Java 7 and Java 8 introduced new features and functions including, for Each() method in Iterable interface, default and static methods in Interfaces, Functional Interfaces and Lambda Expressions, Java Stream API for Bulk Data Operations on Collections, Java Time API, Collection API improvements,

Concurrency API improvements, and Java IO improvements. In this new edition of Effective Java, Bloch explores new design patterns and language idioms that have been introduced since the second edition was released in 2008 shortly after Java SE6, including Lambda, streams, generics and collections, as well as selected Java 9 features.

As in previous editions, each chapter consists of several "items" presented in the form of a short, standalone essay that provides specific advice, insight into Java platform subtleties, and updated code examples.

The comprehensive descriptions and explanations for each item illuminate what to do, what not to do, and why.

Updated techniques and best practices on classic topics, including objects, classes, libraries, methods, and serialization

How to avoid the traps and pitfalls of commonly misunderstood subtleties of the language

Focus on the language and its most fundamental libraries: java.lang, java.util, and, to a lesser extent, java.util.concurrent and java.io