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Simple Example of PriorityQueue in Java .

import java.util.*;

class Test5{

public static void main(String args[]){

PriorityQueue pq=new PriorityQueue();

pq.add("Amit");

pq.add("Hello");

pq.add("My");

pq.add("Java");

System.out.println("show:"+pq.element());

System.out.println("show:"+pq.peek());

System.out.println("iterating the queue elements:");

Iterator itr=pq.iterator();

while(itr.hasNext()){

System.out.println(itr.next());

System.out.println("after removing two elements:");

Iterator itr2=pq.iterator();

while(itr2.hasNext()){

System.out.println(itr2.next());

}}}

Output: show:Amit
              show:Amit
iterating the queue elements:
Amit
Hello
My
Java
after removing two elements:
Java
My