3D shape

/**
 * Created by danie on 10/28/2016.
 */
public interface Shape3D {
    public double getVolume();
    public double getSurfaceArea();
}
 /*
                                                    Shape3D interface
            Things with two bases                |                      sphere            |                cones
 rectangular prism | triangular prism | cylinders|
        cube|



  */
/**
 * Created by danie on 10/30/2016.
 */
public class Cone implements Shape3D {
    private Circle c;
    private double height;
    public Cone(Circle circ, double h){
        c = circ;
        height = h;
    }
    public double getRadius(){
        return c.getRadius();
    }
    public double getVolume(){
        //πr2 h/3
        return c.area() + height/3;
    }
    public double getSurfaceArea(){
        //πr(r+ sqrt(h2+r2) )
        return c.area() + (Math.PI*c.getRadius())*(Math.sqrt(height*height + c.getRadius()*c.getRadius()));
    }
}


/**
 * Created by danie on 10/30/2016.
 */
public class Sphere implements Shape3D {
    private double radius;
    public Sphere(double r){
        radius = r;
    }
    public double getRadius(){
        return radius;
    }

    public double getVolume(){
        // 4/3 πr3
        return radius*radius*radius*Math.PI*4/3;
    }
    public double getSurfaceArea(){
        //4πr2
        return radius*radius*Math.PI*4;
    }
}

/**
 * Created by danie on 10/28/2016.
 */
public abstract class TwoBases implements Shape3D {
    private Shape base;
    private double height;
    public TwoBases(Shape base, double height){
        this.base = base;
        this.height = height;
    }
    public double getVolume(){
        return base.area() * height;
    }
    public double getSurfaceArea(){
        return height * base.perimeter() + 2 * base.area();
    }
}
/**
 * Created by danie on 10/30/2016.
 */
public class TriangularPrism extends TwoBases{
    public TriangularPrism(Triangle b, double h){
        super(b,h);
    }
}
/**
 * Created by danie on 10/30/2016.
 */
public class Cylinder extends TwoBases{
    private double radius;
    public Cylinder(Circle c, double h){
        super(c,h);
        radius = c.getRadius();
    }
    public double getRadius(){
        return radius;
    }
}
/**
 * Created by danie on 10/30/2016.
 */
public class RectangularPrism extends TwoBases {
    public RectangularPrism(Rectangle base, double height){
        super(base,height);
    }
}
/**
 * Created by danie on 10/30/2016.
 */
public class Cube extends RectangularPrism {
    public Cube(Square s, double h){
        super(s,h);
    }
}