interrupt,interrupted,isInterrupted三者区别【附例子】

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{

	@Override
	public 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{

	@Override
	public 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{

	@Override
	public void run() {
           for(int i=0;i<1000;i++){
        	   System.out.println(i);
        	   System.out.println(Thread.currentThread().isInterrupted());
           }
		  }
	
}



你可能感兴趣的:(java)