题解 | 数字颠倒

import java.util.Scanner;


public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        String s = Integer.toString(n);
        for(int i = s.length()-1;i>=0;i--){
            System.out.print(s.charAt(i));
        }
    }
}

利用Integer的toString 函数去将整数转换成字符串