/* 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_01<T1 extends Number, T2 extends Number>{
    private T1 num1;
    private T2 num2;

    public Calculator_01( T1 num1, T2 num2 ){
        this.num1 = num1;
        this.num2 = num2;
    }

    public double add( ){
        double sum = num1.doubleValue() + num2.doubleValue();
        return sum;
    }

    public double multiply( ){
        double product = num1.doubleValue() * num2.doubleValue();
        return product;
    }

    public static void main( String[] args ){

        Calculator_01< Integer, Double > calc = new Calculator_01< Integer, Double >( 2, 3.141596 );
        System.out.println( calc.add() );
        System.out.println( calc.multiply() );

        Calculator_01< Double, Integer > calc2 = new Calculator_01< Double, Integer >( 2.71828, 7 );
        System.out.println( calc2.add() );
        System.out.println( calc2.multiply() );
    }
}