The document discusses the J2ME Wireless Tool Kit (WTK) and provides instructions on how to use it to create, build, run and package Java ME applications. It includes steps for starting KToolBar, creating and opening projects, modifying project attributes, writing a simple "Hello World" program, building, running and cleaning up projects, and adding external libraries. The WTK allows developers to create, test and package Java ME applications on desktop computers.

1. J2ME Wireless Tool Kit
(WTK)
Cornelius Koo - 2005

2. KToolBar
Start -> Programs -> J2ME Wireless ToolKit 2.0 -> KToolBar

3. Project File Organization

4. Create New Project

8. Open Existing Project

11. Editing MIDlet Suite
Attribute

13. Modifying MIDlet Suite
Attributes

15. Modifying User Defined
Attributes

17. Modifying MIDlet-Specific
Attributes

19. Simple Hello World

20. import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.TextBox;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
public class HelloWorld extends MIDlet {
private Display display;
public HelloWorld() {
display = Display.getDisplay(this);
}
protected void startApp() throws MIDletStateChangeException {
TextBox t = new TextBox(“Hello World MIDlet","Hello Small World",256,0);
display.setCurrent(t);
}
protected void pauseApp() {}
protected void destroyApp(boolean arg0) throws MIDletStateChangeException {}
}
Save this HelloWorld.java file at WTK20appsHello Worldsrc

21. Building Application

23. Running Locally

26. Cleaning Up Project

27. This will remove unnecessary files from project folder

28. Packaging

31. External Libraries

32. Place the .JAR files inside this /lib
directory for specific project.

33. Place the .JAR files inside this /lib
directory for all projects

34. Reference
• WTK User Guide. SUN Microsystem,
2003.