Unfortunately the GNU java in CentOS 5 is too old to run modern Java code. So, you need to install the Sun version in many cases, and the jpackage method is typically the best way to do that. Two problems, though:
* They don’t have an RPM that represents the current Sun version
* Their version doesn’t work well on CentOS due to CentOS RPM bugs
If you don’t have them already installed, you need the RPM development tools. Something like:
yum -y install rpm-build rpmdevtools
should be sufficient. (note: I’m assuming you’re root. Most of this can also be done with a local RPM build tree and sudo, but is beyond the scope of this article).
As of this writing the current security release of the Java JDK is 1.6u7, which you can get here. Pick 32-bit linux (the only type I tested) get the linux non-RPM version, and put the downloaded ‘.bin’ file in /usr/src/redhat/SOURCES.
Now, download my updated spec file and put it in /usr/src/redhat/SPEC. If you’re on a Fedora platform or CentOS fixes their version of rpm you might want this non-CentOS spec instead. This latter one builds everything just fine on CentOS but there are UnixODBC link errors due to the rpm bug.
Now, build Java with:
cd /usr/src/redhat
rpmbuild -ba SPEC/java-1.6.0-sun-centos-5.spec
This will take a while. You should wind up with a bunch of RPM files in RPMS/i586/, like this:
-rw-r--r-- 1 root root 43085836 Aug 11 22:48 java-1.6.0-sun-1.6.0.7-1jpp.i586.rpm
-rw-r--r-- 1 root root 35903 Aug 11 22:48 java-1.6.0-sun-alsa-1.6.0.7-1jpp.i586.rpm
-rw-r--r-- 1 root root 10473773 Aug 11 22:48 java-1.6.0-sun-demo-1.6.0.7-1jpp.i586.rpm
-rw-r--r-- 1 root root 21709383 Aug 11 22:48 java-1.6.0-sun-devel-1.6.0.7-1jpp.i586.rpm
-rw-r--r-- 1 root root 1259794 Aug 11 22:48 java-1.6.0-sun-fonts-1.6.0.7-1jpp.i586.rpm
-rw-r--r-- 1 root root 26057 Aug 11 22:48 java-1.6.0-sun-jdbc-1.6.0.7-1jpp.i586.rpm
-rw-r--r-- 1 root root 807126 Aug 11 22:48 java-1.6.0-sun-plugin-1.6.0.7-1jpp.i586.rpm
-rw-r--r-- 1 root root 17692845 Aug 11 22:48 java-1.6.0-sun-src-1.6.0.7-1jpp.i586.rpm
Use yum to install them like this:
cd RPMS/i586
yum --nogpgcheck localinstall java-1.6.0-sun-*.rpm
It should find dependencies, something like this:
Dependencies Resolved
=============================================================================
Package Arch Version Repository Size
=============================================================================
Installing:
java-1.6.0-sun-alsa i586 1.6.0.7-1jpp java-1.6.0-sun-alsa-1.6.0.7-1jpp.i586.rpm 79 k
java-1.6.0-sun-demo i586 1.6.0.7-1jpp java-1.6.0-sun-demo-1.6.0.7-1jpp.i586.rpm 15 M
java-1.6.0-sun-devel i586 1.6.0.7-1jpp java-1.6.0-sun-devel-1.6.0.7-1jpp.i586.rpm 36 M
java-1.6.0-sun-fonts i586 1.6.0.7-1jpp java-1.6.0-sun-fonts-1.6.0.7-1jpp.i586.rpm 2.0 M
java-1.6.0-sun-jdbc i586 1.6.0.7-1jpp java-1.6.0-sun-jdbc-1.6.0.7-1jpp.i586.rpm 69 k
java-1.6.0-sun-plugin i586 1.6.0.7-1jpp java-1.6.0-sun-plugin-1.6.0.7-1jpp.i586.rpm 1.6 M
java-1.6.0-sun-src i586 1.6.0.7-1jpp java-1.6.0-sun-src-1.6.0.7-1jpp.i586.rpm 18 M
Installing for dependencies:
java-1.6.0-sun i586 1.6.0.7-1jpp java-1.6.0-sun-1.6.0.7-1jpp.i586.rpm 68 M
libXp i386 1.0.0-8.1.el5 base 23 k
unixODBC-devel i386 2.2.11-7.1 base 739 k
unixODBC i386 2.2.11-7.1 base 832 k
And yum should download and complete without errors.
Now, make sure that this new version of Java is set to be the default with:
/usr/sbin/alternatives --config java
and enjoy current java. Hopefully it won’t be long before Sun gets its code freed so next time you can just ‘yum -y install sun-java’.