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

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     javax.swing 
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<h2 class="title" title="Interface ComboBoxModel">Interface ComboBoxModel&lt;E&gt;</h2>
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<span class="paramLabel">参数类型</span>
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<code>E</code> - 这个模型的元素的类型 
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         All Superinterfaces: 
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<span><a href="../../javax/swing/ListModel.html" title="javax.swing中的接口">ListModel</a> &lt;E&gt;</span>
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         All Known Subinterfaces: 
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<span><a href="../../javax/swing/MutableComboBoxModel.html" title="javax.swing中的接口">MutableComboBoxModel</a> &lt;E&gt;</span>
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        所有已知实现类：
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<span><a href="../../javax/swing/DefaultComboBoxModel.html" title="javax.swing中的类">DefaultComboBoxModel</a> ， <a href="../../javax/swing/plaf/metal/MetalFileChooserUI.DirectoryComboBoxModel.html" title="javax.swing.plaf.metal中的类">MetalFileChooserUI.DirectoryComboBoxModel</a> ， <a href="../../javax/swing/plaf/metal/MetalFileChooserUI.FilterComboBoxModel.html" title="javax.swing.plaf.metal中的类">MetalFileChooserUI.FilterComboBoxModel</a></span>
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<hr/> <br/> <pre>public interface <span class="typeNameLabel">ComboBoxModel&lt;E&gt;</span>
extends <a href="../../javax/swing/ListModel.html" title="interface in javax.swing">ListModel</a>&lt;E&gt;</pre>
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<span>组合框的数据模型。</span>
<span>此界面扩展了<code>ListDataModel</code> ，并添加了<i>所选项目</i>的概念。</span>
<span>所选项目通常是组合框显示区域中可见的项目。</span>
<p> <span>所选项目可能不一定由底层的<code>ListModel</code>管理。</span> <span>这种不相交的行为允许在模型中临时存储和检索所选择的项目。</span> </p>
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<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="t3"><span><a href="javascript:show(4);">抽象方法</a></span><span class="tabEnd"> </span></span>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<td class="colFirst"><code><a href="../../java/lang/Object.html" title="class in java.lang">Object</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/ComboBoxModel.html#getSelectedItem--">getSelectedItem</a></span>()</code>
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              返回所选项目 
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/ComboBoxModel.html#setSelectedItem-java.lang.Object-">setSelectedItem</a></span>(<a href="../../java/lang/Object.html" title="class in java.lang">Object</a> anItem)</code>
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              设置所选项目。 
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<!-- --> </a> <h3>Methods inherited from interface javax.swing.<a href="../../javax/swing/ListModel.html" title="interface in javax.swing">ListModel</a></h3> <code><a href="../../javax/swing/ListModel.html#addListDataListener-javax.swing.event.ListDataListener-">addListDataListener</a>, <a href="../../javax/swing/ListModel.html#getElementAt-int-">getElementAt</a>, <a href="../../javax/swing/ListModel.html#getSize--">getSize</a>, <a href="../../javax/swing/ListModel.html#removeListDataListener-javax.swing.event.ListDataListener-">removeListDataListener</a></code></li>
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<li class="blockList"> <h4>setSelectedItem</h4> <pre>void setSelectedItem(<a href="../../java/lang/Object.html" title="class in java.lang">Object</a> anItem)</pre>
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<span>设置所选项目。</span>
<span>这种方法的实现应该通知所有注册的内容已经改变了<code>ListDataListener</code> 。</span>
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<span class="paramLabel">参数</span>
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<code>anItem</code> - 要选择的列表对象或 
            <code>null</code>以清除选择 
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<li class="blockList"> <h4>getSelectedItem</h4> <pre><a href="../../java/lang/Object.html" title="class in java.lang">Object</a> getSelectedItem()</pre>
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            返回所选项目 
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<span class="returnLabel">结果</span>
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             所选项目或 
            <code>null</code>如果没有选择 
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