Download Core J2ME Technology by John W. Muchow PDF

By John W. Muchow

With Nokia by myself saying deployment of one hundred fifty million telephones working Sun's J2ME and cellular info machine Profile (MIDP), developer curiosity in those applied sciences is big. Now, there is an authoritative, example-rich technical source that might let each Java developer to construct strong functions for any J2ME cellular equipment -- speedy. Written through one of many world's such a lot skilled Java builders and running shoes, this hands-on publication teaches J2ME and MIDP utilizing greater than 50 well-designed examples -- them all sincerely commented, completely defined, and to be had for obtain on the internet. center J2ME expertise covers every thing a developer must get effects. John Muchow starts with an summary of the J2ME, together with configurations and profiles; then walks you thru growing the entire J2ME improvement surroundings -- from downloading J2ME to troubleshooting. The publication then offers exhaustive insurance of the MIDP programming interface: the fundamentals of the MIDlet software lifecycle; occasion dealing with; low-level parts; chronic garage; networking (including communique with servlets and consultation management); and extra. The ebook additionally comprises complete references to either key parts of J2ME: MIDP and the hooked up restricted gadget Configuration (CLDC) specification. For all skilled Java builders who are looking to create cellular functions with J2ME.

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With Nokia by myself asserting deployment of one hundred fifty million telephones working Sun's J2ME and cellular info equipment Profile (MIDP), developer curiosity in those applied sciences is gigantic. Now, there is an authoritative, example-rich technical source that would allow each Java developer to construct powerful purposes for any J2ME cellular gadget -- quick.

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Extra resources for Core J2ME Technology

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Tells the pre-verifier where to put the verified class files. " specifies the current directory, the same location as the original class file. Important Note Using the above command line options, as written, will overwrite the original Java class file (from the Java compiler) with a new pre-verified class file (from the pre-verifier). You may want to separate the class files into two directories. One reason is, class files that are not pre-verified cannot be loaded by the application manager.

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). MIDlet-Icon Icon used by the application manager. Shown alongside the MIDlet-Name on the device.

As we move forward, it's essential that you understand how Java uses packages to help keep your code organized. Also, it's a good time to introduce a better means of keeping track of class files; that is, knowing which class files are produced by the Java compiler and which are the output of the preverifier. Following, we'll create a new directory hierarchy for our classes and will introduce a package statement into the Java code. Create the Directory Structure 1. Make a directory for the new project—I used the name Welcome Package, which I created as a subdirectory of c:\midlets.

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