Java is a widely-used programming language, particularly in the context of AP Computer Science classes, where it serves as an introduction to object-oriented programming (OOP). It closely resembles C in syntax but is more akin to C++ in its structure, aiming to simplify some of the complexities found in C++. Java's primary advantage is its portability; it compiles code into platform-independent bytecode, allowing applications to run on any system with the appropriate Java runtime environment. Historically, Java gained traction with the rise of the Internet, initially through Java Applets and now primarily through server-side applications like Servlets and JavaServer Pages. While it excels in graphical user interface (GUI) development, its relevance has shifted towards supporting middle-tier Internet applications. The language is backed by significant industry demand, making it a practical choice for learning programming concepts and OOP fundamentals.