Java on Gentoo
The simplest way to get started with Java development in Gentoo is to install the Blackdown JDK-1.4.2 along with the Eclipse IDE:
If you want to install the sun’s version of the jdk instead of the blackdown jdk, you can get the 1.4.2 version of it using:
To install the 1.5 version of the jdk, you need to unmask it first. Add the following two lines to your /etc/portage/package.keywords file:
>=dev-java/sun-jdk-1.5.0 ~x86
>=dev-java/java-sdk-docs-1.5.0 ~x86
Now do the emerge:
You can also install both of these versions at the same time, and then make one of them as the default jdk. If you need java support in other applications too(like web browser etc), then make sure to add the relevant keywords in the /etc/portage/package.use file:
=dev-java/sun-jdk-1.4.2.10-r2 X alsa browserplugin doc examples jce mozilla nsplugin
This also installs the documentation and the examples - remove these words if you don’t to install them. Also change the version number if you are installing the 1.5 version of the jdk.
If you want to use Eclipse IDE to create C++ programs, you need the eclipse-cdt plugin. First unmask it by placing the following line in /etc/portage/package.keywords file:
>=dev-util/eclipse-cdt-2.0 ~x86
Now do the emerge:
More information on installing java 1.5 and eclipse 3.x on Gentoo OS.
