线程终止的方法

学习心得

线程终止的3种方法：stop(),interrupt(),使用标志位。

总结

1.stop()方法会直接杀死线程不论执行到哪里，破坏了线程的安全性，已停止使用。

public class StopThread extends Thread{
    public int i=0;
    public int j=0;
    @Override
    public void run(){
        i++;
        try {
            Thread.sleep(10000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        j++;
    }
    public static void main(String[] args) throws InterruptedException {
        StopThread stopThread = new StopThread();
        stopThread.start();
        Thread.sleep(1000);		//进入线程，执行i++
        stopThread.stop();    //立即打断线程
        //stopThread.interrupt();     //打断wait(),join(),sleep(),继续执行其他
        while (stopThread.isAlive()){

        }
        System.out.println(stopThread.i+"***"+stopThread.j);	//输出 1***0
    }
}

2.interrupt()方法会打断当前等待或阻塞状态使线程继续执行，直至线程结束。

public class StopThread extends Thread{
    public int i=0;
    public int j=0;
    @Override
    public void run(){
        i++;
        try {
            Thread.sleep(10000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        j++;
    }
    public static void main(String[] args) throws InterruptedException {
        StopThread stopThread = new StopThread();
        stopThread.start();
        Thread.sleep(1000);		//进入线程，执行i++
        //stopThread.stop();    //立即打断线程
        stopThread.interrupt();     //打断wait(),join(),sleep(),继续执行其他
        while (stopThread.isAlive()){

        }
        System.out.println(stopThread.i+"***"+stopThread.j);	//输出 1***1,并抛出异常。
    }
}

3.增加标志位方法，标志位需使用voliate关键字修饰，保证多线程之间的可见性。

public class StopThread extends Thread{
    public int i=0;
    public int j=0;
    public static voliate boolean falg = true;	//volicate保证多线程可见性
    @Override
    public void run(){
        while(flag){
            i++;
            try {
                Thread.sleep(10000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            j++;
        }
    }
    public static void main(String[] args) throws InterruptedException {
        StopThread stopThread = new StopThread();
        stopThread.start();
        Thread.sleep(1000);		//进入线程，执行i++
        stopThread.falg = false;
        while (stopThread.isAlive()){

        }
        System.out.println(stopThread.i+"***"+stopThread.j);	//输出 1***1
    }
}