java 6线程中断

Question

我有这段代码:

public class ThreadInteraction {
       public static void main(String[] argv) {
        System.out.println("Create and start a thread t1, then going to sleep...");
        Thread1 t1 = new Thread1();
        t1.start();


        try{
            Thread.sleep(1000);
        }
        catch(InterruptedException e) {
            System.out.println(e.toString());
        }

            //let's interrupt t1
            System.out.println("----------- Interrupt t1");
        t1.interrupt();

        for(int i =0; i<100; i++)
            System.out.println("Main is back");
     }
}

class Thread1 extends Thread {
      public void run() {
         for(int i =0; i<10000; i++)
              System.out.println(i + "thread1");
      }
 }

它似乎t1.interrupt()不起作用,因为在我的输出中出现所有10000 t1打印.难道我做错了什么？

Answer 1

Thread.interrupt()实际上不会阻止任何事情.此方法仅用于设置线程的中断状态,但您必须检查它.这是您应该如何组织代码以使其工作:

public void run() {
    for (int i = 0; i < 10000; i++) {
        if (interrupted()) break;
        System.out.println(i + "thread1");
    }
}

Thread.interrupted()这里清除中断状态,这是好的,因为我们直接控制线程.如果您尝试检测中断,例如,在java.util.concurrent. Callable线程池的某个线程上运行中断,那么最好使用,Thread.currentThread().isInterrupted();因为您不知道线程中断策略.