java中线程中断interrupt

java中涉及线程中断主要有3个方法

1.interrupt()，在一个线程中调用另一个线程的interrupt()方法，即会向那个线程发出信号——线程中断状态已被设置。至于那个线程何去何从，由具体的代码实现决定。
2.isInterrupted()，用来判断当前线程的中断状态(true or false)，不会清除线程的中断状态。
3.interrupted()是个Thread的static方法，也会判断线程的中断状态，但是会清除线程的中断状态。

/**
     * Tests whether the current thread has been interrupted.  The
     * <i>interrupted status</i> of the thread is cleared by this method.  In
     * other words, if this method were to be called twice in succession, the
     * second call would return false (unless the current thread were
     * interrupted again, after the first call had cleared its interrupted
     * status and before the second call had examined it).
     *
     * <p>A thread interruption ignored because a thread was not alive
     * at the time of the interrupt will be reflected by this method
     * returning false.
     *
     * @return  <code>true</code> if the current thread has been interrupted;
     *          <code>false</code> otherwise.
     * @see #isInterrupted()
     * @revised 6.0
     */
    public static boolean interrupted() {
        return currentThread().isInterrupted(true);
    }

interrupt只是改变线程的中断状态，状态改变以后的具体逻辑还需要由代码来实现，另外的重要作用就是将等待中的线程解救出来，抛出InterruptedException，任何抛出InterruptedException异常的方法都可以使用interrupt()方法。

public class InterruptionInJava implements Runnable{
    private volatile static boolean on = false;
    public static void main(String[] args) throws InterruptedException {
        Thread testThread = new Thread(new InterruptionInJava(),"InterruptionInJava");
        //start thread
        testThread.start();
        Thread.sleep(1000);
        InterruptionInJava.on = true;
        testThread.interrupt();
 
        System.out.println("main end");
 
    }
 
    @Override
    public void run() {
        while(!on){
            try {
                Thread.sleep(10000000);
            } catch (InterruptedException e) {
                System.out.println("caught exception right now: "+e);
            }
        }
    }
}