520写的小程序

package com.y;

import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.Random;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;

public class CatchButtonGameV1 extends JFrame {
    /**
     * 
     */
    private static final long serialVersionUID = -1273807998666343586L;
    /**
     * 
     */
    public JButton button=new JButton("显示");
    public JButton[] J = new JButton[11];
    public Random random = new Random();
    public int randomInt=random.nextInt(9);
    public CatchButtonGameV1() {
        this.setTitle("Catch me if you can!");
        this.getContentPane().setLayout(new GridLayout(3, 3));
        for (int i = 0; i < 11; i++) {
        J[i] = new JButton();
        J[i].addMouseListener(new M0l());
        add(J[i]);
        }
        J[randomInt].setText("不喜欢我！！！");
        
         pack();
        setSize(700, 700);
        setVisible(true);
    }
    
    public static void main(String[] args) {
        //new CatchButtonGameV1();
        CatchButtonGameV1 s=new CatchButtonGameV1();
        s.ShowDIalog();
    }
    //mouse click listen
     public JButton temp2 = new JButton("喜欢我！！");
     public void ShowDIalog(){
        //setLayout(new FlowLayout());
        add(temp2);
        temp2.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e){
                JOptionPane.showMessageDialog(null,"嘻嘻，好开森");
            }
        });
        setVisible(true);
        setSize(600,600);
    }
    class M0l implements MouseListener {
    
        public void mouseClicked(MouseEvent e) {
            temp2 = (JButton) e.getSource();
            if(temp2.getText().equals("不喜欢我！！！")){
                temp2.setText("");
            }else{
                J[randomInt].setText("huhuilan");
            }
        }
        
        public void mousePressed(MouseEvent e) {
        }
        
        public void mouseReleased(MouseEvent e) {
        }
        
        public void mouseEntered(MouseEvent e) {//鼠标移动过
            JButton temp = (JButton) e.getSource();
            if (temp.getText().equals("不喜欢我！！！")) {
            temp.setText("");
            do {
            randomInt = random.nextInt(9);
            } while (temp == J[randomInt]);
            J[randomInt].setText("不喜欢我！！！");
            }
    }
    
    public void mouseExited(MouseEvent e) {
        }
    }
}