Java LinkedList addLast() Method

The LinkedList.addLast() method in Java is used to add an element at the end of a LinkedList. This guide will cover the method’s usage, explain how it works, and provide examples to demonstrate its functionality.

Table of Contents

1. Introduction
2. addLast Method Syntax
3. Examples
   • Adding an Element at the End
   • Handling Null Values
4. Conclusion

Introduction

The LinkedList.addLast() method is a member of the LinkedList class in Java. It allows you to add an element at the end of the LinkedList, making it the last element in the list. This method is particularly useful for implementing queue-like structures or appending elements in a specific order.

addLast Method Syntax

The syntax for the addLast method is as follows:

public void addLast(E e)

• e: The element to be added to the end of the LinkedList.

Examples

Adding an Element at the End

The addLast method can be used to add an element at the end of a LinkedList.

Example

import java.util.LinkedList;

public class AddLastExample {
    public static void main(String[] args) {
        // Creating a LinkedList of Strings
        LinkedList<String> list = new LinkedList<>();

        // Adding elements to the LinkedList
        list.add("Apple");
        list.add("Banana");

        // Adding an element at the end of the LinkedList
        list.addLast("Orange");

        // Printing the LinkedList
        System.out.println("LinkedList: " + list);
    }
}

Output:

LinkedList: [Apple, Banana, Orange]

Handling Null Values

The addLast method can handle null values. Adding a null value to a LinkedList will include null as the last element in the list.

Example

import java.util.LinkedList;

public class AddLastExample {
    public static void main(String[] args) {
        // Creating a LinkedList of Strings
        LinkedList<String> list = new LinkedList<>();

        // Adding elements to the LinkedList
        list.add("Apple");
        list.add("Banana");

        // Adding a null element at the end of the LinkedList
        list.addLast(null);

        // Printing the LinkedList
        System.out.println("LinkedList: " + list);
    }
}

Output:

LinkedList: [Apple, Banana, null]

Conclusion

The LinkedList.addLast() method in Java is a simple and effective way to add elements to the end of a LinkedList. By understanding how to use this method, you can efficiently manage collections of objects in your Java applications. Whether you are adding elements to implement queue-like behavior or handling potential null values, the addLast method provides a flexible solution for these tasks.