w3resource

Java Collection, PriorityQueue Exercises: Iterate through all elements in priority queue

Java Collection, PriorityQueue Exercises: Exercise-2 with Solution

Write a Java program to iterate through all elements in priority queue.

Sample Solution:-

Java Code:

import java.util.PriorityQueue;
public class Exercise2 {
  public static void main(String[] args) {
    PriorityQueue<String> pq = new PriorityQueue<String>();  
  pq.add("Red");
  pq.add("Green");
  pq.add("Orange");
  pq.add("White");
  pq.add("Black");
  System.out.println("Elements of the Priority Queue: ");
  // iterate the Priority Queue
  for (String element : pq) {
    System.out.println(element);
    }
 }
}

Sample Output:

Elements of the Priority Queue:                                        
Black                                                                  
Green                                                                  
Orange                                                                 
White                                                                  
Red

Java Code Editor:

Contribute your code and comments through Disqus.

Previous: Create a new priority queue, add some colors (string) and print out the elements of the priority queue.
Next: Add all the elements of a priority queue to another 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