What does the method addFirst(E e) do in java?

The addFirst(E e) method of the class java.util.LinkedList inserts the specified element at the beginning of this list.

Example:

public class LinkedListDemo {
   public static void main(String[] args) {
      LinkedList list = new LinkedList();
      list.add("Hello");
      list.add(2);
      list.add("Chocolate");
      list.add("10");
      System.out.println("LinkedList:" + list);
      list.addFirst("Element");
      System.out.println("LinkedList:" + list);
   }
}

Output:

LinkedList:[Hello, 2, Chocolate, 10]
LinkedList:[Element, Hello, 2, Chocolate, 10]