import java.util.Scanner;
//给一个不多于5位的正整数,要求:一、求它是几位数,二、逆序打印出各位数字。
public class Test {public static void main(String[] args) {Scanner sc = new Scanner(System.in);int num = 0 ;String s = "0";System.out.println("请一个输入整数:");while (true) {s = sc.nextLine();try {num = Integer.parseInt(s);break;} catch (NumberFormatException e) {System.out.println("输入非法,请重新输入整数:");}}System.out.println(num+"整数的长度为:"+s.length());StringBuffer sb = new StringBuffer();sb.append(s);sb.reverse();System.out.println(sb.toString()); }
}