>x</code> - 要重新绘制的区域的X坐标 
           </dd>
<dd>
<code>y</code> - 重新绘制区域的Y坐标 
           </dd>
<dd>
<code>w</code> - 要重新绘制的区域的宽度 
           </dd>
<dd>
<code>h</code> - 重新绘制区域的高度 
           </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>
</dd>
</dl> </li>
</ul> <a name="addDirtyRegion-java.awt.Window-int-int-int-int-">
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<ul class="blockList">
<li class="blockList"> <h4>addDirtyRegion</h4> <pre>public void addDirtyRegion(<a href="../../java/awt/Window.html" title="class in java.awt">Window</a> window,
                           int x,
                           int y,
                           int w,
                           int h)</pre>
<div class="block">
            添加 
           <code>window</code>到列表 
           <code>Component</code> s表示需要重新绘制。 
          </div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>window</code> - 要重绘的窗口，null无效。 
           </dd>
<dd>
<code>x</code> - 要重新绘制的区域的X坐标 
           </dd>
<dd>
<code>y</code> - 重新绘制区域的Y坐标 
           </dd>
<dd>
<code>w</code> - 要重新绘制的区域的宽度 
           </dd>
<dd>
<code>h</code> - 重新绘制区域的高度 
           </dd>
<dt>
<span class="simpleTagLabel">从以下版本开始：</span>
</dt>
<dd>
             1.6 
           </dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../javax/swing/JFrame.html#repaint-long-int-int-int-int-"><code>JFrame.repaint(long, int, int, int, int)</code></a> ， 
            <a href="../../javax/swing/JWindow.html#repaint-long-int-int-int-int-"><code>JWindow.repaint(long, int, int, int, int)</code></a> ， 
            <a href="../../javax/swing/JDialog.html#repaint-long-int-int-int-int-"><code>JDialog.repaint(long, int, int, int, int)</code></a>
</dd>
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<li class="blockList"> <h4>addDirtyRegion</h4> <pre>public void addDirtyRegion(<a href="../../java/applet/Applet.html" title="class in java.applet">Applet</a> applet,
                           int x,
                           int y,
                           int w,
                           int h)</pre>
<div class="block">
            添加 
           <code>applet</code>到列表 
           <code>Component</code> s表示需要重新绘制。 
          </div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>applet</code> - Applet要重绘，null没有发生任何事情。 
           </dd>
<dd>
<code>x</code> - 要重新绘制的区域的X坐标 
           </dd>
<dd>
<code>y</code> - 重新绘制区域的Y坐标 
           </dd>
<dd>
<code>w</code> - 要重新绘制的区域的宽度 
           </dd>
<dd>
<code>h</code> - 重新绘制区域的高度 
           </dd>
<dt>
<span class="simpleTagLabel">从以下版本开始：</span>
</dt>
<dd>
             1.6 
           </dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../javax/swing/JApplet.html#repaint-long-int-int-int-int-"><code>JApplet.repaint(long, int, int, int, int)</code></a>
</dd>
</dl> </li>
</ul> <a name="getDirtyRegion-javax.swing.JComponent-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>getDirtyRegion</h4> <pre>public <a href="../../java/awt/Rectangle.html" title="class in java.awt">Rectangle</a> getDirtyRegion(<a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a> aComponent)</pre>
<div class="block">
<span>返回组件当前的脏区域。</span>
<span>如果组件不脏，返回空矩形。</span>
</div> </li>
</ul> <a name="markCompletelyDirty-javax.swing.JComponent-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>markCompletelyDirty</h4> <pre>public void markCompletelyDirty(<a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a> aComponent)</pre>
<div class="block">
<span>标记一个组件完全脏了</span>
<span><b>aComponent</b>将在下一个paintDirtyRegions（）调用期间完全绘制。</span>
</div> </li>
</ul> <a name="markCompletelyClean-javax.swing.JComponent-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>markCompletelyClean</h4> <pre>public void markCompletelyClean(<a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a> aComponent)</pre>
<div class="block">
<span>标记一个组件完全干净。</span>
<span>在下一个paintDirtyRegions（）调用中， <b>aComponent</b>不会被绘制。</span>
</div> </li>
</ul> <a name="isCompletelyDirty-javax.swing.JComponent-">
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<ul class="blockList">
<li class="blockList"> <h4>isCompletelyDirty</h4> <pre>public boolean isCompletelyDirty(<a href="../../javax/swing/JComponent.html" title="class in javax.swing">JComponent</a> aComponent)</pre>
<div class="block">
<span>如果<b>aComponent</b>在下一个paintDirtyRegions（）中将被完全绘制，则返回true的方便方法。</span>
<span>如果计算脏区域对于您的组件来说是昂贵的，请使用此方法，如果返回true则避免计算脏区域。</span>
</div> </li>
</ul> <a name="validateInvalidComponents--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>validateInvalidComponents</h4> <pre>public void validateInvalidComponents()</pre>
<div class="block">
            验证已标记为无效的所有组件。 
          </div>
<dl>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../javax/swing/RepaintManager.html#addInvalidComponent-javax.swing.JComponent-"><code>addInvalidComponent(javax.swing.JComponent)</code></a>
</dd>
</dl> </li>
</ul> <a name="paintDirtyRegions--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>paintDirtyRegions</h4> <pre>public void paintDirtyRegions()</pre>
<div class="block">
            绘制所有被标记为脏的组件。 
          </div>
<dl>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../javax/swing/RepaintManager.html#addDirtyRegion-javax.swing.JComponent-int-int-int-int-"><code>addDirtyRegion(javax.swing.JComponent, int, int, int, int)</code></a>
</dd>
</dl> </li>
</ul> <a name="toString--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>toString</h4> <pre>public <a href="../../java/lang/String.html" title="class in java.lang">String</a> toString()</pre>
<div class="block">
            返回显示和标识此对象属性的字符串。 
          </div>
<dl>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../java/lang/Object.html#toString--">toString</a></code>在 
            <code><a href="../../java/lang/Object.html" title="class in java.lang">Object</a></code>
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             该对象的字符串表示形式 
           </dd>
</dl> </li>
</ul> <a name="getOffscreenBuffer-java.awt.Component-int-int-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>getOffscreenBuffer</h4> <pre>public <a href="../../java/awt/Image.html" title="class in java.awt">Image</a> getOffscreenBuffer(<a href="../../java/awt/Component.html" title="class in java.awt">Component</a> c,
                                int proposedWidth,
                                int proposedHeight)</pre>
<div class="block">
<span>返回应使用组件<code>c</code>作为双缓冲区的屏幕外<code>c</code> 。</span>
<span>默认情况下，每个RepaintManager都有一个双缓冲区。</span>
<span>缓冲区可能小于<code>(proposedWidth,proposedHeight)</code>这是为接收重绘管理器设置的最大双缓冲区大小发生的。</span>
</div> </li>
</ul> <a name="getVolatileOffscreenBuffer-java.awt.Component-int-int-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>getVolatileOffscreenBuffer</h4> <pre>public <a href="../../java/awt/Image.html" title="class in java.awt">Image</a> getVolatileOffscreenBuffer(<a href="../../java/awt/Component.html" title="class in java.awt">Component</a> c,
                                        int proposedWidth,
                                        int proposedHeight)</pre>
<div class="block">
<span>返回应该被用作具有指定成分的双缓冲器挥发性离屏缓冲区<code>c</code> 。</span>
<span>返回的图像将是VolatileImage的实例，如果无法实例化VolatileImage对象，则返回null。</span>
<span>此缓冲区可能小于<code>(proposedWidth,proposedHeight)</code> 。</span>
<span>当为此重新绘制管理器设置最大双缓冲区大小时，会发生这种情况。</span>
</div>
<dl>
<dt>
<span class="simpleTagLabel">从以下版本开始：</span>
</dt>
<dd>
             1.4 
           </dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<span><a href="../../java/awt/image/VolatileImage.html" title="java.awt.image中的类"><code>VolatileImage</code></a></span>
</dd>
</dl> </li>
</ul> <a name="setDoubleBufferMaximumSize-java.awt.Dimension-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>setDoubleBufferMaximumSize</h4> <pre>public void setDoubleBufferMaximumSize(<a href="../../java/awt/Dimension.html" title="class in java.awt">Dimension</a> d)</pre>
<div class="block">
            设置最大双缓冲区大小。 
          </div> </li>
</ul> <a name="getDoubleBufferMaximumSize--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>getDoubleBufferMaximumSize</h4> <pre>public <a href="../../java/awt/Dimension.html" title="class in java.awt">Dimension</a> getDoubleBufferMaximumSize()</pre>
<div class="block">
            返回最大双缓冲区大小。 
          </div>
<dl>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             表示最大尺寸的Dimension对象 
           </dd>
</dl> </li>
</ul> <a name="setDoubleBufferingEnabled-boolean-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>setDoubleBufferingEnabled</h4> <pre>public void setDoubleBufferingEnabled(boolean aFlag)</pre>
<div class="block">
<span>在此RepaintManager中启用或禁用双缓冲。</span>
<span>小心：该属性的默认值设置为在给定平台上获得最佳涂料性能，不建议程序直接修改此属性。</span>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>aFlag</code> - true激活双缓冲 
           </dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../javax/swing/RepaintManager.html#isDoubleBufferingEnabled--"><code>isDoubleBufferingEnabled()</code></a>
</dd>
</dl> </li>
</ul> <a name="isDoubleBufferingEnabled--">
<!-- --> </a>
<ul class="blockListLast">
<li class="blockList"> <h4>isDoubleBufferingEnabled</h4> <pre>public boolean isDoubleBufferingEnabled()</pre>
<div class="block">
<span>如果此RepaintManager是双缓冲的，则返回true。</span>
<span>此属性的默认值可能因平台而异。</span>
<span>在AWT中支持原生双缓存的平台上，默认值为<code>false</code> ，以避免Swing中不必要的缓冲。</span>
<span>在不支持原生双缓存的平台上，默认值为<code>true</code> 。</span>
</div>
<dl>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             如果此对象是双缓冲的，则为true 
           </dd>
</dl> </li>
</ul> </li>
</ul> </li>
</ul>
</div>
</div>