Page Comparison

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Installation of the Sun JDK is as easy as:
[see also explained at http://www.jpackage.org/installation.php\]

check the current java(c) version:

$ java -version

[probably the GNU one]

...

[probably the Eclipse Java Compiler]

Install the Sun JDK 

1. get the latest Sun JDK RPM:
   Go to the directory where you want to download, extract and install (eg: cd /tmp, cd /root).

   No Format
   $ links http://java.sun.com/javase/downloads/index.jsp

   Choose the link to the latest JDK.
   On the download page: accept the agreement in links and download the JDK RPM-in-bin for linux.
2. Make the downloaded binary executable and run it:

   No Format
   $ chmod u+x jdk-<version>-linux-i586-rpm.bin $ ./jdk-<version>-linux-i586-rpm.bin

   The rpm is extracted from the bin and installed (accept the license).
   The java version is now installed in /usr/java/. This dir contains all individual versions and two symlinks: "latest" and "default". You should never reference to any of these locations (see 4).
3. Get the matching JPackage compatibility package for this Sun JDK:

   No Format
   $ links ftp://jpackage.hmdc.harvard.edu/JPackage/1.7/generic/RPMS.non-free/ $ rpm -ivh java-x.x.x-sun-compat-x.x.x.xx-1jpp.i586.rpm

4. To make the Sun JDK the default for the entire system, use the 'alternatives' method:. This will create symlinks in /etc/alternatives/ that are used throughout the entire system (eg see "$ ll /usr/bin/java").
   [select the Sun version instead of the GNU version for each of these commands]

   No Format
   $ /usr/sbin/alternatives --config java $ /usr/sbin/alternatives --config javac

check

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the new installation

$ java -version

[should be the new Sun version]

$ javac -version

[should be the new Sun version]

Tomcat restart (optional)

Make Tomcat use this JDK now by restarting it:

$ /etc/init.d/tomcat5 restart