标签的移动与线程控制

来源：互联网发布：诸葛亮网络用语含义编辑：程序博客网时间：2024/04/30 12:56

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);   //创建移动标签的线程
        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();
    }
}