Scanner not working

Question

I’m trying to do a little programming, but the scanner doesn’t seem to be working.

Whenever I put to print it returns 0 independent of the numbers, which was to return the highest number.

It works normal in the View class, but wanted to implement the Controller.

CODE:

Java controller.

import java.util.Scanner;
public class Controller {
  int num1, num2;

  public void getNums (){
    Scanner scan = new Scanner(System.in);
    num1 = scan.nextInt();
    num2 = scan.nextInt();
  }
}

Maiornumero.java

public class MaiorNumero {
  public int maiorNumero (int num1, int num2)
  {
    if (num1 > num2){
      return num1;
    }
    else {
      return num2;
    }
  }
}

View.java

public class View extends Controller {

  public void requestNums(){
    System.out.println("1º e 2º Número"
    +"\nex. 1 2"
    +"\n:");
  }

  public void printMaior(){
    MaiorNumero mn = new MaiorNumero();
    System.out.println(mn.maiorNumero(num1, num2));
  }
}

Answer 1

First of all, I don’t know which MVC model you are using, but in my projects the View module never extends the controller, each of the modules must be completely independent! In your View class, in the printMaior() method you are calling the higher methodNumer and you pass two variables at 1 and 2 that have not yet been initialized (at least in the code you entered here). Try calling getNums before most:

public void printMaior(){
    MaiorNumero mn = new MaiorNumero();
    this.getNums();
    System.out.println(mn.maiorNumero(num1, num2));
  }