java coding to assort 3 number in ascending order

import java.util.Scanner;

public class op {

public static void main(String[] args) {

Scanner io= new Scanner(System.in);

System.out.print("please enter a number: ");

int num1=io.nextInt(); 

int num2=io.nextInt();

int num3=io.nextInt();

if (num1 > num2) {

     int num = num1;

     num1 = num2;

     num2 = num;

   }

   if (num2 > num3) {

     int num = num2;

     num2 = num3;

     num3 = num;

   }

   if (num1 > num2) {

     int num = num1;

     num1 = num2;

     num2 = num;

   }

   System.out.println("The numbers are " + num1 + " " + num2 + " " + num3);

 }

}