Why can't I state the values of the constructor??

[jean28]

I am trying to write a code where I state the height and radius and then calculates the surface area and volume of a code.

These are the formulas:

Surface = sqrt(r^2 + s^2)
Surface area = pi * r * s + pi * r^2
Volume = (1/3) * pi * r^2 * h

I think I wrote the class correctly, but I get a few errors that say the I am not using the instance variables height and radius. Then when I try to state a variable in the tester, it says that the constructor is undefined.

Here are the classes:

public class IceCreamCone 
{
	private double height; // Says value height is not used.
	private double radius; // Says value radius is not used.
	private double area;
	private double volume;
	
	// Receives parameters; calculates surface area and volume.
	public void IceCreamCone(double h, double r)
	{
		height = h;
		radius = r;
	
		double s = Math.sqrt((r * r) + (h * h));
		area = (Math.PI) * (r) * (s) * + (Math.PI) * (r * r);
		volume = (1 / 3) * (Math.PI) * (r * r) * (h);
	}
	
	// Returns calculated area.
	public double getSurfaceArea()
	{
		return area;
	}
	
	// Returns calculated volume.
	public double getVolume()
	{
		return volume;
	}
}

public class IceCreamtester 
{
	public static void main(String[] args)
	{
		IceCreamCone jean = new IceCreamCone(2,1); //says constructor is undefined.
		
	
	}

}

Thanks!

[jean28]

I fixed a few things and now I can print the results, but now the results are wrong. What is wrong?

public class IceCreamCone 
{
	private double height; 
	private double radius; 
	private double area;
	private double volume;
	private double surface;
	
	// Receives parameters; calculates surface.
	public IceCreamCone(double h, double r)
	{
		height = h;
		radius = r;
	
		surface = Math.sqrt((radius * radius) + (height * height));
	}
	
	// Returns calculated area.
	public double getSurfaceArea()
	{
		area = ((Math.PI) * (radius) * (surface) * + (Math.PI) * (radius * radius));
		return area;
	}
	
	// Returns calculated volume.
	public double getVolume()
	{
		volume = ((1 / 3) * (Math.PI) * (radius * radius) * (height));
		return volume;
	}
}

public class IceCreamtester 
{
	public static void main(String[] args)
	{
		IceCreamCone jean = new IceCreamCone(2,1); //says constructor is undefined.
		System.out.println(jean.getSurfaceArea());
		System.out.println("Expected value: 10.16");
		System.out.println(jean.getVolume());
		System.out.println("Expected value: 2.09");
	
	}

}

22.069106351866907
Expected value: 10.16
0.0
Expected value: 2.09

[SJF]

        IceCreamCone jean = new IceCreamCone(2d , 1d );

[SJF]

Also, look at at your volume code!

HINT:

		double oneThird = 1/3;					//double = int/int  ~ (double)(int/int)
		System.out.println(oneThird);			// 0.0!
		oneThird = 1d/3;						//double = double/int ~ double/double
		System.out.println(oneThird);			// 0.33333333333!