A.2. Configure the Default Java Development Kit on Red Hat Enterprise Linux

Procedure A.2. Configure the Default Java Development Kit

1. Determine the paths for your preferred java and javac binaries.

   You can use the command rpm -ql packagename |grep bin to find the locations of binaries installed from RPMs. The default locations of the java and javac binaries on Red Hat Enterprise Linux 32-bit systems are as follows.

   Table A.1. Default locations for java and javac binaries

   Java Development Kit	Path
   OpenJDK 1.6	/usr/lib/jvm/jre-1.6.0-openjdk/bin/java /usr/lib/jvm/java-1.6.0-openjdk/bin/javac
   Oracle JDK 1.6	/usr/lib/jvm/jre-1.6.0-sun/bin/java /usr/lib/jvm/java-1.6.0-sun/bin/javac

2. Set the alternative you wish to use for each.

   Run the following commands to set your system to use a specific java and javac: /usr/sbin/alternatives --config java or /usr/sbin/alternatives --config javac. Follow the on-screen instructions.

3. Optional: Set the java_sdk_1.6.0 alternative choice.

   If you want to use Oracle JDK, you need to set the alternative for java_sdk_1.6.0. as well. Use the following command: /usr/sbin/alternatives --config java_sdk_1.6.0. The correct path is usually /usr/lib/jvm/java-1.6.0-sun. You can do a file listing to verify it.