Before embarking on the road to Java programmer certification, it is important to understand the basic terminology and concepts in object-oriented programming (OOP). In this chapter, the emphasis is on providing an introduction rather than an exhaustive coverage. In-depth coverage of the concepts follows in due course in subsequent chapters of the book.
Java supports the writing of many different kinds of executables: applications, applets, and servlets. The basic elements of a Java application are introduced in this chapter. The old adage that practice makes perfect is certainly true when learning a programming language. To encourage programming on the computer, the mechanics of compiling and running a Java application are outlined.