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About Ilias Tsagklis

Ilias Tsagklis
Ilias is a software developer turned online entrepreneur. He is co-founder and Executive Editor at Java Code Geeks.

Remove first and last element from LinkedList example

In this example we shall show you how to remove the first and the last element of a LinkedList. To remove the first and the last element of a LinkedList one should perform the following steps:

  • Create a new LinkedList.
  • Populate the list with elements, with the add(E e) API method of the LinkedLink.
  • Invoke the removeFirst() API method of the LinkedList. It removes and returns the first element of the list. Subsequent elements are shifted the to the left.
  • Invoke the removeLast() API method of the LinkedList. It removes and returns
    the last element of the list,

as described in the code snippet below.

package com.javacodegeeks.snippets.core;

import java.util.LinkedList;
 
public class RemoveFirstLastElementLinkedList {
 
  public static void main(String[] args) {
 
    // Create a LinkedList and populate it with elements
    LinkedList linkedList = new LinkedList();
    linkedList.add("element_1");
    linkedList.add("element_2");
    linkedList.add("element_3");
    linkedList.add("element_4");
    linkedList.add("element_5");
 
    System.out.println("LinkedList contains : " + linkedList);
 
    /*
     * Object removeFirst() operation removes and returns the first 
     * element of LinkedList. Subsequent elements are shifted the to 
     * the left
     */
     Object firstElement = linkedList.removeFirst();
     System.out.println(firstElement + " has been removed from LinkedList");
     System.out.println("LinkedList contains : " + linkedList);
 
     /*

* Object removeLast() operation removes and returns the last element 

* of LinkedList

*/

Object lastElement = linkedList.removeLast();

System.out.println(lastElement + " has been removed from LinkedList");

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

Output:

LinkedList contains : [element_1, element_2, element_3, element_4, element_5]
element_1 has been removed from LinkedList
LinkedList contains : [element_2, element_3, element_4, element_5]
element_5 has been removed from LinkedList
LinkedList contains : [element_2, element_3, element_4]

 
This was an example of how to remove the first and the last element of a LinkedList in Java.

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