Java中的回文数字

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

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