Various objectives (e.g. 1.1 and 1.6) refer to "nested classes". I believe there's a slight technical difference between nested classes and inner classes, but in common parlance they're just about the same thing, and you need to know about them for the exam.
Consultant to SCJP team.<br />Co-designer of SCJD exam.<br />Co-author of "Complete Java 2 Certification Study Guide".<br />Author of "Ground-Up Java".
According to Sun's definitions, nested classes are a superset of inner classes. Nested classes include static member classes and inner classes. Inner classes include nonstatic member classes, local classes, and anonymous classes. So "nested classes" includes all these.