/*
 *  ==========================================================================
 *  Sphere.java: Compute volume of sphere..
 *
 *  Written By: Mark Austin                                     November, 2006
 *  ==========================================================================
 */

import java.lang.Math;
import java.util.*;
import java.io.*;
import java.text.*;

public class Sphere {
    public static void main( String args[] ) {
        double dRadius, dVolume;
        String sLine;

        // Prompt user for radius of sphere...

        System.out.println("Please enter the sphere radius");
        System.out.print("Radius R: ");
        sLine   = getTextFromConsole();
        dRadius = Double.valueOf(sLine).doubleValue();

        // Check that radius is greater than or equal to zero.

        if ( dRadius < 0 ) {
           System.out.println("Input error: Radius must be positive....");
           return;
        }

        // Ccmpute and print volume and surface area

        dVolume = 4.0/3.0 * Math.PI * Math.pow( dRadius, 3.0);
        System.out.println("Sphere: Radius = " + dRadius );
        System.out.println("        Volume = " + dVolume );
    }

    /* 
     *  ============================================================
     *  Method getTextFromConsole(): Read line of text from keyboard
     * 
     *  Input  : None.
     *  Output : String sLine -- character string of keyboard input
     *  ============================================================
     */

    public static String getTextFromConsole() {
       String inLine = "";

       // Create buffered reader for keyboard input stream....

       BufferedReader inStream = new BufferedReader (
                                 new InputStreamReader(System.in));

       // Try to read input from keyboard ....

       try {
          inLine = inStream.readLine();
       } catch (IOException e) {
          System.out.println("IOException: " + e);
       }

       return inLine;
    }
}