In this work, the author introduces the basics of objects as Java uses them. He then goes through the fundamental concepts underlying all Java programming, including program flow, initialization and clean-up, hiding implementations, reusing classes and polymorphism. Using examples, he introcuces error-handling, exceptions, Java I/O, run-time type identification, and passing and returing objects. He covers the Java AWT, multithreading, and network programming with Java.