https://DevOpsCloud.io -- Cloud Monk Losang Jinpa, Ph.D., MCSE/MCT, GitOps DevOps Engineer

Java ConcurrentLinkedDeque.pollFirst() is a method in the Java ConcurrentLinkedDeque class that retrieves and removes the first element of the deque, or returns null if the deque is empty. It is non-blocking and thread-safe, designed for concurrent environments. Introduced in Java 2004 with Java 5, pollFirst() is used in applications requiring safe, non-blocking access to the front of a deque in multi-threaded systems.

https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentLinkedDeque.html