Software Dependencies for Development

To set up a complete development toolchain for J2ME development, you should install:

• the latest 1.6.X JDK - You MUST install a 32 bit version because the Sun/Oracle WTK, samsung, and nokia J2ME emulators are only available in 32-bit.
• The Sun/Oracle Wireless Toolkit (WTK) - Unfortunately, as of version 3.0.x, this is only provided for Windows and Mac environments. Because the developers of this project primarily use GNU/linux, we standardized on version 2.5.2, for which there is a 32-bit linux version.
• Apache Ant (version 1.8.X is fine)
• A 32-bit version of eclipse (optional)- We’ve been developing with Eclipse IDE for Java Developers Indigo (v 3.7.1). Of course, you can use any other IDE or text editor. We provide some notes below on getting eclipse set up for j2me development.

Setting/Fixing the Path to Java in WTK

In WTK 2.5.2, on both windows and linux, the path to your JAVA_HOME/bin/java executable gets hard-coded into all the executable wrapper scripts in WTK_HOME/bin. You may need to change these paths for any of the following reasons:

• you install a newer JRE/JDK, which lives in a different directory
• your default system JDK is 64-bit. WTK only works on 32-bit JREs. On a 64-bit system, if your JAVA_HOME points to a 64-bit JDK or you launch the WTK installer from a 64-bit java, the path to your 64-bit java executable may get hard-coded into all the WTK scripts at installation time.

linux

On linux, all the shell scripts, e.g., the WTK_HOME/bin/emulator script, set the path to your JRE/JDK bin directory like this:

javapathtowtk=/opt/java/current_64/bin/

On linux, if the JAVA_HOME/bin configured in the scripts is e.g., /opt/java/current_64/bin, and you want to set it to /opt/java/current_32/bin, you can fix this with something like:

cd /path/to/your/wtk_home/bin
find . -executable -type f \
    | xargs -L1 awk '/bin\/sh/ {if(NR>1){exit}; print FILENAME}' \
    | xargs grep -l '^javapathtowtk=' \
    | xargs sed -i '/^javapathtowtk=/ s!=/opt/java/current_64/bin/!=/opt/java/current_32/bin/!'

windows

On windows, WTK configures the path to your JDK/JRE in *.vm files in your WTK_HOME/bin directory at installation time.

If you want to change the configured java and your desired JDK/JRE is in the JAVA_HOME variable, you can do this with the following code in bash running from cygwin (note, JAVA_HOME must not have any trailing slashes for the following code to work):

cd /path/to/your/wtk_home/bin
WTK_JAVA_HOME=`cygpath -d "$JAVA_HOME" |sed 's/\\\\/\\\\\\\\/g'`
ls *.vm |xargs -L1 sed -i "s/^[^ ]*/${WTK_JAVA_HOME}\\\\bin\\\\java/"