jcombobox button

JComboBox和JButton是Java Swing中的两种常用组件。JComboBox是一个下拉列表框，可以让用户从多个选项中选择一个，而JButton是一个按钮，用于触发特定的操作。

在你提供的引用中，JButton的单击事件代码如下：

JButton but = new JButton("按钮");
but.addActionListener(new ActionListener() {
    @Override
    public void actionPerformed(ActionEvent arg0) {
        System.out.println("===================");
    }
});

这段代码创建了一个名为"按钮"的JButton，并添加了一个ActionListener监听器。当按钮被点击时，会执行`actionPerformed`方法中的代码，即打印"==================="。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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