w3resource

Java Collection, PriorityQueue Exercises: Insert a given element into a priority queue

Java Collection, PriorityQueue Exercises: Exercise-4 with Solution

Write a Java program to insert a given element into a priority queue.

Sample Solution:-

Java Code:

import java.util.PriorityQueue;

  public class Example4 {
  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);
   
   // Inserts the specified element into this priority queue.
    pq1.offer("Blue");
 
    System.out.println("The New Priority Queue: " + pq1);
  } 
}

Sample Output:

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

Java Code Editor:

Contribute your code and comments through Disqus.

Previous: Add all the elements of a priority queue to another priority queue.
Next:Remove all the elements from a priority queue.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Share this Tutorial / Exercise on : Facebook and Twitter

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