Java Thread interrupt

public class DemoTest() {
    public static void main(String[] args) {
        new DemoTest();
    }

    public DemoTest() {
        ThreadTest threadTest = new ThreadTest();
        threadTest.start();
        Thread.sleep(1000);
        threadTest.interrupt();//此处想中断线程，如果在中断的时刻，刚好该线程处于sleep状态，则会被该线程的sleep方法的异常捕获
    }

    class ThreadTest extends Thread {
        public void run() {
            while(!isInterrupted()) {
            
                 /**
                  * your business code
                  * blah.blah......
                  */
                try {
                    Thread.sleep(1000);//you may need take a break
                } catch(InterruptedException e) {
                    Thread.currentThread.interrupt();//此处关键，调用当前线程interrupt()方法，可能会导致想中断的线程无法中断，需再次调用当前线程的interrupt()方法
                }      
            }  
        }    
    }

}