Chapter 2: Everything is an object

This chapter moves you to the point where you can write your first Java program,
so it must give an overview of the essentials, including the concept of a “handle” to
an object; how to create an object; an introduction to primitive types and arrays;
scoping and the way objects are destroyed by the garbage collector; how everything
in Java is a new data type (class) and how to create your own classes; functions,
arguments, and return values; name visibility and using components from other
libraries; the static keyword; comments and embedded documentation.