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

Java AbstractQueue.peekFirst() is a method in the Java AbstractQueue class that retrieves, but does not remove, the first element in the queue. It returns null if the queue is empty. Introduced in Java 2004 with Java 5, peekFirst() is commonly used for checking the first element in a queue without modifying it, useful in queue management systems where you need to inspect but not alter the head of the queue.

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