Write a java program to check whether given string is
palindrome or not
import java.util.Scanner;
public class PalindromeChecker {
public
static void main(String[] args) {
Scanner
scanner = new Scanner(System.in);
System.out.print("Enter a string to check for palindrome: ");
String
input = scanner.nextLine();
if
(isPalindrome(input)) {
System.out.println("The entered string is a palindrome.");
} else
{
System.out.println("The entered string is not a palindrome.");
}
}
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;
}
}
