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Java Collection, PriorityQueue Exercises: Remove all the elements from a priority queue

Java Collection, PriorityQueue Exercises: Exercise-5 with Solution

Write a Java program to remove all the elements from a priority queue.

Sample Solution:-

Java Code:

import java.util.*;
  public class Example5 {
  public static void main(String[] args) {
   // Create Priority Queue
           PriorityQueue<String> pq1 = new PriorityQueue<String>();  
   // use add() method to add values in the Priority Queue
          pq1.add("Red");
          pq1.add("Green");
          pq1.add("Black");
          pq1.add("White");
    System.out.println("Original Priority Queue: "+pq1);
   
   // Removing all the elements from the Priority Queue
    pq1.clear();
 
    System.out.println("The New Priority Queue: " + pq1);
  } 
}

Sample Output:

Original Priority Queue: [Black, Red, Green, White]                    
The New Priority Queue: []

Java Code Editor:

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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