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]



Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.




Practice Tags :

Recommended Posts:



0 Average Difficulty : 0/5.0
No votes yet.