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
 2
 3
in thread main i =3000
 4
in thread main i =4000
 5
 6
 7
 8
 9
 10
 11
in thread main i =5000
in thread main i =6000
 12
 13
in thread main i =7000
in thread main i =8000
 14
 15
in thread main i =9000
 16
Thread main is over
 17

 

内存布局如图所示：