What is the Java environment in Fedora?
OpenJDK 6 is the default Java environment since Fedora 9. It is Oracle(formerly Sun) Java under a free and open source license, and there are runtime and development packages. There is also an alternative Java environment in Fedora that has three components: the GNU Java runtime (“libgcj”), the Eclipse Java compiler (“ecj”), and a set of wrappers and links (“java-gcj-compat”) that present the runtime and compiler to the user in the same way as other Java environments are presented.