Considero que este libro es de imprescindible lectura para adentrarse en las novedades de Java 8. El libro comienza ofreciendo una visión muy general sobre las novedades, para luego ir desgranando una a una y entrar en un nivel de detalle muy preciso. Muy recomendado.
I am an enthusiastic Java programmer and I needed a kick-start with Java 8. Although I will not be migrating from Java 7 in the short term, I must be prepared for the upcoming changes! As always, the Manning “… In Action” books are the best place to start and (not really surprising) this “Java 8 in Action” book is no exception.
I fully agree with the authors that Java 8 contains the most important updates to the language ever. Although the book explains complex matter, the authors were able to deliver a book in clear and understandable writing. In my opinion they were able to provide the needed theoretical background without boring the reader to death.
The new language concepts are explained in depth and supported by simple but powerful examples. Chapter 8 is very helpful for developers who need to re-engineer their existing software and/or improve maintainability.
What I miss in the introduction is an emphasis one of the best features of the Java language: backward compatibility. Although the language updates are impressive, version compatibility is preserved; an important feature for any serious enterprise level software developer.
Chapter 15 is the only chapter, which I consider redundant and completely out-of-place. I really don’t understand why the authors need to add a chapter on Scala! Due to its over-optimistic and non-objective approach it even seems that migrating to Java 8 would be a mistake. In a book about Java 8 I don’t want to read how much better another language is. If I want that information I would buy another book! Unfortunately this spoiled my positive opinion about the book. Only for this reason I gave 4 instead of 5 stars!
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