Java: Add all the elements of a priority queue to another priority queue

Last update on May 22 2025 13:14:13 (UTC/GMT +8 hours)

3. Add All Elements to Another PriorityQueue

Write a Java program to add all the elements of a priority queue to another priority queue.

Sample Solution:-

Java Code:

import java.util.PriorityQueue;
public class Exercise3 {
public static void main(String[] args) {
  PriorityQueue<String> queue1 = new PriorityQueue<String>();  
  queue1.add("Red");
  queue1.add("Green");
  queue1.add("Orange");
  System.out.println("Priority Queue1: "+queue1);
  PriorityQueue<String> queue2 = new PriorityQueue<String>();  
  queue2.add("Pink");
  queue2.add("White");
  queue2.add("Black");
  System.out.println("Priority Queue2: "+queue2);
    // adding queue2 to queue1
   queue1.addAll(queue2);
   System.out.println("New Priority Queue1: "+queue1);
 }
}

Sample Output:

Priority Queue1: [Green, Red, Orange]                                  
Priority Queue2: [Black, White, Pink]                                  
New Priority Queue1: [Black, Green, Orange, Red, White, Pink]

For more Practice: Solve these Related Problems:

Write a Java program to merge two PriorityQueues by using addAll() and then print the resulting queue in sorted order.
Write a Java program to combine two PriorityQueues of integers and then compute the sum of the merged queue's elements.
Write a Java program to join two PriorityQueues and then remove duplicates from the merged queue before printing.
Write a Java program to implement a method that takes two PriorityQueues, merges them, and returns a new PriorityQueue containing only common elements.

Go to:

PREV : Iterate PriorityQueue Elements.
NEXT : Insert Element into PriorityQueue.

Java Code Editor:

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