>Java is free like in libre, the reference implementation is under the GPLv2: OpenJDK
Java is NOT free as in Libre. While OpenJDK is the "reference implementation" (which in Oracles terminology means "Blame the Apache Foundation") it does not and will never include the closed source goodies in Oracle Java.
In addition, Linux distros are no longer allowed to redistribute Oracle Java due to some bizarre Ellinsionian fiat. (probably they want you to use Snoracle Linux). So If you still need Oracle Java for whatever reason, you have to install it yourself. However despite Larry's best efforts, the Community (thanks!) has come through with scripts and native packages to install recent Oracle Java on any Linux distro you can think of.