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| 15. 1. 14. 实现AWTEventListener |
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import java.awt.AWTEvent;
import java.awt.Toolkit;
import java.awt.event.AWTEventListener;
import java.awt.event.ActionEvent;
import java.awt.event.ComponentEvent;
import java.awt.event.WindowEvent;
import javax.swing.AbstractAction;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
public class Main implements AWTEventListener {
public void eventDispatched(AWTEvent evt) {
if (evt.getID() == WindowEvent.WINDOW_OPENED) {
ComponentEvent cev = (ComponentEvent) evt;
if (cev.getComponent() instanceof JFrame) {
System.out.println("event: " + evt);
JFrame frame = (JFrame) cev.getComponent();
loadSettings(frame);
}
}
}
public static void loadSettings(JFrame frame) {
System.out.println("loading");
}
public static void saveSettings() {
System.out.println("saving");
}
public static void main(String[] args) throws Exception {
Toolkit tk = Toolkit.getDefaultToolkit();
final Main main = new Main();
tk.addAWTEventListener(main, AWTEvent.WINDOW_EVENT_MASK);
final JFrame frame = new JFrame("");
frame.setName("your frame");
JMenuBar mb = new JMenuBar();
JMenu menu = new JMenu("File");
menu.add(new AbstractAction("Quit") {
public void actionPerformed(ActionEvent evt) {
try {
main.saveSettings();
System.exit(0);
} catch (Exception ex) {
System.out.println(ex);
}
}
});
mb.add(menu);
frame.setJMenuBar(mb);
frame.pack();
frame.setVisible(true);
}
}
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