Moving Toward Object-Oriented Programming - Beginning Java Programming: The Object-Oriented Approach - page 127

other classes and custom libraries
There are a number of other built‐in classes in Java SE that I do not cover in-depth here. For
instance, there is java.text , which contains a number of classes to provide parsing routines for
text; java.security , which provides encryption services; and classes to work with sound and
images.
Finally, it is also good to keep in mind that Java has a rich ecosystem of third‐party libraries you
can easily incorporate in your own projects whenever you find that the built‐in classes do not suf-
fice. Many of these libraries in fact provide alternatives for some of these built‐in classes, providing
better support to deal with dates and times, for instance, or providing alternatives or extensions for
Java's collection classes. Chapter 12 provides an overview of some of these libraries and shows you
how to include them in your projects.
For now, however, the built‐in classes will guide you through the rest of this topic. You have seen
how to get started with object‐oriented programming in Java. You now know how to define classes,
variables, and methods, and are aware of Java's built‐in classes, most notably of which being Java's
collection types. You still have a lot of ground to cover, however. In some of the examples discussed
in this chapter, I already hinted at the for and if constructs to govern the control flow of your pro-
gram. In the next chapter, this topic will become your focus of attention.