동기화 - 자바

java.util.Queue<>

.offer()

.remove()

java.util.concurrent.BlockingQueue<> -> extends Queue<>

synchronized queue

.put()

.take()

java.util.concurrent.LinkedBlockingQueue<> implements BlockingQueue<> // Unlimited size

java.util.concurrent.ArrayBlockingQueue<> implements BlockingQueue<> // Fixed size

java.util.concurrent.SynchronousQueue<> implements BlockingQueue<> // Size of 1