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title = "Modern Java in Action - Raoul-Gabriel Urma"
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date = 2019-02-08
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[taxonomies]
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tags = ["books", "reviews", "java", "java 8", "java 9", "raoul-gabriel urma", "it"]
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+++
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[GoodReads Summary](https://www.goodreads.com/book/show/46213396-modern-java-in-action):
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Java 8 Lambdas in Action is a clearly-written guide to Java 8 lambdas and
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functional programming in Java. It begins with a practical introduction to the
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structure and benefits of lambda expressions in real-world Java code. The book
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then introduces the Stream API and shows how it can make collections-related
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code radically easier to understand and maintain. Along the way, you'll
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discover new FP-oriented design patterns with Java 8 for code reuse, code
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readability, exception handling, data manipulation, and concurrency. For
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developers also exploring other functional languages on the JVM, the book
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concludes with a quick survey of useful functional features in Scala and
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Clojure.
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<!-- more -->
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{{ stars(stars=2) }}
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To be short: It's a good book, but it is extremely (and unnecessary) verbose.
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It covers the new stuff on Java 8 (like streams and lambdas) and some of Java 9
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(like the Flow/reactive interface). It does a good job on Streams and Lambdas,
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but seems to fall a bit short on the reactive interface, maybe 'cause it's just
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an interface, although I found the examples a little bit missing in some
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points, like showing the Three interfaces, Subscriber, Subscription and
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Publisher, but showing examples without the Publisher. A bit worse (IMHO), is
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that, in order to produce an example, instead of publishing some data, it shows
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a generic publisher of sequential numbers, in which it calls the real
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publisher.
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Also, the authors seem a bit too enthusiastic about lambdas. Even when the code
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becomes less readable -- specially in the Flow examples -- they still use
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lambdas. They are so into it that the example of a `for` being converted to a
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stream is shown at least 4 times.
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There are too many "as follows"; there are too many "in the next section" just
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before the next section; there is too much repetition that shouldn't be there.
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Again, the content is good, but the text is terrible.
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