Installing › Preinstallation › System Requirements › Supplying Your Own JVM

Supplying Your Own JVM

The generic UNIX installer does not include a JRE. If you are using the generic UNIX installer, you must supply your own JVM.

Optionally, you can use this procedure with an installer for another platform to override the included JRE. See Using DevTest Workstation with Your Java Environment.

Note: DevTest supports IBM JRE Version 7, Release 1. DevTest does not support IBM JRE Version 8, Oracle JRE 1.8, or OpenJDK.

Follow these steps:

1. Download the Java SE Development Kit (JDK) 7 package for your platform from the Oracle website.
2. Download the Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files 7 from the Oracle website.
3. Install JDK 7 for your operating system on the computer where you plan to install DevTest. If there is no java directory, create one (mkdir java).

   For example, install JDK 7 in \usr\java, which creates the \usr\java\jdk1.7.0_67 directory (JDK_HOME).

4. After you copy the jdk-7u67-platform. tar.gz file, enter this command:

   tar zxvf jdk-7u67-platform-x64.tar.gz
   

5. Set environment variables:
   • Set the JDK_HOME environment variable to the directory where you installed JDK 7.
   • Set the JAVA_HOME environment variable to point to the JDK_HOME directory.

   For example:

   cd \usr\java\jdk1.7.0_67
   pwd
   export JAVA_HOME=$PWD
   export JDK_HOME=$PWD
   

6. Extract the UnlimitedJCEPolicy folder from the UnlimitedJCEPolicyJDK7.zip file. Move the following JAR files from this folder to the JDK_HOME\jre\lib\security directory:
   • local_policy.jar
   • US_export_policy.jar

   This action replaces the existing JAR files with the same names.

7. Copy the tools.jar file from the JDK_HOME\lib directory to the JDK_HOME\jre\lib\ext directory.

   cd $JDK_HOME\jre\lib\ext
   cp $JDK_HOME\lib\tools.jar .
   

8. If you are overriding the included JRE, perform the following steps after you install DevTest:
   1. Set the LISA_JAVA_HOME environment variable. For example:

      cd \usr\java\jdk1.7.0_67
      pwd
      export LISA_JAVA_HOME=$PWD
      

   2. Rename the jre directory under the DevTest installation directory to jre_default as described in Using DevTest Workstation with Your Java Environment.