>对于JMenu使用MenuListener
码
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class ActionExample {
public ActionExample() {
JMenu menu = new JMenu("Menu");
menu.setMnemonic(KeyEvent.VK_M);
menu.addMenuListener(new SampleMenuListener());
JMenu menu1 = new JMenu("Tool");
menu1.setMnemonic(KeyEvent.VK_T);
menu1.addMenuListener(new SampleMenuListener());
JFrame f = new JFrame("ActionExample");
JMenuBar mb = new JMenuBar();
mb.add(menu);
mb.add(menu1);
f.setJMenuBar(mb);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
ActionExample actionExample = new ActionExample();
}
});
}
}
class SampleMenuListener implements MenuListener {
@Override
public void menuSelected(MenuEvent e) {
System.out.println("menuSelected");
}
@Override
public void menuDeselected(MenuEvent e) {
System.out.println("menuDeselected");
}
@Override
public void menuCanceled(MenuEvent e) {
System.out.println("menuCanceled");
}
}
>对于JMenuItem仅使用ButtonModel