如何中断一个正在运行的线程？

解决方法

下面的示例演示如何中断一个正在运行的线程，使用interrupt() 方法，并检查如果一个线程是否中断使用isInterrupted()方法。

public class GeneralInterrupt extends Object 
implements Runnable {
   public void run() {
      try {
         System.out.println("in run() - 
         about to work2()");
         work2();
         System.out.println("in run() -
         back from  work2()");
      }
      catch (InterruptedException x) {
         System.out.println("in run() -
         interrupted in work2()");
         return;
      }
      System.out.println("in run() - 
      doing stuff after nap");
      System.out.println("in run() - 
      leaving normally");
   }
   public void work2() throws InterruptedException {
      while (true) {
         if (Thread.currentThread().isInterrupted()) {
            System.out.println("C isInterrupted()="
            + Thread.currentThread().isInterrupted());
            Thread.sleep(2000);
            System.out.println("D isInterrupted()="
            + Thread.currentThread().isInterrupted());
         }
      }
   }
   public void work() throws InterruptedException {
      while (true) {
         for (int i = 0; i < 100000; i++) {
            int j = i * 2;
         }
         System.out.println("A isInterrupted()="
         + Thread.currentThread().isInterrupted());
         if (Thread.interrupted()) {
            System.out.println("B isInterrupted()="
            + Thread.currentThread().isInterrupted());
            throw new InterruptedException();
         }
      }
   }
   public static void main(String[] args) {
      GeneralInterrupt si = new GeneralInterrupt();
      Thread t = new Thread(si);
      t.start();
      try {
         Thread.sleep(2000);
      }
      catch (InterruptedException x) {
      }
      System.out.println("in main() - 
      interrupting other thread");
      t.interrupt();
      System.out.println("in main() - leaving");
   }
}

结果

上面的代码示例将产生以下结果。

in run() - about to work2()
in main() - interrupting other thread
in main() - leaving
C isInterrupted()=true
in run() - interrupted in work2()