J2ME Programming

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J2ME Programming
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Recommended Books

• Programming Wireless Devices with the Java2
  Platform, Micro Second Edition (Paperback)by
  Roger Riggs (Editor), Antero Taivalsaari, Jyri
  Huopaniemi, Mark Patel, James VanPeursem, Aleksi
  Uotila
• Wireless J2ME Platform Programming (Paperback)by
  Vartan Piroumian

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Download J2SE 1.4.2 SDK

• To compile and run java, we firstly need to
  download the standard development kit (SDK) for
  J2SE (Java 2 Platform Standard Edition). The
  latest version of J2SE is 1.4.2.
• To download, visit http//java.sun.com/j2se/1.4.2
  /download.html, then
• 1. Click "Download J2SE SDK"
• 2. Select "Windows Offline Installation,
  Multi-language"
• 3. Execute the file "j2sdk-1_4_2_06-windows-i586-p
  .exe" to install.

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Download J2ME Wireless Toolkit 1.0.4

• Now, you can use Textpad to write J2SE programs.
  However, our goal is to write Java 2 Platform
  Standard Edition (J2ME) programs for mobile
  phones. Originally, you have to download CLDC 1.1
  and MIDP 2.0 for developing J2ME programs for
  mobile phones. Now, you can simply download J2ME
  Wireless Toolkit 2.2 which includes CLDC 1.1,
  MIDP 2.0 and interfaces to compile and run J2ME
  program.
• To download J2ME Wireless Toolkit 2.2, visit
  http//java.sun.com/products/j2mewtoolkit/download
  -2_2.html, then
• 1. Click "Download" at the bottom of the page.
• 2. Accept "Licence Agreement".
• 3. Select "Windows Platform" to download.
• 4. Execute the file "j2me_wireless_toolkit-2_2-win
  dows.exe" to install.

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Run Sample Program for J2ME.

• Now you can run sample J2ME programs. The steps
  are as follows
• 1. Launch the "ktoolbar" in the J2ME Wireless
  Toolkit.
• 2. Click "Open Project".
• 3. Select a Project to open (says Demos").
• 4. Click "Run".

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Run "HelloWorld" Console Program for J2ME

• In order to develop your own Program, you should
  know how to create a new Project using
  "ktoolbar". The steps to create a very simple
  project for a Basics1" program is a follows
• 1. Launch the "ktoolbar" in the J2ME Wireless
  Toolkit.
• 2. Click "New Project".
• 3. Type "Basics1" in both text boxes for "Project
  Name" and "Midlet Class Name".
• 4. Click "Create Project" and click "OK".

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Run "HelloWorld" Console Program for J2ME (Cont.)

• 5. You can see a sentence saying that the
  location of "Java source files".
• 6. Download the file "Basics1.java" and save to
  that location (something like "C\WTK22\apps\Basic
  s1\src").
• 7. Click "Build" to compile.
• 8. Click "Run" to execute the program.
• You will see the string "Hello World!" in the
  console after you click the "Launch" button in
  the mobile phone

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• .

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Run "HelloWorld" Application Program for J2ME

• Let's jump right in the water by creating a new
  project. Click on New Project in the button bar.
  The toolkit prompts you for a project name and
  the name of a MIDlet class in the project. Fill
  in HelloSuite and HelloMIDlet as shown below

• Once you fill in the project name and first
  MIDlet name, the toolkit gives you a chance to
  edit the project settings. Just accept the
  defaults for now press OK to finish creating the
  new project. In the text output pane of the J2ME
  Wireless Toolkit, you'll see several helpful
  messages telling you where to store the project's
  source files. On my machine, these messages are

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• Creating project "HelloSuite" Place Java source
  files in "C\WTK22\apps\HelloSuite\src" Place
  Application resource files in "C\WTK22\apps\Hello
  Suite\res" Place Application library files in
  "C\WTK22\apps\HelloSuite\lib" The toolkit stores
  each project in a subdirectory of the
  appsdirectory.
• The name of the subdirectory is the same as the
  name of the project. Here, the toolkit has
  created a new directory, c\WTK22\apps\HelloSuite.
  Each project subdirectory has a standard
  structure