//用匿名类实现关闭窗口功能import java.awt.*;import java.awt.event.*;public class TestAnony {	Frame f = new Frame("Test");	TextField tf = new TextField(10);	Button b1 = new Button("Start");	public TestAnony() {		f.add(b1, BorderLayout.NORTH);		f.add(tf, BorderLayout.SOUTH);		b1.addActionListener(new ActionListener() {			private int i;			public void actionPerformed(ActionEvent e) {				tf.setText(e.getActionCommand() + ++i);			}		});		f.addWindowListener(new WindowAdapter() {			public void windowClosing(WindowEvent e) {				f.setVisible(false);				System.exit(0);			}		});		f.pack();		f.setVisible(true);	}	public static void main(String[] args) {		new TestAnony();	}}

//简单的画图程序//注意repaint()方法的使用import java.awt.*;import java.awt.event.*;import java.util.*;public class TestMyMouseAdater {	public static void main(String[] args) {		new MyFrame("Drawing ......");	}}class MyFrame extends Frame {	ArrayList
    
      points = null;	MyFrame(String s) {		super(s);		points = new ArrayList
     
      ();		setLayout(null);		setBounds(300, 300, 400, 400);		setBackground(new Color(204, 204, 255));		setVisible(true);		this.addMouseListener(new Monitor());		//this.addWindowListener(new MyWindowMonitor());		//匿名类写法：		this.addWindowListener(new WindowAdapter() {			public void windowClosing(WindowEvent e) {				setVisible(true);				System.exit(0);			}		});	}	//内部类	/*class MyWindowMonitor extends WindowAdapter {		public void windowClosing(WindowEvent e) {			setVisible(false);			System.exit(0);		}	}*/	public void paint(Graphics g) {		Iterator
      
        i = points.iterator();		while(i.hasNext()) {			Point p = i.next();			g.setColor(Color.blue);			g.fillOval(p.x, p.y, 10, 10);		}	}	public void addPoint(Point p) {		points.add(p);	}}class Monitor extends MouseAdapter {	public void mousePressed(MouseEvent e) {		MyFrame f = (MyFrame)e.getSource();		f.addPoint(new Point(e.getX(), e.getY()));		f.repaint();	}}