如何中断线程
目前使用的方法
调用interrupt(), 通知线程应该中断了
1) 如果线程处于被阻塞状态，那么线程将立即退出被阻塞状态，并抛出一个InterruptException异常
2) 如果线程处于正常状态，那么会将该线程的中断标志置为true。 被设置中断标志的线程将继续运行，不受影响
如下面的代码
public class InterruptDemo {
public static void main(String[] args) throws InterruptedException{
Runnable interruptTask = new Runnable() {
int i = 0;
@Override
public void run() {
try {
while (!Thread.currentThread().isInterrupted()) {
Thread.sleep(100);
i++;
System.out.println(Thread.currentThread().getName() + " (" + Thread.currentThread().getState() + " ) loop " + i);
}
} catch (InterruptedException e) {
System.out.println(Thread.currentThread().getName() + " (" + Thread.currentThread().getState() + " ) catch InterruptedException");
//e.printStackTrace();
}
}
};
Thread t1 = new Thread(interruptTask, "t1");
System.out.println(t1.getName() + " (" + t1.getState() + " ) is new" );
t1.start();
System.out.println(t1.getName() + " (" + t1.getState() + " ) is started ");
Thread.sleep(300);
t1.interrupt();
System.out.println(t1.getName() + " (" + t1.getState() + " ) is interrupted ");
Thread.sleep(300);
System.out.println(t1.getName() + " (" + t1.getState() + " ) is interrupted now");
}
}
打印结果如下：
t1 (NEW ) is new t1 (RUNNABLE ) is started t1 (RUNNABLE ) loop 1 t1 (RUNNABLE ) loop 2 t1 (RUNNABLE ) loop 3 t1 (RUNNABLE ) is interrupted t1 (TERMINATED ) is interrupted now
当调用interrupt的时候，线程正在执行sleep（ Thread.sleep(100);），抛出异常。