在Java中引发异常后重新启动同一线程

Question

我正在尝试在线程中执行一些代码。我扩展了Thread类，并在其中执行了一些代码。我也引发异常以终止当前线程并在catch块中重新启动它。这样做是在启动新线程时，然后显示异常结果。假设我的要求是打印1,2,3,4,5之类的计数器。第一次很好。但是，当我启动新实例时，结果是随机的，类似于1,1,1,1,1,1,12,4,6,1,1,1,1。有人可以帮我吗？这是我的代码如下：

    public class ThreadTest {
static Publish publish;
    public static void main(String[] args) {        
        publish =  new Publish();
        publish.start();
    }    

    static class Publish extends Thread {
    static int counter = 1;
      public void run(){
        while (true) {
            System.out.println("counter is: " + counter);
            counter++;
            try {
                Thread.sleep(2000);
                if (counter > 5) {
                    throw new InterruptedException("Exception thrown manually to restart thread");
                }
            } catch (Exception ex) {
                publish.interrupt();
                publish.getThreadGroup().interrupt();
                counter = 1;
                publish = new Publish();
                publish.start();
            }
        }

      }
  }

}

结果如下>>

    run:
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 2
counter is: 1
counter is: 3
counter is: 4
counter is: 1
counter is: 3
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 7
counter is: 8
counter is: 8
counter is: 9
counter is: 11
counter is: 12
counter is: 12
counter is: 14
counter is: 15
counter is: 15
counter is: 17
counter is: 18
counter is: 19
counter is: 20
counter is: 1
counter is: 20
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 20
counter is: 1
counter is: 1
counter is: 20
counter is: 20
counter is: 20
counter is: 20
counter is: 20
counter is: 2
counter is: 20
counter is: 20
counter is: 2
counter is: 20
counter is: 1
counter is: 1
counter is: 2
counter is: 2
counter is: 2
counter is: 2
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 4
counter is: 2
counter is: 4
counter is: 4
counter is: 2
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 2
counter is: 3
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 2
counter is: 2
counter is: 2
counter is: 3
counter is: 4
counter is: 6
counter is: 1
counter is: 1
counter is: 1
counter is: 3
counter is: 1
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 2
counter is: 5
counter is: 3
counter is: 4
counter is: 4
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 1
counter is: 6
counter is: 7
counter is: 7
counter is: 2
counter is: 1
counter is: 1
counter is: 3
counter is: 3
counter is: 4
counter is: 6
counter is: 7
counter is: 7
counter is: 6
counter is: 9
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 3
counter is: 1
counter is: 1
counter is: 3
counter is: 2
counter is: 3
counter is: 3
counter is: 4
counter is: 6
counter is: 2
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 1
counter is: 2
counter is: 4
counter is: 2
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 2
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 1
counter is: 2
counter is: 1
counter is: 4
counter is: 5
counter is: 5
counter is: 1
counter is: 2
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 3
counter is: 1
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 4
counter is: 6
counter is: 7
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 7
counter is: 8
counter is: 8
counter is: 1
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 2
counter is: 3
counter is: 4
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 5
counter is: 7
counter is: 7
counter is: 1
counter is: 1
counter is: 1
counter is: 4
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 7
counter is: 1
counter is: 3
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 2
counter is: 3
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 6
counter is: 8
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 5
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 3
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 5
counter is: 7
counter is: 8
counter is: 9
counter is: 10
counter is: 11
counter is: 12
counter is: 13
counter is: 1
counter is: 2
counter is: 3
counter is: 3
counter is: 5
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 2
counter is: 2
counter is: 4
counter is: 5
counter is: 6
counter is: 7
counter is: 8
counter is: 2
counter is: 2
counter is: 2
counter is: 5
counter is: 6
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 4
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 4
counter is: 5
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 6
counter is: 8
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 7
counter is: 8
counter is: 8
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 1
counter is: 3
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 1
counter is: 3
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 5
counter is: 6
counter is: 7
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 7
counter is: 8
counter is: 1
counter is: 2
counter is: 2
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 2
counter is: 3
counter is: 1
counter is: 2
counter is: 2
counter is: 4
counter is: 1
counter is: 1
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 7
counter is: 8
counter is: 9
counter is: 9
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 7
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 1
counter is: 1
counter is: 2
Exception in thread "Thread-260" java.lang.IllegalThreadStateException
    at java.lang.Thread.start(Thread.java:708)
counter is: 1
counter is: 2
    at threadtest.ThreadTest$Publish.run(ThreadTest.java:49)
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 2
counter is: 3
counter is: 5
counter is: 6
counter is: 7
counter is: 1
counter is: 1
counter is: 3
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 2
counter is: 3
counter is: 3
counter is: 3
counter is: 6
counter is: 7
counter is: 8
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 3
counter is: 6
counter is: 7
counter is: 8
counter is: 1
counter is: 3
Exception in thread "Thread-236" java.lang.IllegalThreadStateException
    at java.lang.Thread.start(Thread.java:708)
counter is: 1
    at threadtest.ThreadTest$Publish.run(ThreadTest.java:49)
counter is: 1
counter is: 2
counter is: 1
counter is: 4
counter is: 5
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 3
counter is: 1
counter is: 1
counter is: 1
Exception in thread "Thread-165" java.lang.IllegalThreadStateException
counter is: 3
    at java.lang.Thread.start(Thread.java:708)
    at threadtest.ThreadTest$Publish.run(ThreadTest.java:49)
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 2
counter is: 3
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 6
counter is: 8
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 5
counter is: 7
counter is: 8
counter is: 9
counter is: 10
counter is: 11
counter is: 12
counter is: 13
counter is: 14
counter is: 15
counter is: 16
counter is: 17
counter is: 18
counter is: 19
counter is: 20
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 4
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 1
Exception in thread "Thread-156" java.lang.IllegalThreadStateException
    at java.lang.Thread.start(Thread.java:708)
    at threadtest.ThreadTest$Publish.run(ThreadTest.java:49)
counter is: 1
counter is: 1
counter is: 1
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 7
counter is: 8
counter is: 9
counter is: 10
counter is: 11
counter is: 12
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 2
counter is: 2
counter is: 3
counter is: 6
counter is: 7
counter is: 8
counter is: 2
counter is: 3
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 7
counter is: 8
counter is: 1
counter is: 2
counter is: 2
counter is: 4
counter is: 5
counter is: 6
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 4
counter is: 6
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 3
counter is: 5
counter is: 5
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 7
counter is: 8
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 1
counter is: 5
counter is: 6
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 7
counter is: 8
counter is: 8
counter is: 10
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 4
counter is: 6
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 4
counter is: 6
counter is: 7
counter is: 8
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 7
counter is: 8
counter is: 9
counter is: 10
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 7
counter is: 7
counter is: 9
counter is: 9
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 7
counter is: 8
counter is: 1
counter is: 2
counter is: 2
counter is: 4
counter is: 5
counter is: 5
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 3
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
counter is: 6
counter is: 7
counter is: 8
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 1
counter is: 2
counter is: 1
counter is: 2
counter is: 6

Answer 1

此程序的问题在于，线程只是被创建而从未被破坏，因为您自己中断了正在运行的线程，这就是它被弄乱的地方。线程并没有停止，而是继续在循环内执行。我不会评论这是否是正确的方法。但我建议寻找其他替代方法。我在您的程序中做了如下修改：

public class ThreadTest {
    static Publish publish;

    public static void main(String[] args) {
        System.out.println("Initial active threads : " + Thread.activeCount());
        publish = new Publish();
        publish.start();
    }

    static class Publish extends Thread {
        static int counter = 1;

        public void run() {
            while (true) {
                System.out.println("counter is: " + counter);
                counter++;
                try {
                    Thread.sleep(2000);
                    if (counter > 5) {
                        throw new InterruptedException("Exception thrown manually to restart thread");
                    }
                } catch (Exception ex) {
                    counter = 1;
                    publish = new Publish();
                    publish.start();
                    System.out.println("active threads : " + Thread.activeCount());
                    return;
                }
            }

        }
    }
}

这是程序的输出：

Initial active threads : 2
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
active threads : 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
active threads : 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
active threads : 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
active threads : 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
active threads : 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
active threads : 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
active threads : 4
counter is: 1
counter is: 2
counter is: 3
counter is: 4
counter is: 5
active threads : 4
counter is: 1
counter is: 2
counter is: 3

如果要查看正在创建的线程总数，而又不想在程序中完全停止，请尝试为当前活动线程放置打印语句。

我希望它会有所帮助。干杯！