﻿ Java: Add elements of a priority queue to another queue

# 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);
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:

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.

﻿

## Java: Tips of the Day

getEnumMap

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