J2ME Tutorials

What is J2ME?

J2ME is the short form for Java 2 Micro Edition. J2ME is meant for tiny devices such as mobile phones, TV set top boxes, Vehicle telematics, pagers, PDAs etc. 
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Types of configurations in J2ME

A configuration is supposed to represent the minimum platform for its target device and is not permitted to define optional features. Vendors are required to implement the specification fully so that developers can rely on a consistent programming environment and, therefore, create applications that are as device-independent as possible.
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Types of Profiles in J2ME

A profile complements a configuration by adding additional classes that provide features appropriate to a particular type of device or to a specific vertical market segment. Both J2ME configurations have one or more associated profiles, some of which may themselves rely on other profiles. These processes are described in the following list:
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Getting Started with J2ME

A brief introduction of what is J2ME? is a good place to getting started. As with any other technology J2ME has its own set of toolkits and IDEs.
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RMS Basics in J2ME

The RMS supports the creation and management of multiple record stores, shown in Figure below. A record store is a database whose central abstraction is the record. Each record store consists of zero or more records. A record store name is case sensitive and can consist of a maximum of 32 Unicode characters. A record store is created by a MIDlet.
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The MIDP Networking Model in J2ME

In MIDP, as in J2SE, IO streams are the primary mechanism available to applications to read and write streams of data. Both J2SE and J2ME have a java.io package that contains these stream classes. Additionally, the MIDP defines the javax.microedition.io package, which supports networking and communications for MIDP applications. This package is in contrast to the J2SE java.net package, which defines networking support on that platform. MIDP applications use the javax.microedition.io types to create and manipulate various kinds of network connections. They then read from these connections and write to them using the types in the MIDP java.io package, which contains a subset of the classes and interfaces in the J2SE java.io package.
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Internationalization Support in J2ME MIDP

Realistically, an i18n solution on any platform is somewhat constrained by the resources and API mechanisms available to applications. The ease with which a programmer can implement i18n support—and the comprehensiveness of that support—depends largely on the level of explicit support for the major areas of i18n development. The MIDP platform provides the following elements in support of i18n development:
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