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Java LinkedList addFirst() method with Example

Java LinkedList addFirst() method: Here, we are going to learn about the addFirst() method of LinkedList class with its syntax and example.
Submitted by Preeti Jain, on June 11, 2019

LinkedList addFirst() method

• This method is available in package java.util.LinkedList.
• This method is used to insert an object at the initial or beginning stage of the linked list.

Syntax:

    void addFirst(Object o){
    }

Parameter(s):

We can pass only one object as a parameter in the method and that object will add at the beginning of the linked list.

Return value:

The return type of this method is void that means this method returns nothing.

Java program to demonstrate example of LinkedList addFirst() method

import java.util.LinkedList;

public class LinkList {
    public static void main(String[] args) {
        LinkedList list = new LinkedList();
        // use add() method to add elements in the list 
        list.add(10);
        list.add(20);
        list.add(30);
        list.add(40);
        list.add(50);

        //  Current list Output
        System.out.println("The Current list is:" + list);

        // Add new elements at the beginning 
        list.addFirst(5);
        list.addFirst(3);

        //  New list Output 
        System.out.println("The new List is:" + list);
    }
}

Output

D:\Programs>javac LinkList.java

D:\Programs>java LinkList
The Current list is:[10, 20, 30, 40, 50]
The new List is:[3, 5, 10, 20, 30, 40, 50]