OOP) Calculator

public class Calculator {

    public Calculator(){

    }

    public int add (int a , int b){

        return (a + b);
    }

    public int subtract (int a , int b){

        return (a - b);
    }

    public int multiply (int a , int b){

        return (a * b);
    }

    public int divide (int a , int b){
        if ( b == 0){
            System.out.println("Error! Dividing by zero is not allowed.");
            return 0;
        } else {
            return (a / b);
        }
    }

    public int modulo (int a , int b){
        if ( b == 0){
            System.out.println("Error! Dividing by zero is not allowed.");
            return 0;
        } else {
            return (a % b);
        }
    }



    public static void main(String[] args) {

        Calculator myCalculator = new Calculator();
        System.out.println(myCalculator.add(5,7));
        System.out.println(myCalculator.subtract(45,11));
        myCalculator.divide(5,7);


    }
}