java中线程在运行过程中可以通过interrupt方法进行中断，这里需要提到几个的注意点：

1、中断状态是可以被清除或者说恢复的 2、中断请求不是一定会被响应(如io包中的一些操作，只会标记中断状态，而对线程并没有实际影响) 3、调用interrupt并不是立即中断线程执行，而是传递了中断请求

下面看demo

public class MyInterrupt implements Runnable{       PRivate volatile int i = 0;     @override     public void run() {         while (!Thread.currentThread().isInterrupted()) {              System.out.println(i++ + String.valueOf(Thread.currentThread().isInterrupted()));                          //Point1：如果在这里调用中断请求，程序会在i=20时抛出异常，但不会中断，线程继续执行下去             //if (i == 20) {             //    cancel();             //}             try {                 Thread.sleep(100);                 //this.wait();             } catch (InterruptedException e) {                 e.printStackTrace();              }             //Point2：在此处调用中断请求，最后打印 19：false  isInterrupted()返回true所以不在进入循环体             if (i == 20) {                 cancel();             }          }     }      public void cancel(){         Thread.currentThread().interrupt();     }      public static void main(String[] args) {         new Thread(new MyInterrupt()).start();     } } 

在Point1处去中断时候为什么程序会继续执行，这里我们看下sleep方法以及waIT方法的doc

 /**      * Causes the currently executing thread to sleep (temporarily cease      * execution) for the specified number of milliseconds, subject to      * the precision and accuracy of system timers and schedulers. The thread      * does not lose ownership of any monitors.      *      * @param  millis      *         the length of time to sleep in milliseconds      *      * @throws  IllegalArgumentException      *          if the value of {@code millis} is negative      *      * @throws  InterruptedException      *          if any thread has interrupted the current thread. The      *          <i>interrupted status</i> of the current thread is      *          cleared when this exception is thrown.      */     public static native void sleep(long millis) throws InterruptedException;