Java 8 in Action
ISBN: 9789351197430
424 pages
For more information write to us at: acadmktg@wiley.com
Description
Every new version of Java is important, but Java 8 is a game changer. Java 8 in Action is a clearly written guide to the new features of Java 8. It begins with a practical introduction to lambdas, using real-world Java code. Next, it covers the new Streams API and shows how you can use it to make collection-based code radically easier to understand and maintain. It also explains other major Java 8 features including default methods, Optional, CompletableFuture and the new Date and Time API.
Part 1 Fundamentals
Chapter 1 Java 8: why should you care?
· Why is Java still changing?
· Functions in Java
· Streams
· Default methods
· Other good ideas from functional programming
Chapter 2 Passing code with behavior parameterization
· Coping with changing requirements
· Behavior parameterization
· Tackling verbosity
· Real-world examples
Chapter 3 Lambda expressions
· Lambdas in a nutshell
· Where and how to use lambdas
· Putting lambdas into practice: the execute around pattern
· Using functional interfaces
· Type checking, type inference and restrictions
· Method references
· Putting lambdas and method references into practice!
· Useful methods to compose lambda expressions
· Similar ideas from mathematics
Part 2 Functional-style data processing
Chapter 4 Introducing streams
· What are streams?
· Getting started with streams
· Streams vs. collections
· Stream operations
Chapter 5 Working with streams
· Filtering and slicing
· Mapping
· Finding and matching
· Reducing
· Putting it all into practice
· Numeric streams
· Building streams
Chapter 6 Collecting data with streams
· Collectors in a nutshell
· Reducing and summarizing
· Grouping
· Partitioning
· The Collector interface
· Developing your own collector for better performance
Chapter 7 Parallel data processing and performance
· Parallel streams
· The fork/join framework
· Spliterator
Part 3 Effective Java 8 programming
Chapter 8 Refactoring, testing and debugging
· Refactoring for improved readability and flexibility
· Refactoring object-oriented design patterns with lambdas
· Testing lambdas
· Debugging
Chapter 9 Default methods
· Evolving APIs
· Default methods in a nutshell
· Usage patterns for default methods
· Resolution rules
Chapter 10 Using Optional as a better alternative to null
· How do you model the absence of a value?
· Introducing the Optional class
· Patterns for adopting Optional
· Practical examples of using Optional
Chapter 11 CompletableFuture: composable asynchronous programming
· Futures
· Implementing an asynchronous API
· Make your code non-blocking
· Pipelining asynchronous tasks
· Reacting to a CompletableFuture completion
Chapter 12 New Date and Time API
· LocalDate, LocalTime, Instant, Duration and Period
· Manipulating, parsing and formatting dates
· Working with different time zones and calendars
Part 4 Beyond Java
Chapter 13 Thinking functionally
· Implementing and maintaining systems
· What’s functional programming?
· Recursion vs. iteration
Chapter 14 Functional programming techniques
· Functions everywhere
· Persistent data structures
· Lazy evaluation with streams
· Pattern matching
· Miscellany
Chapter 15 Blending OOP and FP: comparing Java 8 and Scala
· Introduction to Scala
· Functions
· Classes and traits
Chapter 16 Conclusions and where next for Java
· Review of Java 8 features
· What’s ahead for Java?