belgther
2011-07-24 05:30
通过JDK 6 Update 26（Windows 7 64位），以下示例代码仅获得一个事件：
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.setBounds(0, 0, 300, 400);
frame.setLayout(null);
final JTabbedPane tabbedPane = new JTabbedPane();
tabbedPane.addTab("One", new JPanel());
tabbedPane.addTab("Two", new JPanel());
tabbedPane.addTab("Three", new JPanel());
tabbedPane.addChangeListener(new ChangeListener() {
public void stateChanged(ChangeEvent e) {
System.out.println("Tab: " + tabbedPane.getSelectedIndex());
}
});
tabbedPane.setBounds(0, 0, 300, 400);
frame.add(tabbedPane);
frame.setVisible(true);
}
您能在调试器中弄清楚为什么监听器被触发了三遍吗？
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好吧，我很傻。添加的代码
ChangeListener在添加a的同一块中，Tab因此我在每个标签上添加了一个侦听器。