Can I do it this way?

[phixion]

Here is the bit of code I am questioning:

double area = roundResult(cyl.getSurfaceArea());
double volume = roundResult(cyl.getVolume());

Can I pass a method as an argument? (or am I passing it as a parameter)

Here is the whole program. Does everything look okay?

import java.util.Scanner; //importing the Scanner class for use
public class TestCylinder
{
   
    public static void main(String[]args)
    {
        Scanner K = new Scanner(System.in); //creating a new instance of the Scanner class called K
        
         while(true)
         {
            System.out.print("Enter Cylinder Radius ans Width ie 4  5 "); //Prompt for user to input radius and width
            
            double radius = K.nextDouble(); //assigning the first number the user inputs to the variable radius
            double height = K.nextDouble(); //assigning the second number the user inputs to the variable height
            
            Cylinder cyl = new Cylinder(radius,height); //creating a new instance of the Cylinder class called cyl which accepts the parameters radius and height
                                
            [B]double area = roundResult(cyl.getSurfaceArea())[/B]; //creating a variable whos value is the result of getSurfaceArea passed as an argument to the roundResult method   
            [B]double volume = roundResult(cyl.getVolume());[/B] //creating a variable whos value is the result of getVolume passed as an argument to the roundResult method
                                                       
            System.out.println("Surface Area = " + area); //prints the value of the variable area
            System.out.println("Volume = " + volume); //prints the value of the variable volume                                                   
         }
    }
    public static double roundResult(double num)
    {
       num = num * 100; //num (the value of area/value passed as arguments) = num * 100; moving the decimal two places to the right
       num = Math.round(num); //rounding the value of num
       num = num / 100; //moving the decimal two places to the left
        
       return num; //returning the rounded result
    }
}

Any help is appreciated. Thanks in advance.

[milovan]

Does your program works. So far this looks OK.

[phixion]

Yes, everything works fine.

I just didn't know if I could pass a method as an argument like I did. Also, I wasn't sure if my comments accurately described what was happening in the code.

I'm sure there is an easier way of rounding, but that is what I have thus far. It seems to work okay.

[Fubarable]

You're not passing a method into another method, you're calling the method and passing its result which is fine to do.

[phixion]

Thank you.

[milovan]

What was your intention with roundResult()?
If you want to round the number with two decimals there are different ways.

[phixion]

Yes, my intention was to round the answer down to two decimal places. We haven't learned any other way of doing it at this point, so I did it that way. I am assuming the logic is correct.

[milovan]

It is OK as I said, later you could use DecimalFormat