Java Collection, PriorityQueue Exercises: Add all the elements of a priority queue to another priority queue

Java Collection, PriorityQueue Exercises: Exercise-3 with Solution

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>();  
  System.out.println("Priority Queue1: "+queue1);
  PriorityQueue<String> queue2 = new PriorityQueue<String>();  
  System.out.println("Priority Queue2: "+queue2);
    // adding queue2 to queue1
   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]

Java Code Editor:

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Java: Tips of the Day


Converts to enum to Map where key is the name and value is Enum itself.

public static <E extends Enum<E>> Map<String, E> getEnumMap(final Class<E> enumClass) {
    return Arrays.stream(enumClass.getEnumConstants())
            .collect(Collectors.toMap(Enum::name, Function.identity()));

Ref: https://bit.ly/3xXcFZt