PalindromeChecker.java

import java.util.Scanner;

public class PalindromeChecker {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("How many times would you like to try? Type 3: ");
        int attempts = scanner.nextInt();
        scanner.nextLine(); // Consume newline
        
        for (int i = 0; i < attempts; i++) {
            System.out.print("Enter a string (more than 10 characters): ");
            String input = scanner.nextLine();
            
            if (input.length() <= 10) {
                System.out.println("Input must have more than 10 characters.");
                continue;
            }
            
            if (isPalindrome(input)) {
                System.out.println("The string '" + input + "' is a palindrome.");
            } else {
                System.out.println("The string '" + input + "' is not a palindrome.");
            }
        }
        
        scanner.close();
    }
    
    public static boolean isPalindrome(String str) {
        str = str.replaceAll("[^a-zA-Z0-9]", "").toLowerCase(); // Remove non-alphanumeric characters and convert to lowercase
        int left = 0;
        int right = str.length() - 1;
        
        while (left < right) {
            if (str.charAt(left) != str.charAt(right)) {
                return false;
            }
            left++;
            right--;
        }
        
        return true;
    }
}