Shape Lab

Main

import java.util.ArrayList;


public class Main {

	public static void main(String[] args) {

		//Create ArrayList of Shapes
		ArrayList<Shape> myShapes=new ArrayList<Shape>();
		
		//Create Shapes
		Shape Rectangle = new Shape("Rectangle", "blue", 10, 20);
		Shape Circle = new Shape("Circle", "red", 10);
		Shape Square = new Shape("Square", "green", 20);
		Shape Triangle = new Shape("Triangle", "yellow", 30, 30, 30);
		
		//Store Shapes in myShapes		
		myShapes.add(Rectangle);
		myShapes.add(Circle);
		myShapes.add(Square);
		myShapes.add(Triangle);
		
		printShapes(myShapes);
	}
	
	public static void printShapes(ArrayList <Shape> myShapes){
		for (Shape shape : myShapes) {
			System.out.println(shape.toString());
		}
	}
}

Shape

import java.lang.Math;

public class Shape {

	private int dimension1, dimension2, dimension3;
	private String shape;
	private String color;
	private float area;
	
	public Shape(String shape, String color, int dimension1) {
		this.dimension1 = dimension1;
		this.shape = shape;
		this.color = color;
		calcArea(shape, dimension1);
	}
	//Overloaded constructor
	public Shape(String shape, String color, int dimension1, int dimension2) {
		this.dimension1 = dimension1;
		this.dimension2 = dimension2;
		this.shape = shape;
		this.color = color;
		calcArea(shape, dimension1, dimension2);
	}

	public Shape(String shape, String color, int dimension1, int dimension2, int dimension3) {
		this.dimension1 = dimension1;
		this.dimension2 = dimension2;
		this.dimension3 = dimension3;
		this.shape = shape;
		this.color = color;
		calcArea(shape, dimension1, dimension2, dimension3);
	}
	public void calcArea(String shape, int dimension1){
		
		if (shape.equalsIgnoreCase("square"))
			setArea(dimension1*dimension1);
		
		if (shape.equalsIgnoreCase("circle"))
			setArea(dimension1*dimension1*3.14159f);
	}
	//Overloaded method
	public void calcArea(String shape, int dimension1, int dimension2){
		setArea(dimension1*dimension2);
	}
	
	//Overloaded method
	public void calcArea(String shape, int dimension1, int dimension2, int dimension3){
		
		/*
		 * Area of a triangle = sqrt(s(s-a)(s-b)(s-c)) by Heron's Formula (or
		 * Hero's Formula), where a, b and c are the lengths of the sides of the
		 * triangle, and s = ½ (a + b + c) is the semi-perimeter of the
		 * triangle.
		 */
		
		if (shape.equalsIgnoreCase("triangle")){
			float s = (dimension1 + dimension2 + dimension3)/2.0f;
			float area = s*(s-dimension1)*(s-dimension2)*(s-dimension3);
			area= (float) Math.sqrt(area);
			setArea(area);
		}	
	}

	public int getDimension1() {
		return dimension1;
	}

	public void setDimension1(int dimension1) {
		this.dimension1 = dimension1;
	}

	public int getDimension2() {
		return dimension2;
	}

	public void setDimension2(int dimension2) {
		this.dimension2 = dimension2;
	}
	
	public int getDimension3() {
		return dimension3;
	}
	public void setDimension3(int dimension3) {
		this.dimension3 = dimension3;
	}

	public String getShape() {
		return shape;
	}

	public void setShape(String shape) {
		this.shape = shape;
	}

	public String getColor() {
		return color;
	}

	public void setColor(String color) {
		this.color = color;
	}

	public float getArea() {
		return area;
	}

	public void setArea(float area) {
		this.area = area;
	}

	@Override
	public String toString() {
		if (getDimension3()!=0)
			if (shape.equalsIgnoreCase("triangle")&&(getDimension1()+getDimension2())<=getDimension3())
				return "Impossible Triangle";
			else
				return "Shape [shape=" + shape + ", color=" + color + ", dimension1="
				+ dimension1 + ", dimension2=" + dimension2 + ", dimension3=" + dimension3 + ", area=" + area
				+ "]";
		
		if (getDimension2()==0)
		return "Shape [shape=" + shape + ", color=" + color + ", dimension1="
				+ dimension1 + ", area=" + area
				+ "]";
		
		return "Shape [shape=" + shape + ", color=" + color + ", dimension1="
		+ dimension1 + ", dimension2=" + dimension2 + ", area=" + area
		+ "]";
	}
}