The document provides an overview of Java 2 Platform, Micro Edition (J2ME): J2ME is a Java platform for resource-constrained devices. It defines configurations like CLDC for very limited devices and CDC for more capable devices, as well as profiles like MIDP that add functionality. MIDP targets mobile information devices and defines APIs for user interfaces, storage, and networking. Developing for J2ME requires choosing a configuration and profile, then building a MIDlet application within their constraints.

1. Java 2 Platform, Micro Edition (J2ME) Masha Gutkhen Keren Gazit

9. Java Editions Java2 Standard Edition (J2SE™) Java2 Enterprise Edition (J2EE™) Java2 Micro Edition (J2ME™) Java 2 Platform Standard desktop & workstation applications Heavy duty server systems Small & memory constrained devices

17. Configurations Connected Limited Device Configuration Connected Device Configuration Configuration CLDC CDC

22. CLDC vs. CDC – J2SE Subset CDC CLDC J2SE

29. Profiles Mobile Information Device Profile Personal Digital Assistant Profile Foundation Profile Personal Basis Profile Personal Profile Profile MIDP PDAP PP PBP FP

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44. Creating a MIDlet

45. Creating a MIDlet Importing MIDP specific packages import javax.microedition.lcdui.*; import javax.microedition.midlet.*;

46. Creating a MIDlet Extends MIDlet Implements CommandListener public class HelloMIDlet extends MIDlet implements CommandListener {

47. Creating a MIDlet Creating the form, adding the Commands public HelloMIDlet() { mMainForm = new Form("HelloMIDlet"); mMainForm.append(new StringItem(null, "Hello, Seminar Software Design!")); mMainForm.addCommand(new Command("Exit", Command.EXIT, 0)); mMainForm.setCommandListener(this); }

64. Using KToolbar

66. Where to place your files? external class libraries, (JAR or ZIP) for all KToolbar projects. J2ME/apps/lib source files J2ME/apps/{proj}/src resource files J2ME/apps/{proj}/res external class libraries, (JAR or ZIP) for a specific project J2ME/apps/{proj}/lib JAR, JAD, unpacked manifest files. J2ME/apps/{proj}/bin source, resource, and binary files J2ME/apps/{proj}