Interrupt笔记

public static void main(String[] args) {
Thread t=new Thread(new Runnable() {
@Override
public void run() {
try {
System.out.println("begin sleep");
//Thread.interrupted()会清除中断标识为false,System.out.println(Thread.interrupted());
//如果在还未阻塞的线程上调用interrupt()会给该线程的中断标识设为true,之后在调用抛出InterruptedException的阻塞方法时会立即抛出该异常。
                    Thread.sleep(2000);
System.out.println("after throwing...");
} catch (InterruptedException e) {
System.out.println("after catching...");
}
System.out.println("exit run()...");
}
});
t.start();
try {
TimeUnit.MILLISECONDS.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("t.interrupt() go");
t.interrupt();
System.out.println("t.interrupt() end");
}

结果:

1:begin sleep
2:t.interrupt() go
3:t.interrupt() end
4:after catching...
5:exit run()...

由于是两个线程,3、4、5顺序随机

  上面是中断sleep,接下来中断wait

  

  

public static void main(String[] args) {
Thread t=new Thread(new Runnable() {
@Override
public void run() {
try {
System.out.println("begin sleep");
            //wait()方法必须在同步块或同步方法中进行,并且锁的对象和调用对象需一致,否则会抛出java.lang.IllegalMonitorStateException的运行时异常
                    synchronized (Thread.currentThread()){
Thread.currentThread().wait();
}
System.out.println("after throwing...");
} catch (InterruptedException e) {
System.out.println("after catching...");
}
System.out.println("exit run()...");
}
});
t.start();
try {
TimeUnit.MILLISECONDS.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("t.interrupt() go");
t.interrupt();
System.out.println("t.interrupt() end");
}

  结果:

1:begin wait
2:t.interrupt() go
3:t.interrupt() end
4:after catching...
5:exit run()...

  由于是两个线程,3、4、5顺序随机

  另外interrup()方法无法中断IO阻塞和锁互斥阻塞,此时有两种解决方案

  1:关闭竞争的资源,比如:IO阻塞时,关闭阻塞的流,或者使用nio,nio提供了更人性化的中断响应,被阻塞的通道会自动响应中断。

  2:使用ReentrantLock的lockInterruptibly()方法来获取锁,此时锁互斥可以相应interrup()方法。

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转载自www.cnblogs.com/zou-rong/p/12544730.html