Share on Google+Share on Google+

1 Answer(s)      8 years ago
Posted in : Java Beginners


View Answers

August 27, 2008 at 7:03 PM

Hi friend,

import javax.swing.*;
import javax.swing.JOptionPane;

public class CylinderTest {
public final static double PI = 3.1415927;
public static void main(String[] args) {
double radius = validateDouble("Please enter radius value.", "Input Radius");
double height = validateDouble("Please enter height value.", "Input Height");
double volume = calculateVolumeOfCylinder(radius, height);
double surfaceArea = calculateSurface(radius, height);

"The volume of the cylinder is " + volume +
" and the surface area is " + surfaceArea,"Results", JOptionPane.INFORMATION_MESSAGE);
//Calculate volume of cylinder given its radius and height.
public static double calculateVolumeOfCylinder(double radius, double height) {
return PI * radius * radius * height;

//Calculate surface area of cylinder given its radius and height.

public static double calculateSurface(double radius, double height) {
return 2 * PI * radius * radius + 2 * PI * radius * height;

public static double validateDouble(String prompt, String titleBar) {
boolean isValid = false;
String inputString = null;
double input = 0.0;

do {
inputString = JOptionPane.showInputDialog(null, prompt, titleBar, JOptionPane.QUESTION_MESSAGE);
isValid = (inputString != null);
if (isValid) {
// Convert inputString to type double
try {
input = Double.parseDouble(inputString);
catch (NumberFormatException ex) {
JOptionPane.showMessageDialog(null, "Invalid input value.", "Error: Invalid Input", JOptionPane.ERROR_MESSAGE);
isValid = false;
// Now check to see if the input is greater than zero
if (isValid && input <= 0.0) {
JOptionPane.showMessageDialog(null, "Input value must be greater than zero.",
"Error: Invalid Input", JOptionPane.ERROR_MESSAGE);

// Set flag to false
isValid = false;
while (!isValid);
return input;




Related Tutorials/Questions & Answers:  Create a class called that contains two double-precision instance variables named radius and height. The class should include a constructor that initializes the radius and height variables. Also, you - Java Beginners  the java program that calculate cylinder.  Hi friend, import*; import javax.swing.*; import javax.swing.JOptionPane; public class CylinderTest { public final static double PI
Java - Java Beginners
Java  I've been trying to figure out this program but I keep getting errors and its not working out. Can someone help me? this is the program Create a class called that contains two double-precision instance
Java Spring Hibernate Struts Training What does core Java include? java What are some way to learn Java quickly? Is it required to learn Java before learning Java Script? Is it necessary to learn java script before learning PHP? Are HTML5 and Java Script boosts Java career? Is Java object oriented? Fingerprint application with Java Uninstall Oracle Virtual Box JSON to HashMap Free Java online Training I want example of Control Statement in Java ANSI Color Codes with Python Create a Program that Calculates Input What is difference between JDK,JRE and JVM? How to see ubuntu version on server? How to get Page Source in Selenium (WebDriver) using Java? The path to the driver executable must be set by the webdriver.gecko.driver system property parse data from a link in java Java Program Qns using BlueJ How to fix HAX Kernel Module Is Not Installed error? Installing Audacity Looking for code Logic to check track changes & Coments in MSWord, MSWordx, MSExcel, MSExcelx is ON/OFF Installing JDK on Mac SAX Parser exception ERROR 601 (42P00): Syntax error. Encountered Thread java.lang.NoClassDefFoundError: org/apache/commons/fileupload/FileItemFactory How to install Ubuntu 16.04 LTS? HttpServletRequest cannot be resolved to a type in eclipse - Solved Unhandled event loop exception GC overhead limit exceeded Spring Data jpa with apache phoenix Caused by: java.lang.IllegalArgumentException: Not a host:port pair: PBUF o.a.h.h.z.RecoverableZooKeeper - Possibly transient ZooKeeper, quorum= com.thinkaurelius.titan.diskstorage.hbase.HBaseStoreManager class not found com.thinkaurelius.titan.diskstorage.hbase.HBaseStoreManager not found How to download and install Java 8 on Windows? How to uninstall JDK 7? How to install gtk-doc-tools package in Ubuntu? How to install Oracle JDK 8 on Ubuntu? ejabberd_ctl.beam not found - Solved How to convert date to UTC format in Java? How to install autoconf, automake and libtool in Ubuntu 15.10? How to convert current date to mm dd yyyy format in Java? How to convert current date to dd mm yyyy format in Java? How to stop window closing in "internalFrameClosing" event. How to find list of all index in Neo4j? file location SASLError using PLAIN: not-authorized how to convert war file into .exe file using java code


Advertisement null