LinkedList addFirst() Method in Java

The java.util.LinkedList.addFirst() method in Java is used to insert a specific element at the beginning of a LinkedList.

Syntax:

void addFirst(Object element)

Parameters: This function accepts a single parameter element as shown in the above syntax. The element specified by this parameter is appended at beginning of the list.

Return Value: This method does not returns any value.

Below program illustrate the java.util.LinkedList.addFirst() method:

// Java code to illustrate addFirst() method of class LinkedList

import java.io.*;
import java.util.LinkedList;

public class LinkedListDemo {
    public static void main(String args[])
    {

        // creating an empty LinkedList
        LinkedList<String> list = new LinkedList<String>();

        // use add() method to add elements in the list
        list.add("Geeks");
        list.add("for");
        list.add("Geeks");
        list.add("10");
        list.add("20");

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

        // Adding new elements at the beginning
        list.addFirst("First");
        list.addFirst("At");

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

Output:

The list is:[Geeks, for, Geeks, 10, 20]
The new List is:[At, First, Geeks, for, Geeks, 10, 20]