This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
The jdk means a set of software for creating programs with. J2EE means Enterprise Edition which is an extension of the normal API to permit construction of large commercial applications. That is very much simplified.