Beginning Java 8 Language Features: Lambda Expressions, by Kishori Sharan

By Kishori Sharan

Foreword by means of Jeff Friesen.

Beginning Java eight Language beneficial properties covers crucial and complicated good points of the Java programming language equivalent to the recent lambda expressions (closures), internal periods, threads, I/O, Collections, rubbish assortment, streams, and extra. writer Kishori Sharan presents over 60 diagrams and 290 entire courses that can assist you visualize and higher comprehend the subjects lined during this book.

The publication starts off with a chain of chapters at the crucial language beneficial properties supplied via Java, together with annotations, internal sessions, mirrored image, and generics. those issues are then complemented via information of ways to exploit lambda expressions, permitting you to construct strong and effective Java courses. The bankruptcy on threads follows this up and discusses every thing from the very simple recommendations of a thread to the main complex issues similar to synchronizers, the fork/join framework, and atomic variables.

This ebook comprises unrivaled insurance of Java I/O, together with NIO 2.0, the trail API, the FileVisitor API, the watch carrier and asynchronous dossier I/O. With this in-depth wisdom, your information- and file-management courses may be capable of make the most of each characteristic of Java's robust I/O framework.

Finally, you'll the best way to use the move API, a brand new, fascinating addition to Java eight, to accomplish combination operations on collections of knowledge components utilizing functional-style programming. You'll study the main points of movement processing corresponding to developing streams from diversified facts assets, studying the variation among sequential and parallel streams, utilising the filter-map-reduce trend, and working with not obligatory values.

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Additional resources for Beginning Java 8 Language Features: Lambda Expressions, Inner Classes, Threads, I/O, Collections, and Streams

Example text

It is left empty if the new operator is followed by an interface name. If is present, it contains the actual parameter list for a constructor of the existing class to be invoked. The anonymous class body is written as usual inside braces. The above syntax can be broken into two for simplicity: the first syntax is used when the anonymous class implements an interface and the second one is used when it inherits a class. new Interface() { // Anonymous class body goes here } and new Superclass() { // Anonymous class body goes here } Anonymous classes are very powerful.

Println("Version: major=" + major + ", minor=" + minor); } You will use the Version and Deprecated annotation types to annotate your program elements, and access those annotations at runtime. You will also annotate a package declaration and a method declaration. You will use the code for the Version annotation type as listed in Listing 1-18. RUNTIME) annotation, which is needed to read its instances at runtime. Listing 1-18. java file and compile it along with other programs. annotation package.

This section discusses in detail how to develop annotation processors to process annotation at the source code level when you compile Java programs. The University of Washington has developed a Checker Framework that contains a lot of annotations to be used in programs. It also ships with many annotation processors. edu/checker-framework. It contains a tutorial for using different types of processors and a tutorial on how to create your own processor. Java lets you process annotations at runtime as well as at compile time.

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