The program is simply supposed to do calculations based on the users answer (but NOT if answer is >0 then do this, else do that), the users answer must be specific. What I have so far to ask the question is: import java.io.*; public class VolumeCalculator { public static void main (String[] args) throws IOException { String radius; DataInputStream keyboard = new DataInputStream(System.in); System.out.println("What is the radius of the sphere?: "); radius = keyboard.readLine(); _________________________ What I'm trying to make a simple math calculator for the volume of a sphere but I'm having trouble because I can't seem to find out which code uses the users answer and puts in in the formula volume = ( 4.0 / 3.0 ) * Math.PI * Math.pow( radius, 3 ); I know how to put the ending of the code together and add in the formula, but what is the code to use the users input because I'm getting an error saying that "keyboard.readLine" doesn't read integers or something of the sort. Maybe a little confusing... Sorry!

I can't say with authority. But mis-typed numerical values seems plausible. http://stackoverflow.com/questions/14526157/java-sphere-volume-calculation Hope this helps a bit! :) Cheers! -- Smug

I think you're over-complicating this a bit. Try adding an EditText field to the XML file for your plugin/activity. Then, in your java file, add this after you've inflated the XML file: //////////// EditText userInput = thisScreensView.findViewById(R.id.editTextId); Int userInputAsInteger = Integer.parseInteger(userInput); //////////// Make sure you've set the EditText "id" property in the XML file to "editTextId" (or change the code above to reflect your actual id). Also, make sure you've inflated the XML file into a View object with the name "thisScreensView". You can then manipulate "userInputAsInteger" however you need.

Ah I figured it out! I changed the string radius; to string inputradius; and added this after keyboard.readline to change the answer to a integer and double value: radius = Double.valueOf(inputradius).doubleValue(); Thanks everyone!

Glad u got it figured out!