Java SE 7 Packages
Because Java is a programming language, the OCA exam focuses on many of the packages and classes within the core Java SE distributions. Java EE coverage was included in the prior SCJA exam but has been removed for the OCA. The tables provided in this appendix detail the full set of Java SE 7 packages.
You don’t need to learn the low-level details of Java packages to perform well on the OCA exam. To a large extent, just knowing what the packages are designed for and what type of functionality they contain will help you achieve a high score.
Java SE 7 provides packages in the following areas:
Core packages Language, utility, ...