This self-explanatory and highly informative text presents an exhaustive coverage of the concepts of Object-Oriented Programming with JAVA. A number of good illustrative examples are provided for each concept supported by well-crafted programs, thus making it useful for even those having no prerequisite knowledge of programming. Beginning from the preliminaries of the language and the basic principles of OOP, this textbook moves gradually towards advanced concepts like exception handling, multithreaded programming, GUI support through AWT controls, string handling, file handling, basic utility classes and collection framework in Java. In addition, the well-planned material in the book acts as a precursor to move towards high-end programming in Java, which includes the discussion of Servlets, Java Server Pages, JDBC, Swings, etc.