Java program to add elements to Queue using add() and offer() methods

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mahmoud2506

2022-05-07

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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. Here, we will use add() and offer() methods to insert elements into the queue.

Program/Source Code:

The source code to add elements to Queue using add() and offer() methods is given below. The given program is compiled and executed successfully.

// Java program to add elements to Queue using 
// add() and offer() methods

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);

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

    queue.offer(30);
    queue.offer(40);
    queue.offer(50);

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

Output:

Queue elements: 
10 20 
Updated Queue: 
10 20 30 40 50

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. Then we used to add(), offer() methods to insert items into the queue and printed the queue.

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Java program to add elements to Queue using add() and offer() methods

Java program to add elements to Queue using add() and offer() methods

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