awesome-java8

A library for writing HTTP microservices that focuses on composability and simplicity, with high performance using modern Java idioms and features. :8ball:

While this is "experimental", it's worth looking at if you're coming to microservices from a "slimmed down" Java EE point of view and need something to handle service discovery. This was shown in a JavaOne 2015 conference talk

Fluent assertions for Java unit testing, with the 3.0 release requiring Java 8. :8ball:

BDD-oriented framework that leverages lambdas to make tests more "behavioral". If you've seen Jasmine or Spock, this will be familiar. :8ball:

The Java 8-specific version of the wonderful mocking library, Mockito. Works great with

Event-driven framework for coordinating fault-tolerant distributed systems built on the Raft consensus algorithm. :8ball:

A "minimally opinionated" web framework that leverages Google's Guice dependency-injection library to include modules such as JOOQ, Curator, Jersey, Kafka, Metrics, and more. :8ball:

Writes builder-pattern builders for your code. Very well documented and supports all major IDEs and build tools. Supports Java 8

One of the earlier Java 8 books, but has lots of good diagrams and pictures to help one learn about things like internal vs. external iteration in streams.

Written by the author of the Lambda Behave testing framework, clearly Richard Warburton knows his lambdas. Concise, yet covers testing & debugging, design, and concurrency.

Cay S. Horstmann has been writing Java books forever. This book is right on target and includes even some of the "minor" new features in Java 8, such as using a lambda to do "compare-and-set" operations on atomic variables.

A modular web framework that supports multiple servers (Netty, Jetty, and Undertow), Websockets, etc., and can be used in many different ways by including a wide variety of modules, e.g., provide a full MVC web site, or just provide APIs. :8ball:

High performance Java 8-based in-memory caching library providing a near optimal "hit rate". Well-documented and flexible. :8ball:

Very modular, so only include what you need. From function exception handling (

A library that focuses on users needing async and lazy streams (formerly Simple React). Very well documented with lots of diagrams (yay!). :8ball:

A second-generation Reactive library for building non-blocking applications on the JVM based on the Reactive Streams Specification. It directly interacts with the Java 8 functional API, Completable Future, Stream and Duration. :8ball:

Code generator for user-defined algebraic data types (aka sum types) based on an enhanced "visitor" pattern. Provides structural pattern matching, laziness, functional setters (return a copy of an object with one field modified) & more. :8ball:

Part of the jOOQ series of libraries, provides more Functions, Tuples, and

Allows checked exceptions in functional interfaces and converts exceptions to Optional return. :8ball:

Offers about a dozen utilities for

Adds the notion of Tuples, along with immutable Values and Pattern Matching, to make it easier to write more functional Java code. (Formerly known as Javaslang.) :8ball: