Java: Iterate through all elements in priority queue

Last update on March 12 2025 13:32:39 (UTC/GMT +8 hours)

Write a Java program to iterate through all elements in the 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

For more Practice: Solve these Related Problems:

• Write a Java program to iterate through a PriorityQueue using an Iterator and print each element with its natural ordering.
• Write a Java program to convert a PriorityQueue to a stream, filter elements that meet a condition, and print the filtered results.
• Write a Java program to iterate through a PriorityQueue using forEach() and a lambda expression, printing elements in uppercase.
• Write a Java program to traverse a PriorityQueue using a for-each loop and count the occurrences of a specific string.

Java Code Editor:

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