10例子26.txt

这是一本java基础教程 对新手上路有很大帮助

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Example10_26{
    public static void main(String args[]){
        new ThreadWin();
    }
}
class ThreadWin extends JFrame implements Runnable,ActionListener{
    Thread moveOrStop;
    JButton start,hang,resume,die;
    JLabel moveLabel;
    boolean move=false,dead=false;
    ThreadWin(){
        moveOrStop=new Thread(this);
        start=new JButton("线程开始");
        hang=new JButton("线程挂起");
        resume=new JButton("线程恢复");
        die=new JButton("线程终止");
        start.addActionListener(this);
        hang.addActionListener(this);
        resume.addActionListener(this);
        die.addActionListener(this);
       moveLabel=new JLabel("线程负责运动我");
       moveLabel.setBackground(Color.red);
       setLayout(new FlowLayout());
       add(start);
       add(hang);
       add(resume);
       add(die);
       add(moveLabel);
       setSize(500,500);
       setVisible(true);
       setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    public void actionPerformed(ActionEvent e){
       if(e.getSource()==start){
          try {  move=true;
               moveOrStop.start();      //启动线程
          }
          catch(Exception event){}
       }
       else if(e.getSource()==hang)
          move=false;
       else if(e.getSource()==resume){
          move=true;
          resumeThread();               //恢复线程
       }
       else if(e.getSource()==die)
          dead=true;
    }
    public void run(){
       while(true){
         while(!move){
             try{  hangThread();          //挂起线程
             }
             catch(InterruptedException e1){}
         }
         int x=moveLabel.getBounds().x;
         int y=moveLabel.getBounds().y;
         y=y+2;
         if(y>=200)  
             y=10;
         moveLabel.setLocation(x,y); 
         try{ moveOrStop.sleep(200); 
         }
         catch(InterruptedException e2){}
         if(dead==true)
             return;                     //终止线程
       }
    }
    public synchronized void hangThread() throws InterruptedException{
       wait();  
    }
    public synchronized void  resumeThread(){
       notifyAll();
    }
}