/* Write a generic Calculator class with two private fields to store two numbers and complete at least the methods below. Allow each of the numbers to be a different data type.
   
   Calculator< Integer, Double > calc = new Calculator< Integer, Double >( 2, 3.141596 );
   System.out.println( calc.add() );
   System.out.println( calc.multiply() );

   Calculator< Double, Integer > calc2 = new Calculator< Double, Integer >( 2.71828, 7 );
   System.out.println( calc2.add() );
   System.out.println( calc2.multiply() );   

Hint: Consider using the Number class, which is the parent class of Double, Integer, etc. Then, consider performing all math operations on double values (see the doubleValue() method). */

public class Calculator{

    public Calculator( ){
    }

    public double add( ){

        return sum;

    }

    public double multiply( ){

        return product;
    }

    public static void main( String[] args ){

        Calculator< Integer, Double > calc = new Calculator< Integer, Double >( 2, 3.141596 );
        System.out.println( calc.add() );
        System.out.println( calc.multiply() );

        Calculator< Double, Integer > calc2 = new Calculator< Double, Integer >( 2.71828, 7 );
        System.out.println( calc2.add() );
        System.out.println( calc2.multiply() );
    }
}