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Thread中interrupted()方法和isInterrupted()方法区别

 2 years ago
source link: https://yang295513.github.io/2020/04/12/Thread%E4%B8%ADinterrupted-%E6%96%B9%E6%B3%95%E5%92%8CisInterrupted-%E6%96%B9%E6%B3%95%E5%8C%BA%E5%88%AB/
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源代码对比

    public boolean isInterrupted() {
        return isInterrupted(false);
    }
    public static boolean interrupted() {
        return currentThread().isInterrupted(true);
    }

  • isInterrupted是非静态的

  • interrupted是静态的，而且本质上是调用了当前线程中的isInterrupted 方法，不过传入了一个参数true

当我们调用线程停止方法interrupt()方法停止当前线程的时候他并没有停止，而是在做了一个标记，也就说这个标记说明当前线程已经停止了，但是实际上线程还没有停止。

interrupted()是静态方法：内部实现是调用的当前线程的isInterrupted()，并且会重置当前线程的中断状态

isInterrupted()是实例方法，是调用该方法的对象所表示的那个线程的isInterrupted()，不会重置当前线程的中断状态

public class Thread03 {
    public static void main(String[] args) throws InterruptedException {
        Thread.sleep(200);
        Thread.currentThread().interrupt();//更改了中断为为true
        System.out.println(Thread.currentThread().isInterrupted());//直接返回true
        System.out.println(Thread.currentThread().isInterrupted());//直接返回true
        System.out.println(Thread.interrupted());//更改标志位状态为false,但是返回true
        System.out.println(Thread.interrupted());//返回false
        System.out.println(Thread.currentThread().isInterrupted());//直接返回true
    }
}
  • isInterrupted不会更改中断标志位
  • interrupted如果发现标志位和实际状态不一致就会更改其状态，并且返回原有状态
  • interrupted返回的是当前执行该方法的状态，isInterrupted返回的是该线程的状态。

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