按钮关闭页面

import java.awt.Frame;import java.awt.TextArea;import java.awt.event.WindowEvent;import java.awt.event.WindowListener;public class TestFrame {private Frame f= new Frame("test");private TextArea ta= new TextArea(6,40);public void init(){f.add(ta);f.addWindowListener(new MyListener());f.pack();f.setVisible(true);}public class MyListener implements WindowListener {public void windowActivated(WindowEvent e) {// TODO Auto-generated method stubta.append("激活");}public void windowClosed(WindowEvent e) {// TODO Auto-generated method stubta.append("关了");}public void windowClosing(WindowEvent e) {ta.append("再关着呢");System.exit(0);// TODO Auto-generated method stub}public void windowDeactivated(WindowEvent e) {// TODO Auto-generated method stub}public void windowDeiconified(WindowEvent e) {// TODO Auto-generated method stub}public void windowIconified(WindowEvent e) {// TODO Auto-generated method stub}public void windowOpened(WindowEvent e) {// TODO Auto-generated method stub}}public static void main(String args[]){new TestFrame().init();}}