A priority queue in Java is a special type of queue wherein all the elements are ordered as per their natural ordering or based on a custom Comparator supplied at the time of creation. … The Priority Queue class is part of Java’s collections framework and implements the Queue interface.

What is priority queue with example?

The priority queue supports only comparable elements, which means that the elements are either arranged in an ascending or descending order. For example, suppose we have some values like 1, 3, 4, 8, 14, 22 inserted in a priority queue with an ordering imposed on the values is from least to the greatest.

How priority queue is implemented in Java?

The PriorityQueue is based on the priority heap. The elements of the priority queue are ordered according to the natural ordering, or by a Comparator provided at queue construction time, depending on which constructor is used.