The next chapter covers the object-oriented programming paradigm. Some very simple examples are covered in detail, with great explanations along the way of everything you could imagine. Then we move to a description of keywords and other language features. Finally, a complete Java program is covered for you to try. Chapter four gets more in-depth.
Types are the subject, and the depth is great.
Some C-isms are covered, ie. More compex types are also covered. Operators are next on the agenda, in chapter five. This includes binary operators, arithmetic operators, boolean operators, and so on. Note that in Java there is an enforced distinction between these types, unlike in C. Chapter six is a little longer.