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]
