一个例子说明Thread interrupt() interrupted() isInterrupted()三个方法关系和区别
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2022-07-12 18:37:07
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直接贴上例子
public class InteruptTest extends Thread { static int i = 0; @Override public void run() { while (!Thread.currentThread().isInterrupted()) { // i happy run , please break me System.out.println("I'm runing " + i++); try { Thread.sleep(5000); } catch (InterruptedException e) { Thread.currentThread().interrupt();//①:发出中断请求,设置中断状态 System.out.println(Thread.currentThread().isInterrupted());//②:判断中断状态(不清除中断状态) System.out.println(Thread.interrupted());//③:判断中断状态(清除中断状态) } System.out.println("current thread haven't been broken"); } } public static void main(String[] args) throws InterruptedException { Thread t1 = new InteruptTest(); t1.start(); Thread.sleep(1000); t1.interrupt(); } }
这里有几个关键点是:
①:调用Thread.currentThread().interrupt()方法并不会立刻中断当前线程,只有等当前线程阻塞在类似sleep和wait等操作上才会执行
②:interrupt()会发出中断命令,而isInterrupted()和interrupted()并不会发出中断线程的命令;
isInterrupted()和interrupted()的区别在于 interrupted会清除中断的状态,所以上面实例程序 会一直运行。如果注释掉第三点(catch代码库第三条),则程序会在下一次到达sleep的时候终止
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