Java

OOP GUIDE / WORK

CIRCLE CLASS 2

Topics

• Instance variables
• Constructors
• Constructor overloading
• Using objects as parameters

TASK – PART 1 – SETTING UP THE POINT CLASS

Copy and paste the following Point class into your IDE to use it in this problem.

public class Point

{

   public double x;

public double y;

public Point(double tx, double ty)

   {

x = tx;

y = ty;

   }

public Point()

{

       x = 0.0;

       y = 0.0;

   }

}

TASK – PART 2 – CIRCLE CLASS

Create a Circle class.

The only data we need to store is the circle's radius.

Constructor #1: A constructor that gets a value for radius and creates the circle.

Constructor #2: A constructor that gets no parameters and creates a unit circle – essentially a circle with a radius of 1.

Constructor #3: A constructor that gets two Point objects. It then calculates the distance between the two points and creates a circle with that information.

TASK – PART 3 – TESTING THE CIRCLE CLASS

Create the class. Test it inside the main function of another class.