java 停止线程

stop()已经过时.

停止线程:run()方法结束。

开启多线程运行,通常代码都是循环结构。

只要控制住循环,就可以让run()结束,也就结束了线程。

class StopThread implements Runnable {
    private boolean flag = true;

    @Override
    public void run() {
        while (flag) {
            System.out.println(Thread.currentThread().getName() + "...run");
        }
    }

    public void changeFlag() {
        flag = false;
    }
}

public class StopThreadDemo {
    public static void main(String[] args) {
        StopThread st = new StopThread();
        Thread t1 = new Thread(st);
        Thread t2 = new Thread(st);
        t1.start();
        t2.start();
        int num = 0;
        while (true) {
            if (num++ == 60) {
                st.changeFlag();
                break;
            }
            System.out.println(Thread.currentThread().getName() + "......" + num);
        }
    }
}

 

特殊情况:当线程处于冻结状态就不会读取到标记,那么线程也就不会结束。

当没有指定的方式让冻结的线程恢复到运行状态时,这时需要对冻结进行清除,强制让线程恢复到运行状态中来,这样就可以操作标记让线程结束。

Thread类中提供了该方法:interrupt();

class StopThread implements Runnable {
    private boolean flag = true;

    @Override
    public synchronized void run() {
        while (flag) {
            try {
                wait();
            } catch (InterruptedException e) {
                System.out.println(Thread.currentThread().getName() + "...Exception");
                flag = false;
            }
            System.out.println(Thread.currentThread().getName() + "...run");
        }
    }

    public void changeFlag() {
        flag = false;
    }
}

public class StopThreadDemo {
    public static void main(String[] args) {
        StopThread st = new StopThread();
        Thread t1 = new Thread(st);
        Thread t2 = new Thread(st);
        t1.start();
        t2.start();
        int num = 0;
        while (true) {
            if (num++ == 60) {
//                st.changeFlag();
                t1.interrupt();
                t2.interrupt();
                break;
            }
            System.out.println(Thread.currentThread().getName() + "......" + num);
        }
        System.out.println("over");
    }
}

 

posted @ 2020-04-01 13:29  hongxiao2020  阅读(475)  评论(0编辑  收藏  举报