Output of the code and how its work?

Question

import java.util.*;  
class TestCollection12{  
public static void main(String args[]){  
PriorityQueue<String> queue=new PriorityQueue<String>();  
queue.add("Amit");  
queue.add("Vijay");  
queue.add("Karan");  
queue.add("Jai");  
queue.add("Rahul");  
System.out.println("head:"+queue.element());  
System.out.println("head:"+queue.peek());  
System.out.println("iterating the queue elements:");  
Iterator itr=queue.iterator();  
while(itr.hasNext()){  
System.out.println(itr.next());  
}  
queue.remove(); 
 queue.poll();  
System.out.println("after removing two elements:"); 
 Iterator<String> itr2=queue.iterator();
  while(itr2.hasNext()){  System.out.println(itr2.next()); 
 }  
}  

Answer 1

https://www.sololearn.com/learn/643/?ref=app

Answer 2

well for the output, just run it 😅
on how it works:
do you know what a queue is?
what are your guesses on how it works/parts of it work? 😁