Sun Microsystems estimates the size of the Java developer market to be 2.5 million and rising). As commercial businesses move over from client server systems to developing multi-tiered web-based systems, this audience will continue to grow. This book is unique in that it covers a lot of ground in a small number of pages, using examples and focused instruction to teach concepts. It is aimed at the reader who has experience programming in another language and is interested in switching to Java. This is also a perfect supplement for courses in a wide range within the CS curriculum and a number of instructors surveyed have expressed enthusiasm for this particular book so that they can get all of their students up-to-speed quickly on Java.