PalindromeCheckerAnswear
unknown
java
a year ago
963 B
2
Indexable
Never
public class PalindromeChecker { public static void main(String[] args) { System.out.println(isPalindrome("A man, a plan, a canal, Panama")); // true System.out.println(isPalindrome("racecar")); // true System.out.println(isPalindrome("hello")); // false } public static boolean isPalindrome(String str) { // Remove spaces and punctuation, and convert to lowercase String cleanedStr = str.replaceAll("[^a-zA-Z]", "").toLowerCase(); // Compare characters from both ends of the cleaned string int left = 0; int right = cleanedStr.length() - 1; while (left < right) { if (cleanedStr.charAt(left) != cleanedStr.charAt(right)) { return false; // Characters don't match, not a palindrome } left++; right--; } return true; // All characters matched, it's a palindrome } }