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Java program to remove all elements of queue

Java example to remove all elements of queue.
Submitted by Nidhi, on April 27, 2022

Problem Solution:

In this program, we will create a queue using the Queue interface with the help of Linked List collection and store elements in a FIFO (First In First Out) manner. Then we will remove all elements from the queue using the clear() method.

Program/Source Code:

The source code to remove all elements of the queue is given below. The given program is compiled and executed successfully.

// Java program to remove all elements of queue

import java.util.LinkedList;
import java.util.Queue;

public class Main {
  public static void main(String[] args) {
    Queue < Integer > queue = new LinkedList < > ();

    queue.add(10);
    queue.add(20);
    queue.add(30);
    queue.add(40);
    queue.add(50);

    System.out.println("Queue elements: ");
    for (int item: queue) {
      System.out.print(item + " ");
    }

    queue.clear();

    System.out.println("\nQueue elements: ");
    for (int item: queue) {
      System.out.print(item + " ");
    }
  }
}

Output:

Queue elements: 
10 20 30 40 50 
Queue elements:

Explanation:

In the above program, we imported the "java.util.LinkedList" and "java.util.Queue" packages to use the Queue Interface and LinkedList collection respectively. Here, we created a class Main. The Main class contains a main() method. The main() method is the entry point for the program.

In the main() method, we created a queue using the LinkedList collection and added items to it. Then we removed elements from the queue using the clear() method.

Java Queue Interface Programs »

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