“A problem well stated is a problem half solved.”—Charles Kettering, inventor and engineerTo build on this concept, I must say that thinking about all possible scenarios and coming out with a best possible option is the key to a robust and lasting solution. This new second edition of Java Design Patterns will serve as a mentor and guide to engineers and designers who are regularly challenged to come up with the best possible solution in resource-constrained environments. This book explains in very clear terms the design patterns, the alternatives, and the concept of antipatterns. The complete section on antipatterns is very thought-provoking and helps us appreciate the utility of design in the first place.As in his previous books, Vaskaran has provided hands-on experience in implementing design patterns. His innate way of getting engineers to think of an alternative solution is very insightful. This book will serve as mentor and task master as one traverses the chapters.When I reflect on my interactions with Vaskaran while facing some complex engineering issues in HPI, I find him to be a keen listener, deep thinker, and a person who doesn’t rush for a solution. After analyzing all possible alternatives, he picks the best one among the lot. In summary, this is what this book all about.