判断一个int是否是Java中的回文？

public class PalindromeChecker {
    public static boolean isPalindrome(int num) {
        String str = Integer.toString(num);
        String reversedStr = new StringBuilder(str).reverse().toString();
        return str.equals(reversedStr);
    }

    public static void main(String[] args) {
        int num = 12321;
        if (isPalindrome(num)) {
            System.out.println(num + " is a palindrome.");
        } else {
            System.out.println(num + " is not a palindrome.");
        }
    }
}