We will deal with some essential Java classes that contain ways to work with files, groups of elements, and Java errors in this chapter. An exercise formulated to help you gain a practical understanding of the classes covered in the chapter will serve as a learning tool.

In This Chapter:

Classes - Exercize

How classes interact with each other

Input/Output in Java

A Java stream representing a sequence of data of a specific type

Collections

A structure that represents a group of data or objects

Exceptions

Information about the type of error and the statement that caused the error