Java PriorityQueue peek() Method

Last Updated : 17 Mar 2025

The peek() method of PriorityQueue class retrieves the head of this queue but doesn't remove it. The method returns null if this queue is empty.

Syntax

Parameter

NA

Return Value

The peek() method returns this queue's head, and if this queue is empty, returns null.

Example 1

Output:

Head of queue is: 25
Queue after using peek() method : 
25
65
56
98

Example 2

Output:

Head of queue is: null

Example 3

Output:

The winner of Lottery Prize is Sham with lottery number 123456