PriorityQueue methods in java What can be Yasser Ibrahim @Jobilize

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Question 208 / 297: What can be inserted, independently, at line // insert code here to cause the program to print out : [3, 4, 7, 0]
Choose 3

import java.util.*;


public class Test {

	public static void main(String[] args) {
		Queue<Integer> queue  = new LinkedList<Integer>();
		queue.add(1);
		queue.add(3);
		queue.add(4);
		queue.add(7);
		
		// insert code here
		
		System.out.println(queue);
	}
}

queue.poll();queue.offer(0);queue.peek();

queue.peek();queue.add(0);queue.peek();queue.poll();

queue.add(0);queue.remove();queue.peek();

queue.add(0);queue.poll();queue.remove();

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Explanation:

poll(): retrieves and removes the head of this queue, or null if this queue is empty.

peek(): retrieves, but does not remove, the head of this queue, returning null if this queue is empty.

offer(): inserts the specified element into this priority queue.

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