Java Collections Java Java API
Class:
java.util.PriorityQueue
Method:
public E peek()
Retrieves,
but does not remove, the head of this queue, or returns
null
if this queue is empty.
Examples
 package com.logicbig.example.priorityqueue;
import java.util.PriorityQueue;
public class PeekExample {
//public E peek()
public static void main(String... args) {
PriorityQueue<String> pq = new PriorityQueue<>();
pq.offer("one");
pq.offer("two");
System.out.println(pq);
String element = pq.peek();
System.out.println(element);
element = pq.peek();
System.out.println(element);
}
}
Output[one, two]
one
one
|
|
