How to interrupt thread
Current methods used
Call interrupt (), notify the thread should be interrupted
1) If the thread is blocked state, the thread will exit the blocked state immediately, and throw an anomaly InterruptException
2) If a thread is in a normal state, then the thread will interrupt flag is set to true. Interrupt flag is set thread will continue to run unaffected
The following code
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");
}
}
Print results are as follows:
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
When calling interrupt, the thread is executing SLEEP ( Thread.sleep(100);), an exception is thrown.