Java 线程(一)

interrupt () 可以终止线程,略显粗暴。(比起stop() 还是温柔一些 = = .orz )

介绍一种不用interrupt()终止线程的方法。

public class TestThread4{
    public static void main(String []args) {
        Runner4 r = new Runner4();    //创建实现了Runnable Interface的类的实例
        Thread t = new Thread(r);    //根据Thread Constructor ,传入Runnable 参数。此处有多态(父类引用指向子类,该处为接口类型指向实现接口的类,重写,实现)
        t.start();        //Thread.start()会自动调用传入Runnable Obj 的 run()   此语句,t 和 main 两个Thread 运行
        for(int i=0; i<10000; i++) {
            if(i % 1000 ==0 & i > 0){
                System.out.println("in thread main i =" + i);
            }
        }
        System.out.println("Thread main is over");
        r.shutDown();  //当main执行完后,调用实现Runnable Interface的shutDown()来终止Thread t 
    }
}

class Runner4 implements Runnable {
    private boolean flag = true;    
    public void run(){
        int i = 0;
        while(flag == true){    //run()运行的条件为flat == true , run()条件不满足,run()结束,Thread结束
            System.out.println(" " + i++);
        }
    }
    public void shutDown(){
        flag = false;    //修改boolean 使run()结束
    }
}

 

in thread main i =1000
 0
in thread main i =2000
 1
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in thread main i =3000
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in thread main i =4000
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in thread main i =5000
in thread main i =6000
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in thread main i =7000
in thread main i =8000
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in thread main i =9000
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Thread main is over
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View Code

 

内存布局如图所示:

 

posted @ 2018-04-17 12:46  LeafLay  阅读(89)  评论(0编辑  收藏  举报