October 2007
Intermediate to advanced
496 pages
16h 50m
English
IBM has a compatible JDK: J9. Like the Sun JDK, J9 also supports popular operating systems, such as Linux, plus some that Sun doesn't support (e.g., AIX and z/OS). This JVM had the smallest disk installation footprint out of all of the compatible JDKs we tried. You can download its JDK from http://www.ibm.com/developerworks/java/jdk.
Here is how we installed the tar gzipped archive on Linux (as the
root user):
#cd /opt#tar zxvf ˜/ibm-java-sdk-60-linux-x86_64-20070329.tgz#chmod -R go+rx ibm-java2-x86_64-60#chown -R root.root ibm-java2-x86_64-60
Once it is installed, set JAVA_HOME and PATH like this:
#JAVA_HOME=/opt/ibm-java2-x86_64-60#export JAVA_HOME#PATH=$JAVA_HOME/bin:$PATH#export PATH
Then, check to make sure your java executable points to the JDK you just installed:
# which java
/opt/ibm-java2-x86_64-60Here's how it identified itself on one of our Linux computers:
$ java -version
java version "1.6.0-internal"
Java(TM) SE Runtime Environment (build 20070329_01)
IBM J9 VM (build 2.4, J2RE 1.6.0 IBM J9 2.4 Linux amd64-64 jvmxa6460-20070326_12091 (J
IT enabled)
J9VM - 20070326_12091_LHdSMr
JIT - dev_20070326_1800_dev
GC - 20070319_AA)