40

package test_18;

import java.awt.*;
import java.awt.event.*;

class MyfirstWindowListener implements WindowListener
{
public void windowClosing(WindowEvent e)
{
System.out.println("我退出了！");
e.getWindow().setVisible(false); //变为不显示
((Window)e.getComponent()).dispose(); //释放窗口资源
System.exit(0); //结束虚拟系统运行
}
public void windowActivated(WindowEvent e){}
public void windowClosed(WindowEvent e){}
public void windowDeactivated(WindowEvent e){}
public void windowDeiconified(WindowEvent e){}
public void windowIconified(WindowEvent e){}
public void windowOpened(WindowEvent e){}
};

class MyButton extends Button
{
MyButton(String s){
super(s);
enableEvents(AWTEvent.ACTION_EVENT_MASK);
}
protected void processActionEvent(ActionEvent e){
System.out.println("按钮"+e.getActionCommand()+"按下！");
}
};

public class TestEvent
{
public static void main(String arg[])
{
Frame f = new Frame("TestEvent");
MyButton b = new MyButton("login");
f.setLayout(new FlowLayout(FlowLayout.CENTER));
f.setSize(460,250);
f.setLocation(420,240);
//b.setSize(4000,200);
f.add(b);
f.setBackground(Color.white);
f.setVisible(true);
f.addWindowListener(new MyfirstWindowListener());
//f.pack();
}
}