Java Setup Notes

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Having a good environment setup is essential for everything you will be doing with Java ME - writing, compiling, packaging, debugging, obfuscating, tearing your hair out etc etc. Use the instructions here to setup your environment on Windows or OS X (currently experimental).

Java Wireless Toolkit

1. Java Standard Edition Development Kit (JDK) - you need to have some version of Java installed on your machine. Try to get version 1.4.2 (or later). This is essential for development. NOTE: You MUST have the JDK installed before you install the Java Wireless Toolkit as you will need the tools it contains (such as javac) to compile and run your MIDlets.
2. Download it here: http://java.sun.com/j2se/downloads/index.html. Get the version without any other bundled software. It should be called something like JDK 5.0 Update 8.
3. Java ME, Wireless Toolkit (WTK). This contains the essential tools that we need to build, package and install mobile applications. Download it here: http://java.sun.com/products/j2mewtoolkit/. Get the [J2ME Wireless Toolkit 2.2 http://java.sun.com/products/sjwtoolkit/download-2_2.html], or if you feel living on the bleeding edge - grab the Sun [Java Wireless Toolkit 2.5 for CLDC, Beta http://java.sun.com/products/sjwtoolkit/download-2_5.html](the toolkit formerly known as J2ME Wireless Toolkit). Careful, you may cut yourself.
4. I'm going to assume that you will install this into the

   C:\WTK\

   directory - if you install it somewhere else, just modify the paths accordingly.

Paths

To play nicely with the grown-ups, Java needs to know where all your files are, so we need to add the location of the Java binaries to the system path.

Windows 95/98

Go to Start->Run. Type in command. Then type

SET PATH=%PATH%;C:\WTK\bin

You should also edit your C:\autoexec.bat file to include this line, so you don't have to enter it every single time you restart your computer. After you've done this, you should be able to run the tools included in the Java Wireless Toolkit from any directory on your system.

Windows 2000/XP

1. Go to Control Panel -> System.
2. Click on the Advanced Tab
3. Click on the Environment Variables button
4. Double-click the PATH variable in the System variables box
5. At the end of the Variable value field, add the path to your J2ME WTK installation - for me this is something like ;C:\WTK
6. If you had to install the J2SE SDK too, it's a good idea to add the paths for that as well - for me this was C:\j2sdk1.4.2_03;C:\j2sdk1.4.2_03\bin.

A good way to test if this worked is to type the preverify command without any arguments in the command line. You should see something like this on your screen.

C:\> preverify<br />
Usage: PREVERIFY.EXE [options] classnames|dirnames ...<br />
<br />
where options include:<br />
   -classpath <directories separated by ';'><br />
                  Directories in which to look for classes<br />
   -d <directory> Directory in which output is written <br />
   @<filename>    Read command line arguments from a text file.<br /> 

Emulators

Windows

Depending on your target device, you should download and install the SDK for that particular handset or family of handsets from the manufacturer's site. Since this course is based around the Nokia Series 60 handsets, we're going to grab the Nokia Series 60 2nd Edition SDK, Feature Pack 2 and 3 as well as the Nokia Series 60 3rd Edition SDK (for the N80). You'll also need to get serial numbers for these SDKs, so don't forget to request those as well. Download them from here:

Series 60 SDKs

Mac OS X

None of the manufacturers have bothered to port their SDKs for the Mac, and neither has Sun, but there is a way to develop MIDP 1.0 and 2.0 applications using Apache Ant, MPowerplayer MIDP 2.0 SDK and J2ME Polish. Get 'em while they're hot:

Apache Ant

1. Download Apache Ant from http://download.nextag.com/apache/ant/binaries/apache-ant-1.6.5-bin.tar.gz
2. Save it somewhere easy and memorable - on my machine I save all my downloaded source files to

   /Users/michael/src

3. Here is the process. To try keep things clean, we're going to be installing into /usr/local.

tar -zxvf apache-ant-1.6.5-src.tar.gz
cd /usr/local
sudo mkdir ant
cd ant
sudo cp -R ~/src/apache-ant-1.6.5/bin .
sudo cp -R ~/src/apache-ant-1.6.5/lib .

1. Set up the paths in your environment

pico ~/.bash_login

Add these lines somewhere

export ANT_HOME=/usr/local/ant
export JAVA_HOME=/Library/Java/Home
export PATH=${PATH}:${ANT_HOME}/bin

Shut down your shell, open it up again and type

ant

You should see something like this 

Buildfile: build.xml does not exist!
Build failed

This means that Ant is installed and we're ready to roll.

MPowerplayer MIDP 2.0 SDK

1. Download this from http://www.mpowerplayer.com/products-sdk.php
2. Save the file somewhere in your src folder and unzip it. On my machine this looked like this:

/Users/michael/src/mobile/mpp-sdk

1. [Optional] I like making shortcuts so that it's easy for me to run the application. Fire up your favourite editor and type this

java -jar /Users/michael/src/mobile/mpp/player.jar $1