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  • Java 学习笔记之 线程interrupted方法

    线程interrupted方法:

    interrupted()是Thread类的方法,用来测试当前线程是否已经中断。

    public class InterruptThread extends Thread{
        @Override
        public void run() {
            for (int i = 0; i< 5000000; i++){
                System.out.println("i=" + (i + 1));
            }
        }
    }
    
    public class ThreadRunMain {
        public static void main(String[] args) {
            testInterruptThread();
        }
    
        public static void testInterruptThread(){
            try {
                InterruptThread it = new InterruptThread();
                it.start();
                Thread.sleep(1000);
                it.interrupt();
                System.out.println("First call: " + Thread.interrupted());
                System.out.println("Second call: " + Thread.interrupted());
            } catch (InterruptedException e) {
                System.out.println("Main catch");
                e.printStackTrace();
            }
            System.out.println("end!");
        }
    }

    运行结果:

    从控制台打印的结果来看,返回的结果是false,因为当前线程是main,被中断的却是InterruptThread,所以main线程不受影响。 

    再看一个例子:

    public class ThreadRunMain {
        public static void main(String[] args) {
            testMainInterruptThread();
        }
    
        public static void testMainInterruptThread(){
            Thread.currentThread().interrupt();
            System.out.println("First call: " + Thread.interrupted());
            System.out.println("Second call: " + Thread.interrupted());
            System.out.println("end!");
        }
    }

    运行结果:

    同样是调用Thread.interrupted(), 但是为什么第一次结果是true,第二次确是false呢?

    因为interrupted()方法具有清除状态功能,所以第二次调用interrupted()返回的值是false。

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  • 原文地址:https://www.cnblogs.com/AK47Sonic/p/7668045.html
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