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. |
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 |
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 |
Note: Caldera users should see Section 3.1.1 for instructions on configuring the IBM Developer Kit for Java on Caldera OpenLinux.
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 |
Add the following lines to your /etc/profile file to set up the Java environment for all users:
export PATH=$PATH:/opt/IBMJava2-13/bin |
Note: Caldera users should see Section 3.1.1 for instructions on configuring the IBM Developer Kit for Java on Caldera OpenLinux.
IBM JDK 1.3 does away with the jre command, even if you install the the IBM JRE 1.3 package. However, the db2cc script calls the jre command. The easiest solution is to create a link called jre to the java executable in the /opt/IBMJava2-13/bin directory by issuing the following command as root.
bash# ln -sf /opt/IBMJava2-13/jre/bin/java /opt/IBMJava2-13/jre/bin/jre |
The db2cc script calls the jre command with the -nojit argument, which is not supported in IBM JDK 1.3. Remove the option by changing line 44 of /usr/IBMdb2/V7.1/bin/db2cc to the following:
JRE_OPTIONS="-ss256k -mx128m -Ddb2path=$DB2PATH" |