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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 statement

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.

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.

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