How to make another thread sleep in Java

Question

I have a class that extends Thread. This thread when running spends most of it\'s time sleeping, it will perform a check, if true perform a simple action, then sleep for 1/2

Answer 1

Add this to your thread:

public AtomicBoolean waitLonger = new AtomicBoolean  ();
public Object lock = new Object ();

In run():

synchronized (lock) {
    if (waitLonger.get ()) {
        lock.wait ();
    }
}

In the other thread:

synchronized (lock) {
try {
    sleeper.waitLonger.set(true);
    ...
    lock.notify();
    sleeper.waitLonger.set(false);
}

This way, you can make the sleeper wait until the other work has completed.