threadtest.java

本java源程序包括了大量的学习程序（共27章）方便大家学习

package thread;
import java.awt.*;

import javax.swing.*;

//实现Runnable接口
public class ThreadTest extends JFrame implements Runnable {
    private Thread thread1, thread2;           
    private int x1 = -100;
    private int x2 = -50;
    
    public ThreadTest(){
    	super("多线程");
		setSize(400,300);
		setBackground(Color.WHITE);            //设置背景色
		
		//创建两个线程
		thread1 = new Thread(this);
		thread2 = new Thread(this);
		
		//启动两个线程
		thread1.start();
		thread2.start();
		
		setVisible(true);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    
    public void paint(Graphics g){
    	Graphics2D comp2D = (Graphics2D)g;
        comp2D.setColor(getBackground());
        //清除画板
        comp2D.fillRect(0,0,getSize().width,getSize().height);
        
        //绘制矩形
        comp2D.setColor(Color.BLUE);
        comp2D.drawRect(x1, 100, 50, 50);
        
        //绘制圆形
        comp2D.setColor(Color.GREEN);
        comp2D.drawOval(x2, 200, 50, 50);
    	
    }
    //实现Runnable接口的方法run()
    public void run(){
    	while(true){
    		//如果当前线程为thread1则执行以下代码
    		if(Thread.currentThread() == thread1){
    			x1 += 6;
    			if(x1 >= 500)
    				x1 = -100;
    			repaint();
    			//线程thread1休眠100毫秒
    			pause(100);
    			//如果当前线程为thread2则执行以下代码
    		} else if(Thread.currentThread() == thread2){
    			x2 += 4;
    			if(x2 >= 500)
    				x2 = -50;
    			repaint();
    			//线程thread2休眠120毫秒
    			pause(120);
    		}
    	}
    }
    
    //设定线程休眠时间
    private void pause(int time) {
        try {
            Thread.sleep(time);
        } catch (InterruptedException e) { }
    }
    
	public static void main(String[] args) {
		ThreadTest test = new ThreadTest();
	}
}