例子十一.txt

这是一本java基础教程 对新手上路有很大帮助

public class Example8_11{
    public static void main(String args[]){
        A target=new A();    //线程thread的目标对象 
        Thread thread=new Thread(target);
        thread.setName("张三");
        thread.start();
        while(target.getStop()==false){}
        System.out.println("我是主线程,负责恢复"+thread.getName()+"线程"); 
        target.restart();  //恢复thread线程
    }
} 
class A implements Runnable{
    int number=0;
    boolean stop=false;
    boolean getStop(){
            return stop;
    }
    public void run(){
        while(true){
            number++;
            System.out.println(Thread.currentThread().getName()+"的number="+number);
            if(number==3){
                try{  System.out.println(Thread.currentThread().getName()+"被挂起");
                     stop=true;
                     hangUP();//挂起线程
                     System.out.println(Thread.currentThread().getName()+"恢复执行");
                } 
                catch(Exception e){}  
            }
            try{ Thread.sleep(1000); 
            } 
           catch(Exception e){}
        }
    }
    public synchronized void  hangUP() throws InterruptedException{
        wait();  
    }
    public synchronized void  restart(){
        notifyAll();
    }
}