By Sing Li; Jonathan Knudsen
Have you ever considered development video games to your cellphone or different instant units? even if you're a first-time instant Java developer, or an skilled expert starting J2ME, 3rd variation brings fascinating instant and cellular Java program improvement correct on your door! This booklet will empower you with a variety of issues: sound HTTPS aid, consumer interface API improvements, sound / song API, a video game API, 3D pix, and Bluetooth. additional, this booklet is straightforward to learn and contains many functional, hands-on, and ready-to-use code examples.
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Additional resources for Beginning J2ME, 3rd Edition: From Novice to Professional
When the MIDlet is about to be run, an instance is created. The MIDlet’s constructor is run, and the MIDlet is in the Paused state. 2. Next, the MIDlet enters the Active state after the application manager calls startApp(). 3. While the MIDlet is Active, the application manager can suspend its execution by calling pauseApp(). This puts the MIDlet back in the Paused state. A MIDlet can place itself in the Paused state by calling notifyPaused(). 4. While the MIDlet is in the Paused state, the application manager can call startApp() to put it back into the Active state.
We’ll cover the subjects that we skimmed in the last chapter, starting with the MIDlet life cycle and continuing through to a full discussion of MIDlet packaging. The chapter concludes with a look at the MIDlet security architecture. MIDlet class. MIDlets have a specific life cycle, which is reflected in the methods and behavior of the MIDlet class. A piece of device-specific software, the application manager, controls the installation, execution, and life cycle of MIDlets. MIDlets have no access to the application manager.
If all goes well, you’ll see something like the window shown in Figure 2-2 in the next section. Congratulations! You’ve just built and run your first MIDlet. info CHAPTER 2 ■ BUILDING MIDLETS Using the Emulator Controls The J2ME Wireless Toolkit emulator appears as a generic mobile phone, as shown in Figure 2-2. Figure 2-2. Buttons on the J2ME Wireless Toolkit emulator SUN’s J2ME Wireless Toolkit emulator exhibits several qualities that you are likely to find in real devices: • The device has a small screen size and limited input capabilities.