Everything else in the course assumes Unit 1. Variables, types, expressions, calling methods on objects, and the String class. Weakness here shows up as lost points in every other unit.
What the College Board expects you to walk away understanding
Java programs are sequences of statements that a compiler translates; errors can happen at compile time or run time.
Variables have types; primitive types hold values directly while reference types hold addresses of objects.
Methods are called on classes (static) or objects (instance), take arguments, and may return values.
String and Math are the two classes you must know in detail, using exactly the methods on the Java Quick Reference.
Topics in this Unit
Night-before review
Every key term and exam tip from this unit on one printable page.