Once you've finished downloading J2SE 5.0, you'll need to install it.

Second, it includes a Java compiler and other tools that the toolkit uses to build your projects.

How does J2SE 5.0 help you develop wireless applications? First, it provides the Java platform upon which the Sun Java Wireless Toolkit runs. J2SE 5.0 is available for Linux, Solaris, and Windows. (You will sometimes hear developers refer to this as the JDK, or Java Developer's Kit, but the current name is J2SE 5.0) You can download the current version from here The current version is 1.5.0. You'll need J2SE 5.0 to form the foundation of your development environment. Installing the Java Platform, Standard Edition (J2SE SDK) jEdit is a very capable editor that runs in a Java 2 runtime and works well on different systems like Windows 2000 and Mac. Some Windows developers use Notepad, but you'll likely want something a little more sophisticated if you do much development work. On Unix-like systems, emacs or vi are popular choices. What editor you use is, of course, entirely up to you. This can be something as rudimentary as Notepad (on Windows) or something more elaborate like jEdit. (version 1.5.0 is now available to download)

Java Platform, Standard Edition version 1.4.2 or higher.

In this article, you'll assemble a development environment based on three pieces of software: MIDP development tools are available only for Windows environment. The Sun Java Wireless Toolkit can be integrated into IDEs but it can also run standalone, which is how I'll describe it in this article. In this article you'll use Sun's Sun Java Wireless Toolkit for CLDC which is both free and lightweight. The final step is creating a MIDlet that makes a network connection to the servlet. Most MIDlets will connect to some type of network service, so Part II of this tutorial describes how to set up a servlet development environment and how to write, compile, and test a servlet.

(For a background on wireless Java technology, read Introduction to Wireless.) The application you'll build, a MIDlet, runs on implementations of the Mobile Information Device Profile, one of the Java ME specifications. You'll learn how to install the development tools, how to write your first Java ME application, how to build it, and how to test the application in an emulator. This article contains everything you need to know to get started developing in the Java Platform, Micro Edition (Java ME) environment.

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