interrupt,interrupted,isInterrupted三者区别【附例子】
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学了线程这么久, 一直没搞清楚这三者的区别,就在这里区别一下
1. interrupt
interrupt只是设置中断状态,并不会使程序暂停,会继续执行,如果需要显示地暂停程序,必须catch这个InterruptedException,那么捕捉到中断就不会继续程序了;
可以对指定线程调用.interrupt()方法;
以下测试代码说明catch后暂停程序
public class interruptThread {int count=1;public static void main(String[] args) throws Exception{// TODO Auto-generated method stub Thread t=new Thread(new t1(),"a"); t.start(); t.interrupt();}}class t1 implements Runnable{@Overridepublic void run() { try{Thread.sleep(100); System.out.println("这里不被执行"); }catch(InterruptedException e){ System.out.println(Thread.currentThread().isInterrupted()); } }}
2. interrupted
只能对当前线程调用,调用方法Thread.interrupted;
会清空原有的interrupt状态,例如在上段代码输出结果是false,因为interruptedException捕捉到后,将中断状态恢复了,这点区别于isInterrupted()
例子如下
public class interruptThread {int count=1;public static void main(String[] args) throws Exception{// TODO Auto-generated method stub Thread t=new Thread(new t1(),"a"); t.start(); t.interrupt();}}class t1 implements Runnable{@Overridepublic void run() { for(int i=0;i<1000;i++){ System.out.println(i); System.out.println(Thread.currentThread().interrupted()); } }}
3. isInterrupted
可以对指定线程调用;
不改变中断状态,和interrupted区别开来;
public class interruptThread {int count=1;public static void main(String[] args) throws Exception{// TODO Auto-generated method stub Thread t=new Thread(new t1(),"a"); t.start(); t.interrupt();}}class t1 implements Runnable{@Overridepublic void run() { for(int i=0;i<1000;i++){ System.out.println(i); System.out.println(Thread.currentThread().isInterrupted()); } }}
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