整型数字的逆序输出

 1 public class Dao{
 2     public static void main(String[]args){
 3         java.util.Scanner input=new java.util.Scanner(System.in);
 4         System.out.println("请输入要倒置的数字：");
 5         int a=input.nextInt();
 6          
 7         while(a!=0){
 8             int b=a%10;
 9             System.out.print(b);
10             a=a/10;
11         }
12     }
13 }

 1 import java.util.Scanner;
 2 
 3 public class Reverse {
 4     public static void main(String[] args) {
 5         System.out.print("请输入:");
 6 
 7         String str = String.valueOf(new Scanner(System.in).nextInt());
 8 
 9         for (int i = str.length() - 1; i >= 0; i--)
10             System.out.print(str.charAt(i));
11     }
12 }

 1 import java.util.Scanner;
 2 public class Reverse {
 3     public static void main(String[] args) {
 4         System.out.print("请输入:");
 5 
 6         Scanner input = new Scanner(System.in);
 7         int number = input.nextInt();
 8         System.out.println(new StringBuilder(String.valueOf(number)).reverse());
 9     }
10 }