The BlackBerry app Hello World

1. Installation of Blackberry_email_mds_4.1.4.exe and Blackberry_simulators_5.0.0.228_9700.exe

2. Install eclipse3.6

3. Install the BlackBerry Java Plug-in for Eclipse v1.1

4. Create a BlackBerry project, File-> New-> project-> BlackBerry-> BlackBerry Project

Project Name:helloworld

Click Finish to complete the project creation

5. Create a new Java class, named HelloWorld, which reads as follows:

Import Net.rim.device.api.ui.Field; Import net.rim.device.api.ui.UiApplication; Import Net.rim.device.api.ui.component.Dialog; Import Net.rim.device.api.ui.component.LabelField; Import Net.rim.device.api.ui.component.RichTextField; Import Net.rim.device.api.ui.container.MainScreen; public class HelloWorld extends UIApplication {public static void main (string[] args) {HelloWorld Theapp = new Helloworl D (); Theapp.entereventdispatcher (); Public HelloWorld () {Pushscreen (New Helloworldscreen ());}} Final class Helloworldscreen extends Mainscreen {helloworldscreen () {super (); LabelField title = new LabelField ("Hello world title", Labelfield.ellipsis | Labelfield.use_all_width); Settitle (title); Add (New Richtextfield ("Hello world!", field.non_focusable)); public void Close () {Dialog.alert ("goodbye!"); Super.close ();}}

6. Run the HelloWorld program in the BlackBerry Simulator

Select the HelloWorld item and right-click-> Run as-> BlackBerry Simulator

Click the menu button in the BlackBerry Simulator window that appears, and then click the Downloads icon, and the icon for the newly created HelloWorld application will appear, and click the HelloWorld icon to run the application. The HelloWorld program is to display a HelloWorld tag in the application window.