Java 示例 - 中断线程

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  问题描述

  如何中断正在运行的线程？
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  解决方案

  下面的例子演示了如何中断正在运行的线程 interrupt() 方法并使用 isInterrupted() 方法检查线程是否被中断。

  
  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");
     }
  }
  

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  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()
  

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