用java2. 回文数字：用户从键盘输入一个整数，程序将判断这个数是否是回文数。回文数是指将该数含有的数字逆序排列后得到的数和原数相同，例如12121、3223都是回文数。

import java.util.Scanner;

public class PalindromeNumber {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Please enter an integer: ");
        int number = scanner.nextInt();
        if (isPalindromeNumber(number)) {
            System.out.println(number + " is a palindrome number");
        } else {
            System.out.println(number + " is not a palindrome number");
        }
        scanner.close();
    }

    private static boolean isPalindromeNumber(int number) {
        int reversedNumber = 0;
        int remainder;
        int originalNumber = number;
        while (number > 0) {
            remainder = number % 10; // Get the last digit
            reversedNumber = reversedNumber * 10 + remainder; // Add the last digit to the reversed number
            number = number / 10; // Remove the last digit from the original number
        }
        return originalNumber == reversedNumber;
    }
}