Implemented Shape Hierarchy

Author: ahmedivy

Exercises/Chapter10/src/Exercise13/Circle.java

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+package Exercise13;
+
+public class Circle extends TwoDimShape {
+    private double radius;
+
+    public Circle(double radius) {
+        this.radius = radius;
+    }
+
+    @Override
+    public double getArea() {
+        return Math.PI * Math.pow(radius, 2);
+    }
+
+    public double getRadius() {
+        return radius;
+    }
+
+    public void setRadius(double radius) {
+        this.radius = radius;
+    }
+
+    @Override
+    public String toString() {
+        return "Circle [radius=" + radius + "]";
+    }
+}

Exercises/Chapter10/src/Exercise13/Cube.java

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+package Exercise13;
+
+public class Cube extends ThreeDimShape {
+    private double side;
+
+    public Cube(double side) {
+        this.side = side;
+    }
+
+    public double getSide() {
+        return side;
+    }
+
+    public void setSide(double side) {
+        this.side = side;
+    }
+
+    @Override
+    public double getArea() {
+        return 6 * Math.pow(side, 2);
+    }
+
+    @Override
+    public double getVolume() {
+        return Math.pow(side, 3);
+    }
+
+    @Override
+    public String toString() {
+        return "Cube [side=" + side + "]";
+    }
+}

Exercises/Chapter10/src/Exercise13/Shape.java

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+package Exercise13;
+
+public abstract class Shape {
+    public abstract double getArea();
+}

Exercises/Chapter10/src/Exercise13/Sphere.java

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+package Exercise13;
+
+public class Sphere extends ThreeDimShape {
+    private double radius;
+
+    public Sphere(double radius) {
+        this.radius = radius;
+    }
+
+    public double getRadius() {
+        return radius;
+    }
+
+    public void setRadius(double radius) {
+        this.radius = radius;
+    }
+
+    @Override
+    public double getArea() {
+        return 4 * Math.PI * Math.pow(radius, 2);
+    }
+
+    @Override
+    public double getVolume() {
+        return (4 / 3) * Math.PI * Math.pow(radius, 3);
+    }
+
+    @Override
+    public String toString() {
+        return "Sphere [radius=" + radius + "]";
+    }
+}

Exercises/Chapter10/src/Exercise13/Square.java

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+package Exercise13;
+
+public class Square extends TwoDimShape {
+    private double side;
+
+    public Square(double side) {
+        this.side = side;
+    }
+
+    public double getSide() {
+        return side;
+    }
+
+    public void setSide(double side) {
+        this.side = side;
+    }
+
+    @Override
+    public double getArea() {
+        return Math.pow(side, 2);
+    }
+
+    @Override
+    public String toString() {
+        return "Square [side=" + side + "]";
+    }
+}

Exercises/Chapter10/src/Exercise13/Test.java

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+package Exercise13;
+
+import java.util.ArrayList;
+
+public class Test {
+    public static void main(String[] args) {
+
+        ArrayList<Shape> shapes = new ArrayList<Shape>();
+        
+        shapes.add(new Circle(5));
+        shapes.add(new Square(5));
+        shapes.add(new Triangle(8, 3));
+        shapes.add(new Sphere(4));
+        shapes.add(new Cube(4));
+        shapes.add(new Tetrahedron(10));
+
+        for (Shape shape : shapes) {
+            System.out.println(shape + ":");
+            if (shape instanceof ThreeDimShape) {
+                System.out.printf("\tArea: %.2f%n", ((ThreeDimShape) shape).getArea());
+                System.out.printf("\tVolume: %.2f%n", ((ThreeDimShape) shape).getVolume());
+            } 
+            else if (shape instanceof TwoDimShape) {
+                System.out.printf("\tArea: %.2f%n", ((TwoDimShape) shape).getArea());
+            }
+        }
+    }
+}

Exercises/Chapter10/src/Exercise13/Tetrahedron.java

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+package Exercise13;
+
+public class Tetrahedron extends ThreeDimShape {
+    private double side;
+
+    public Tetrahedron(double side) {
+        this.side = side;
+    }
+
+    public double getSide() {
+        return side;
+    }
+
+    public void setSide(double side) {
+        this.side = side;
+    }
+
+    @Override
+    public double getArea() {
+        return Math.sqrt(3) * Math.pow(side, 2);
+    }
+
+    @Override
+    public double getVolume() {
+        return Math.pow(side, 3) / (6 * Math.sqrt(2));
+    }
+
+    @Override
+    public String toString() {
+        return "Tetrahedron [side=" + side + "]";
+    }
+}

Exercises/Chapter10/src/Exercise13/ThreeDimShape.java

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+package Exercise13;
+
+public abstract class ThreeDimShape extends TwoDimShape{
+    public abstract double getVolume();
+}

Exercises/Chapter10/src/Exercise13/Triangle.java

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+package Exercise13;
+
+public class Triangle extends TwoDimShape {
+    private double base;
+    private double height;
+
+    public Triangle(double base, double height) {
+        this.base = base;
+        this.height = height;
+    }
+    
+    public double getBase() {
+        return base;
+    }
+
+    public void setBase(double base) {
+        this.base = base;
+    }
+
+    public double getHeight() {
+        return height;
+    }
+
+    public void setHeight(double height) {
+        this.height = height;
+    }
+
+    @Override
+    public double getArea() {
+        return (base * height) / 2;
+    }
+
+    @Override
+    public String toString() {
+        return "Triangle [base=" + base + ", height=" + height + "]";
+    }
+}

Exercises/Chapter10/src/Exercise13/TwoDimShape.java

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+package Exercise13;
+
+public abstract class TwoDimShape extends Shape{
+    
+}