I need help with this Java problem as it's explained in the image below: 

Palindrome (Deque)

A palindrome is a string that reads the same backwards and forwards. Use a deque to implement a program that tests whether a line of text is a palindrome. The program reads a line, then outputs whether the input is a palindrome or not.

Ex: If the input is:

senile felines!

the output is:

Yes, "senile felines!" is a palindrome.

Ex: If the input is:

rotostor

the output is:

No, "rotostor" is not a palindrome.

Ignore punctuation and spacing. Assume all alphabetic characters will be lowercase.

Special case: A one-character string is a palindrome.

Hint: The deque must be a Deque of Characters, but ordinary chars will be automatically converted to Characters when added to the deque.

Java Code: 

import java.util.Scanner;

import java.util.LinkedList;

import java.util.Deque;

public class LabProgram {

    public static void main(String[] args) {

        Scanner scnr = new Scanner(System.in);

        String line = scnr.nextLine();

        // Remove all non-alphabetic characters and convert to lowercase

        line = line.replaceAll("[^a-zA-Z]", "").toLowerCase();

        Deque<Character> deque = new LinkedList<>();

        // Add characters to the deque

        for (char c : line.toCharArray()) {

            deque.addLast(c);

        }

        boolean isPalindrome = true;

        // Compare characters at both ends

        while (deque.size() > 1) {

            char first = deque.removeFirst();

            char last = deque.removeLast();

            if (first != last) {

                isPalindrome = false;

                break;

            }

        }

        if (isPalindrome) {

            System.out.println("Yes, \"" + line + "\" is a palindrome.");

        } else {

            System.out.println("No, \"" + line + "\" is not a palindrome.");

        }

    }

}