Delete first and last element from a LinkedList in Java

The first element can be deleted from a LinkedList by using the method java.util.LinkedList.removeFirst(). This method does not have any parameters and it returns the first element of the LinkedList.

The last element can be deleted from a LinkedList by using the method java.util.LinkedList.removeLast(). This method does not have any parameters and it returns the last element of the LinkedList.

A program that demonstrates this is given as follows −

Example

 Live Demo

import java.util.LinkedList; public class Demo {    public static void main(String[] args) {       LinkedList<String> l = new LinkedList<String>();       l.add("Apple");       l.add("Mango");       l.add("Pear");       l.add("Orange");       l.add("Guava");       System.out.println("The LinkedList is: " + l);       l.removeFirst();       l.removeLast();       System.out.println("The LinkedList is: " + l);    } }

Output

The LinkedList is: [Apple, Mango, Pear, Orange, Guava] The LinkedList is: [Mango, Pear, Orange]

Now let us understand the above program.

The LinkedList l is created. Then LinkedList.add() is used to add the elements to the LinkedList. Then the LinkedList is displayed. A code snippet which demonstrates this is as follows −

LinkedList<String> l = new LinkedList<String>(); l.add("Apple"); l.add("Mango"); l.add("Pear"); l.add("Orange"); l.add("Guava"); System.out.println("The LinkedList is: " + l);

The methods LinkedList.removeFirst() and LinkedList.removeLast() is used to remove the elements at the beginning and end of the Linked List respectively. Then the LinkedList is again displayed. A code snippet which demonstrates this is as follows −

l.removeFirst(); l.removeLast(); System.out.println("The LinkedList is: " + l);