MIDP4PalmOS

MyHelloWorld: Creating simple MIDP application (MIDlet) step by step

The MIDP application (MIDlet), MyHelloWorld, is my first exercise in MIDP for PalmOS. I will show you the steps to creat Java application for Palm.

Step 1:

Run J2ME Wireless Tookit, KToolbar and click the New Project button.

Step 2:

Type MyHelloWorld on both Project name and MIDlet Class Name. And click Creat Project.

Step 3:

Settings for Project "MyHelloWorld" will be shown. Just accept the default settings by clicking on OK button.

Step 4:

KToolbar will create the project diredctories for you.

Your project will be in directory
C:\WTK104\apps\MyHelloWorld

You have to write your source file in
C:\WTK104\apps\src\MyHelloWorld\MyHelloWorld.java

Step 5:

Copy All the code inside below text box and save as
C:\WTK104\apps\MyHelloWorld\src\MyHelloWorld.java.

import javax.microedition.midlet.MIDlet; import javax.microedition.lcdui.*; public class MyHelloWorld extends MIDlet implements CommandListener { private Command exitCommand = new Command("Exit", Command.ITEM, 1); public void startApp() { Form form = new Form("My Hello World!"); form.append(new StringItem("Hello", "MIDP4PalmOS")); form.setTicker(new Ticker("http://www.oocities.org/midp4palmos/")); form.addCommand(exitCommand); form.addCommand(exitCommand); form.setCommandListener(this); Display.getDisplay(this).setCurrent(form); } public void pauseApp() {} public void destroyApp(boolean unconditional) {} /* * Respond to commands, including exit * On the exit command, cleanup and notify that the MIDlet has been destroyed. */ public void commandAction(Command c, Displayable s) { if (c == exitCommand) { destroyApp(false); notifyDestroyed(); } } }

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Step 6:

Click the Build button and Run button to start the emulation on your PC.
If all your settings of J2ME Wireless Toolkit and POSE are correct, a new session with MyHelloWorld of POSE will start.

Step 7:

After verified in POSE, you can Create Package.

KToolbar will generate the target .jar and .jad for you.
It will be in:
C:\WTK104\apps\MyHelloWorld\bin\

Step 8:

Now you can convert the .jad and .jar to PalmOS needed .PRC file.
Click File>Utilities...>
Select PalmOSEmulator
click Generate PRC button to call-up PRC Converter Tool
Browse C:\WTK104\apps\MyHelloWorld\bin\ and select MyHelloWorld.jad file.

Step 9:

OK, successful.

Now you can download the generated MIDlet, MyHelloWorld.prc, to your Palm as other Palm application. Make sure that you have already download MIDP.prc, MIDP for PalmOS, to your Palm before run the MIDlet.

If you want to try it firstly, it can be downloaded here:

	MIDP.prc in .zip
	MyHelloWorld.prc in .zip

MIDP4PalmOS

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