Previously we checked on ReentRantLock and its fairness. One of the things we can stumble upon is the creation of a Condition. By using Condition, we can create mechanisms that allow threads to wait for specific conditions to be met before proceeding with their execution.
Java
public interface Condition {
void await() throws InterruptedException;
void awaitUninterruptibly();
long awaitNanos(long nanosTimeout) throws InterruptedException;
boolean await(long time, TimeUnit unit) throws InterruptedException;
boolean awaitUntil(Date deadline) throws InterruptedException;
void signal();
void signalAll();
}