例三.txt

这是一本java基础教程 对新手上路有很大帮助

public class Example8_3{
    public static void main(String args[ ]){
        Left left=new Left();
        Right right=new Right();
        left.start();
        right.start();
        while(true){
          if(left.n==8||right.n==8)
             System.exit(0);
        }  
    }
}
class Left extends Thread{
    int n=0;
    public void run(){
        while(true){
            n++;
            System.out.printf("\n%s","我在左面写字");
            try {  sleep((int)(Math.random()*100)+100);
            }
            catch(InterruptedException e) {}
        }
    }
}
class Right extends Thread{
    int n=0;
    public void run(){
        while(true){
            n++;
            System.out.printf("\n%40s","我在右面写字");
            try {  sleep((int)(Math.random()*100)+100);
            }
            catch(InterruptedException e) {}
        }
    }
}