With the advent of Java phones, there have been many changes, especially in writing programs for the mobile platform. J2ME technology has become the mainstream for all mobile devices. It allows you to simplify the programming procedure for mobile devices as much as possible and allows you to run the same programs on different platforms, be it Android, Symbian or a regular mobile phone.
Necessary
- - J2SE,
- - J2ME WT,
- - IDE or any word processor,
- - mobile phone for testing.
Instructions
Step 1
Over time, there has been a need to ensure the compatibility of various programs written by third-party programmers. To this end, a solution was proposed to create the Java 2 Platform Micro Edition, which became widespread. It has become the most popular independent platform for all mobile devices, regardless of OS. To start writing programs for a mobile phone, you need to install 3 necessary components: - J2SE (a compiler for creating Java archives), - J2ME Wireless Toolkit (a set of emulators for testing written MIDlets), - any IDE or ordinary text editor.
Step 2
Next, you need to launch the WTK Toolbar and create a new project (File - New project). You need to fill in the appropriate fields (project name, class name - you can name them at your discretion, but so that the name is as simple and memorable as possible). Then you don't need to change anything, just click OK. The new project will be created in the apps directory of the WTK program, where the bin folder is for executable files, the lib folder is for libraries, res is for resources, and src is for sources.
Step 3
After writing the program, as a rule, testing takes place. First, the application should be tested on the emulator, then it should be launched on the phone itself. First, the project needs to be compiled (the "Build" button of the WTK editor), then click Run. If the application started without problems, then to download it to the phone, it should be packed into a.jar and.jad archive. To do this, select the item "Project" - "Package", after which both archives will appear in the "bin" folder, which must be dropped onto the phone.
