import javax.swing.JOptionPane;

public class Pyramid {

public static void main(String[] args) {

// decalre variables

String input;

double radius, slant_height, height, volume, lateral_surface_area, base_area, Total_area;

input = JOptionPane.showInputDialog("Enter radius");

radius = Double.parseDouble(input);

input = JOptionPane.showInputDialog("Enterheight");

height = Double.parseDouble(input);

if (radius < 0 || height < 0)

JOptionPane.showMessageDialog(null, "Invalid inputs");

else {

//Calculate

volume = (1 / 3.0) * radius * radius * height * Math.PI;

slant_height = Math.sqrt(height * height + radius * radius);

lateral_surface_area = slant_height * radius * Math.PI;

base_area = Math.PI * radius * radius;

Total_area = lateral_surface_area + base_area;

//output

String resultMessage = "Volume : " + String.valueOf(volume) + " Height : " + height + "Slant Height"

+ slant_height + " Lateral Surface Area:" + String.valueOf(lateral_surface_area)

+ "Base Surface Area:" + String.valueOf(base_area) + " Total Surface Area : "

+ String.valueOf(Total_area);

JOptionPane.showMessageDialog(null, resultMessage);

}

}

}

Modify the program I have completed

Step 1: Write four method definitions as follows:

The first method takes the radius and height

as the parameters, then

calculates and returns the

slant height.

The second method takes the radius and height as the parameters, then calculates and returns the volume.

The third method takes the radius and slant height as the parameters, then calculates and returns the total surface area.The fourth method takes the radius, height, slant height, volume, and total surface area as the parameters, then prints the result.

Step 2: In the main method, the program does the following:

It prompts the user to enter the radius and height

.

If the user input is valid, it calls the four methods with appropriate arguments to calculate and

print the result. Otherwise, prints an error message.

Format the result to 2 decimal places.

Sample Run:

Enter radius:

12.34

Enter height:

23.45

********* Result ****************

Slant Height = 26.50

Volume = 3,739.40

Total Surface Area = 1,505.67