对enableEvents类的应用

实现代码如下：
MyButton.java文件代码：

import java.awt.*;import java.awt.event.*;public class MyButton extends Button {    private MyButton friend = null;    public MyButton(String title) {        // TODO Auto-generated constructor stub        super(title);        enableEvents(AWTEvent.MOUSE_MOTION_EVENT_MASK);    }    public void setFriend(MyButton friend) {        this.friend = friend;    }    protected void processMouseMotionEvent(MouseEvent e) {        setVisible(false);        friend.setVisible(true);    }}

TestMyButton.java文件里的代码：

import java.awt.*;import java.awt.event.*;public class TestMyButton extends Frame {    public TestMyButton() {        addWindowListener(new WindowAdapter() {            public void windowClosing(WindowEvent e) {                dispose();                System.exit(0);            }        });    }    public static void main(String[] args) {        // TODO Auto-generated method stub        System.out.println("Starting TestMyButton...");        TestMyButton mainFrame = new TestMyButton();        MyButton btn1 = new MyButton("你来抓我呀！");        MyButton btn2 = new MyButton("你来抓我呀！");        btn1.setFriend(btn2);        btn2.setFriend(btn1);        mainFrame.add(btn1, "North");        mainFrame.add(btn2, "South");        mainFrame.setSize(400, 400);        mainFrame.setTitle("TestButton");        mainFrame.setVisible(true);        btn2.setVisible(false);    }}

控制台运行结果：

窗口的运行结果：