Java Code Challenge: Palindrome Check

Discussion General
1

Write a Java function that determines if a given string is a palindrome. The function should return true if the input string is a palindrome and false otherwise. Palindromes are strings that read the same backward as forward, ignoring spaces, punctuation, and capitalization.

For example:

public class PalindromeChecker {
    public static boolean isPalindrome(String str) {
        // Your code goes here
        return false;
    }

    public static void main(String[] args) {
        // Example usage:
        System.out.println(isPalindrome("A man, a plan, a canal, Panama")); // Should print true
        System.out.println(isPalindrome("Java is fun")); // Should print false
    }
}

Provide a concise and efficient Java code solution along with any explanations or considerations. Feel free to include additional test cases to showcase the robustness of your solution. Thank you!

2

The function you need…

function isPalindrome(str) {
    const cleanStr = str.replace(/[^a-zA-Z0-9]/g, '').toLowerCase();

    let left = 0;
    let right = cleanStr.length - 1;

    while (left < right) {
        if (cleanStr.charAt(left) !== cleanStr.charAt(right)) {
            return false; // Characters don't match, not a palindrome
        }
        left++;
        right--;
    }

    return true; 
}


console.log(isPalindrome("A man, a plan, a canal, Panama")); // Should print true
console.log(isPalindrome("Java is fun")); // Should print false

Who needs such functions? What for? Who needs to know what is a PALINDROM and for what do i need a PALINDROME ?