Add elements at beginning and end of LinkedList Java example

This java example shows how to add an element at beginning or at end of java LinkedList object using addFirst and addLast methods.

import java.util.LinkedList;

public class AddElementsAtStartEndLinkedListExample {

 public static void main(String[] args) {

  // create LinkedList object
  LinkedList lList = new LinkedList();

  // add elements to LinkedList
  lList.add("1");
  lList.add("2");
  lList.add("3");
  lList.add("4");
  lList.add("5");

  System.out.println("LinkedList contains : " + lList);

  /**
   * To add an element at the beginning of the LinkedList, use void
   * addFirst(Object obj) method.
   * 
   * This method inserts object at the beginning of the LinkedList.
   **/

  lList.addFirst("0");
  System.out
    .println("After inserting 0 at beginning, LinkedList contains :"
      + lList);

  /*
   * To append an element at end of the LinkedList, use void
   * addLast(Object obj) method.
   * 
   * This method append specified element at the end of the LinkedList.
   */

  lList.addLast("6");
  System.out.println("After appending 6 at end, LinkedList contains :"
    + lList);

 }
}

The output is:




LinkedList contains : [1, 2, 3, 4, 5]
After inserting 0 at beginning, LinkedList contains :[0, 1, 2, 3, 4, 5]
After appending 6 at end, LinkedList contains :[0, 1, 2, 3, 4, 5, 6]