Question

public class Operations {

    private int add;
    private int sub;
    private int mul;
    private int div;
    private double sqrt;

    public void setadd(int a, int b) {
        add = a + b;
    }

    public void setsub(int a, int b) {
        sub = a - b;
    }

    public void setmul(int a, int b) {
        mul = a * b;
    }

    public void setdiv(int a, int b) {
        div = a / b;
    }

    public void setsqrt(double sqt) {
        sqrt = Math.sqrt(sqt);
    }

    public int getadd() {
        return add;
    }

    public int getsub() {
        return sub;
    }

    public int getmul() {
        return mul;
    }

    public int getdiv() {
        return div;
    }

    public double getsqrt() {
        return sqrt;
    }

}

Do I have to do a prototype of this or in Java that’s not necessary, also how do I use static methods here instead of setter and getter.. I’m trying to do a calculator.. Are my methods ok?

Answer 1

Make all the operations (addition, multiplication, division, etc ) static methods of a Calculator class:

   class Calculator{

     public static int add(int a, int b){
           return a+b;
     }
     ...