Class: Shape (superclass for all shape types)

instance Variables

• private int color;

Accesor Methods

• public double getArea(); What goes here?
• public int getColor()

Class: abstract Polygon3 extends Shape

(superclass of Triangle3, Polygon3)

Constructor

• public Polygon3(int sides) //this should use the paramater to initalize the instance varaible numSides

Instance Variables

• private int numSides

Accesor Methods

• no methods

Class: Triangle3 extends Polygon3

Constructor

• Public Triangle3( ) //this should initalize the instance variables of Polygon as shown below;
  

    public Triangle3(double b,double height)
    	{
      super(3);
  	base =b;
  	height h
      }
    

instance Variables

• double base
• double height

Accesor Methods //override each of the superclass

• public double getArea(); //returns the area of the triangle

Class: Circle extends Shape

Constructor

• Public Circle(double r) //this should initalize the radius to the value of r;

instance Variables

• private double radius;

Accesor Methods

• public double getArea(); //returns the area of the circle

Insightful Few Lines of Code

Shape s = new Triangle3();
Class: InteractiveMath3

I already implemented computeNetArea()

instance Variables

• ArrayList<Shape> shapes;

Accesor Methods

• public double computeNetArea(){ //@ returns the area of the rectangles, circles and triangles
• public void printColors()//loop over all objects, print each object's variables on a separate line .