Integer Reverse

import java.util.Scanner;

public class IntegerReverse {
//testing method
public static void main(String[] args) {


Scanner input = new Scanner(System.in);
    System.out.println("请输入一个整数：");
    int in = input.nextInt();
    System.out.print(reverse(in));
  
}


//reverse input integer method
public static int reverse(int aa){
int num=0;

if(aa>=0){
while(aa>0){

num=num*10+aa%10;
aa=aa/10;

    }
return num;

     }else {

    int aa2=Math.abs(aa);
    while(aa2>0){
   
    num=num*10+aa2%10;
    aa2=aa2/10;

    }
    return -num;
     }


}

}