1 package hello; 2 import java.awt.*; 3 public class helloworld 4 { 5     public static void main(String[] args)throws Exception 6     { 7          new F().launchFrame(); 8     } 9 }10 11 class F extends Frame12 {13     public void launchFrame()14     {15         setBounds(200, 300, 600, 700);16         setVisible(true);17     }18     public void paint(Graphics g)        //Frame出现自动调用19     {20         Color c = g.getColor();        //获得原来的颜色21         g.setColor(Color.green);    //22         g.fillOval(50, 50, 30, 30);23         g.setColor(Color.ORANGE);24         g.fillRect(90, 90, 30, 30);25         g.setColor(c);            //恢复原来的颜色26     }27 }

 1 package hello; 2 import java.awt.*; 3 import java.awt.event.*; 4 import java.util.*; 5 public class helloworld 6 { 7     public static void main(String[] args)throws Exception 8     { 9          new F("wori");10     }11 }12 13 class F extends Frame 14 {15     ArrayList al = new ArrayList();                //存放鼠标点的点16     public F(String s)17     {18         super(s);19         setLayout(null);20         setBounds(200, 300, 600, 700);21         setVisible(true);22         this.addMouseListener(new M());            //监听鼠标23         24     }25     public void paint(Graphics g)26     {27         Iterator i = al.iterator();            //28         Color c = g.getColor();29         g.setColor(Color.CYAN);30         while(i.hasNext())31         {32             Point p = (Point)i.next();33             g.fillOval(p.x, p.y, 10, 10);34         }35                 36     }37     void addPoint(int a, int b)38     {39         al.add(new Point(a, b));40     }41     class M extends MouseAdapter                //MouseAdapter是MouseListener的子类42     {43         public void mousePressed(MouseEvent e)44         {45             F f = (F)e.getSource();            //getSource()是获得监听的对象46             addPoint(e.getX(), e.getY());        //47             f.repaint();                //刷新图像48             49         }50     }51 }

 1 package hello; 2 import java.awt.*; 3 import java.awt.event.*; 4 import java.util.*; 5 public class helloworld 6 { 7     public static void main(String[] args)throws Exception 8     { 9          Frame f = new Frame("wocao");10         11          f.setLayout(null);12          f.setBounds(300, 300, 300, 300);13          f.addWindowListener(new WL());14          f.setVisible(true);15     }16     17 }18 19 class WL extends WindowAdapter20 {21     public void windowClosing(WindowEvent e)22     {23         24         ((Frame)e.getSource()).setVisible(false);        //注意（）一定要套(Frame)e.getSource().setVisible(false);不行    ***25         System.exit(0);                        //0是正常退出26     }27 }

 1 package hello; 2 import java.awt.*; 3 import java.awt.event.*; 4 import java.util.*; 5 public class helloworld 6 { 7     public static void main(String[] args)throws Exception 8     { 9          Frame f = new Frame("wocao");10         11          f.addKeyListener(new Kl());                //不能加TextField，加了输入进文本框，就不是Frame的事件了12          f.addWindowListener(new Wl());13          f.pack();14          f.setVisible(true);15     }16 17 }18 19 20 class Kl extends KeyAdapter21 {22     public void keyTyped(KeyEvent e)23     {24         int c = e.getKeyCode();25 26             System.out.println(c + " is typed");27         28     }29 }30 31 32 class Wl extends WindowAdapter33 {34     public void windowClosing(WindowEvent e)35     {36         ((Frame)e.getSource()).setVisible(false);37         System.exit(0);38     }39 }