Best way for a thread to wait without busy-waiting

Question

Hi!
I have a thread that has nothing to do but to monitor the status of a variable
public static boolean askToClose. This variable is set by other
threads to indicate that this thread should stop now. But I don't want the thread
to busy-wait like in this piece of code :
public void run() {
     while (!askToClose) {
          Thread.sleep(1000);
     cleanAndStop();     
}I'm new to Thread programming in Java so I'm not sure what's the best way to wait
for an event without busy-waiting. I've tried using interruption instead of
monitoring for the boolean variable :
public void run() {
     try {
          synchronized (this) {
               System.out.println("WAITING");
               wait(0);
     catch (InterruptedException e) {
          System.out.println("INTERRUPTED !");
     cleanAndStop();     
}and the other threads would simply call myThread.interrupt() instead of setting
askToClose = true;And I've also used a LinkedBlockingQueue :
public static LinkedBlockingQueue q = new LinkedBlockingQueue();
public void run() {
     try {
          q.take();//Waiting
     catch (InterruptedException e) {}
     cleanAndStop();     
}and on the other threads :
MyThread.q.add(new Object());Which one is the best solution ? Do I really avoid busy waiting with this code? Is
there a better way of doing this?
Thx for your help !

Answer 1

Your wait() based solution is OK, except that the other thread should
use
synchronized()
  notify();
}