The Cartesian product of two sets A and B (also called the product set, set dire

Question

The Cartesian product of two sets A and B (also called the product set, set direct product, or cross product) is defined to be the set of all points where and . Implement a class that compute the Cartesian product of two sets A and B. Your class should define the following datafields and class properties:

• double [ ] setA

• double [ ] setB

• double [ ] [ ] ProductAB

• void CartesianProduct ( )

• void DisplayCartesianProduct ( )

a. Write a test program that read two sets A, B as inputs, compute the Cartesian product of A and B, and display the result.

b. Use the Cartesian product class to implement the cloneable interface. In your test program create a clone object using the clone method.

Explanation / Answer

1.

double[] cartesianProduct(double[] setA, double[] setB) {
    double[] ProductAB = new double[setA.length * setB.length];
    double index = 0;

    for (double v1: one) {
        for (double v2: two) {
            ProductAB[index] = v1 * v2;
            index++;
        }
    }

    return ProductAB;
}

2)

public class ProductCloneApp implements Cloneable
{
    private String code;
    private String description;
    private double price;
   
    // the code for the constructor and methods

    @Override
    public Object clone() throws CloneNotSupportedException
    {
        return super.clone();
    }

    public static void main(String args[]) throws CloneNotSupportedException
    {

        // create a new product
        Product p1 = new Product();
        p1.setCode("Cartesian product");
        p1.setDescription("Clone");
        p1.setPrice(49.50);

        // Cartesian product
        Product p2 = (Product) p1.clone();

        // change a value in the cloned product
        p2.setPrice(44.50);

        if (p1.getPrice() == p2.getPrice())
        {
            System.out.println("FAILURE: The clone method of the Product class is not cloning data.");
        }
        else if (p1.getPrice() != p2.getPrice())
        {
            System.out.println("SUCCESS: The clone method of the Product class is cloning data.");
        }
        System.out.println();
    }
}
}

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