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]
