Java Collection, PriorityQueue Exercises: Convert a priority queue to an array containing all of the elements of the queue
Java Collection, PriorityQueue Exercises: Exercise-10 with Solution
Write a Java program to convert a priority queue to an array containing all of the elements of the queue.
Sample Solution:-
Java Code:
import java.util.*;
public class Example10 {
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);
//Convert a linked list to array list
List<String> array_list = new ArrayList<String>(pq1);
System.out.println("Array containing all of the elements in the queue: "+array_list);
}
}
Sample Output:
Original Priority Queue: [Black, Red, Green, White] Array containing all of the elements in the queue: [Black, Red, Green, White]
Java Code Editor:
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Java: Tips of the Day
How to sort an ArrayList?
Collections.sort(testList); Collections.reverse(testList);
That will do what you want. Remember to import Collections though!
Ref: https://bit.ly/32urdSe
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