In this example we shall show you how to get the first and the last elements of a LinkedList. The LinkedList class provides methods for these operations. To get the first and the last elements of a LinkedList one should perform the following steps:
- Create a new LinkedList.
- Populate the list with elements, with
add(E e)API method of LinkedList. - Invoke the
getFirst() API method of LinkedList, that returns the first element in this list. - Invoke the
getLast()API method of LinkedList, to get the last element in the list,
as described in the code snippet below.
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | package com.javacodegeeks.snippets.core; import java.util.LinkedList; public class FirstLastElementsLinkedList { public static void main(String[] args) { // Create a LinkedList and populate it with elements LinkedList linkedList = new LinkedList(); linkedList.add("element_3"); linkedList.add("element_1"); linkedList.add("element_5"); linkedList.add("element_2"); linkedList.add("element_4"); // Object getFirst() method returns first element in LinkedList System.out.println("The first element of LinkedList is : " + linkedList.getFirst()); // Object getLast() method returns last element in LinkedList System.out.println("The last element of LinkedList is : " + linkedList.getLast()); }} |
Output:
The first element of LinkedList is : element_3
The last element of LinkedList is : element_4
This was an example of how to get the first and the last elements of a LinkedList in Java.
