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This section gives you quick and dirty instructions on how to install the
IBM Developer Kit for Java, version 1.1.8 or 1.3.
You need the IBM Developer Kit for Java to run the DB2 Control Center
or Java applications or applets that connect to DB2.
Note that these instructions are not meant to replace the documentation
supplied with the IBM Developer Kit for Java.
| Warning |
For DB2 Version 7.1, you cannot use other versions of Java. Versions
of the Java Virtual Machine (JVM) supplied by other
software organizations are not supported.
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Installing the IBM Developer Kit for Java, Version 1.1.8
Download the IBM Developer Kit for Java, version 1.1.8, from the
IBM Java
Developer's Kit downloads web site. I'll assume that you
download the RPM package of the IBM Developer Kit for Java.
Install the IBM Developer Kit for Java by issuing the following command as root:
bash# rpm -ivh IBMJava118-SDK-1.1.8-2.0-i386.rpm |
I most recently tested IBM JDK 1.1.8 build 20010115a successfully on
Red Hat 6.2. To see which build of the IBM JDK you are using,
issue the java -fullversion command.
Add the following lines to your /etc/profile file to set
up the Java environment for all users:
export JAVA_HOME=/usr/jdk118
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib/classes.zip
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Note:
Caldera users should see Section 3.1.1 for instructions on
configuring the IBM Developer Kit for Java on Caldera OpenLinux.
Note:
Red Hat 7.1 enabled a floating point stack feature in the glibc library
that breaks the IBM JDK 1.1.8. Other distributions might follow their lead.
If the DB2 Control Center refuses to start successfully or your Java applications
do not work, you can disable the floating point stack by
setting the LD_ASSUME_KERNEL environment variable to
2.2.5 before running the DB2 Control Center as follows:
bash$ export LD_ASSUME_KERNEL=2.2.5
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Installing the IBM Developer Kit for Java, Version 1.3
Download the IBM Developer Kit for Java, version 1.3, from the
IBM Java
Developer's Kit downloads web site. I'll assume that you
download the RPM package of the IBM Developer Kit for Java.
Install the IBM Developer Kit for Java by issuing the following command as root:
bash# rpm -ivh IBMJava2-SDK-1.3-1.1-i386.rpm |
I most recently tested build cx130-20010329
successfully with Red Hat 7.1. To see which build of the
IBM JDK you are using, issue the java -fullversion command.
Add the following lines to your /etc/profile file to set
up the Java environment for all users:
export PATH=$PATH:/opt/IBMJava2-13/bin
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Note:
Caldera users should see Section 3.1.1 for instructions on
configuring the IBM Developer Kit for Java on Caldera OpenLinux.
IBM JDK 1.3 does away with the jre command, even if you
install the the IBM JRE 1.3 package.
However, the db2cc script calls the
jre command. The easiest solution is to create a link
called jre to the java executable
in the /opt/IBMJava2-13/bin directory
by issuing the following command as root.
bash# ln -sf /opt/IBMJava2-13/jre/bin/java /opt/IBMJava2-13/jre/bin/jre
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The db2cc script calls the jre command
with the -nojit argument, which is not supported in IBM JDK 1.3.
Remove the option by changing line 44 of /usr/IBMdb2/V7.1/bin/db2cc
to the following:
JRE_OPTIONS="-ss256k -mx128m -Ddb2path=$DB2PATH"
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