By John W. Muchow
Center J2ME know-how and MIDP is the full builders' consultant to the Java 2 Platform, Micro version (J2ME) and the cellular info machine Profile (MIDP). J2ME is solar Microsystems' Java programming language subset for instant units, mobile telephones, PDAs, pagers, and different client electronics purposes. This booklet covers intermediate via complex J2ME and MIDP programming, with many code examples and attention on functional functions.
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Extra resources for Core J2ME Technology and MIDP
Manifest Attributes Purpose Name of the MIDlet suite. Version number of the MIDlet. Who developed the MIDlet. Reference to a specific MIDlet inside a MIDlet suite. This attribute contains up to three pieces of information: Required Yes Yes Yes Yes 1. MIDlet name 2. Icon for this MIDlet (optional) 3. Class name the application manager will call to load this MIDlet MicroEdition-Profile What J2ME Profile is required by the MIDlet(s). MicroEditionConfiguration What J2ME Configuration is required by the MIDlet(s).
Install the Toolkit as a stand alone application Create a New Project Once the installation is complete, launch the Toolkit. You should see a screen similar to that shown in Figure 4–12. Figure 4-12. The main project window of the Toolkit 47 Click on New Project and a dialog box will appear as in Figure 4–13. Enter the Project Name and MIDlet Class Name as shown. Figure 4-13. Creating a new project Configure the Project Settings Once you select Create Project, a new dialog box will appear that will allow you to specify the settings for the JAD and the manifest file (see Figure 4–14).
Figure 4-5. Welcome MIDlet Emulator Look and Feel When running a MIDlet, the look and feel of the emulator is related to the MIDP implementation you have installed. 0. If you have installed a more current version, or are running an implementation provided by a device manufacturer or third-party, the emulator display may look different than what you see here. However, the base functionality of the MIDlet will not be affected. The good news is, once you've developed a system for compiling, pre-verifying and previewing, not much changes.