Java 8 New Features by Richard Reese -- Read -- Imperial Library of Trantor

Index

Title Page Table of Contents About The Author Code Examples – Read Me Errata Chapter 1 – Java 8 and Interface Enhancements

Introduction to Java 8 Default Methods and Functional Interfaces Creating Default Methods Understanding the Importance of Default Methods Defining a Default Method

Overriding Default Methods

Using Inheritance with Default Methods

Working with Single Inheritance Working with Multiple Inheritance Understanding how Diamond Inheritance Works

Resolving Overridden Default Methods Using Default Methods

Extending Existing Interfaces Using Default Methods to Supplement Adapter Classes Using Default Methods in Core Java Classes Using a Class to Support Default Methods

Understanding the Difference between an Abstract Class and Interfaces Using Static Interface Methods Functional Interfaces

Creating a Functional Interface Using the @FunctionalInterface Annotation Overriding Object Class Methods in a Functional Interface Using Functional Interfaces in the Core Libraries

Conclusion

Chapter 2 – Lambda Expressions

Understanding Lambda Expressions

Inferring the Type of the Target

Creating Lambda Expressions

Lambda Expression Syntax Rules Declaring Parameter Types Mixing Parameter Declarations Omitting Parentheses Eliminating the Block Statement Using Multiple Statements in a Lambda Expression Body Using a Return Value

Writing Succinct Lambda Expressions Capturing Variables in a Lambda Expression Differentiating between a Lambda Expression and a Closure Method and Constructor References

Using Static Method References Using Instance Method References Using Constructor References

Working with Lambda Expressions

Using Lambda Expressions with Variable Declarations Using Lambda Expressions as a Return Value Using Exceptions with a Lambda Expression Using Lambda Expressions with the Tertiary Operator Casting Lambda Expressions Using Lambda Expressions to Initialize an Array Writing Recursive Lambda Expressions

Using the java.util.function Functional Interfaces

Using the Predicate Interface Using the Function Interface Using the BiFunction Interface Using the Consumer Interface Using the Supplier Interface Using Operator Type Interfaces Using the UnaryOperator Interface Using the BinaryOperator Interface

Conclusion

Chapter 3 – Streams

Streams Stream Characteristics

Streams Do Not Store Elements Streams Can Be Unbounded Streams Do Not Modify the Original Source A Stream May Be Ordered Automatic Parallelization

An Overview of Stream Methods Creating a Stream

Using the Stream Interface’s of Method Using the Collection Class’ stream Method Using a Stream.Builder Interface Using the builder method Generating Infinite Streams Using the iterate Method Concatenating Streams Generating an Empty Stream

Using Stream Methods

The Part Example Class Using the forEach Method Using the forEachOrdered Method Using the map Method Using Other Map Methods Using the flatmap Method Using the filter Method Using the Match Type Methods Using the findFirst Method Using the findAny Method Using the Optional Class Using the reduce Method Using the Collector Interface and the collect Method Using the Collects Class Using the iterator Method Using the sorted Method Using the distinct Method Using the limit Method Using the skip Method Using the max, min, and count Methods

Streams for Primitive Types

Using the IntStream Interface

Understanding Lazy and Eager Evaluation

Using Short-Circuit Methods

Using Parallel Stream Operations Conclusion

Chapter 4 – Date and Time

Introduction Why a New API? A Simple Example The ISO-8601 String Format Design Considerations Understanding the Standard Method Names

Understanding the of Type Methods Understanding the from Method Understanding the parse Method Understanding the format Method Understanding the get Type Method Understanding the is Type Methods Understanding the with Type Methods Understanding the plus Type Methods Understanding minus Type Methods Understanding the to Type Methods Understanding the at Type Methods

Overview of the Date and Time Packages Getting the Current Time Working with the Instant Class

Creating an Instant Creating an Instant Based on the Epoch Creating an Instant Based on Parsing a UTC String Creating an Instant by Adding or Subtracting a Time from an Instant Using the Instant Class’ get Type Methods

Working with Time Intervals

Creating Offsets Using the of Type Methods Creating Offsets Using the with Type Methods Creating a Duration Using the parse Method Creating a Duration by Adding or Subtracting a Unit Using the Duration Class

Using the Period Class Using Date and Time Classes Creating Date and Time Classes

Date and Time get Type Methods Adjusting a Date or Time

Using the YearMonth, MonthDay, and Year Classes

Comparing MonthDay Instances

Using the Enumerations DayOfWeek and Month

Using the DayOfWeek Enumeration Using the Month Enumeration

Working with the Time Zone and Offset Classes

Obtaining Available Zone IDs

Working with ZoneOffsets Working with Zone Rules Formatting, Queries, and Value-Based Classes Formatting Dates and Times Using Temporal Queries Understanding Value-Based Classes Conclusion

Chapter 5 – Odds and Ends

Introduction Using the Nashorn JavaScript Engine

Accessing the Nashorn Engine Executing JavaScript Code Executing Java Code from JavaScript Implementing a Java Interface

File IO Enhancements

Using the FileFilter Interface Using the PathMatcher Interface Using the Files Class’ list Method Using the Files Class’ walk Method Using the Path Class’ lines Method

Concurrency Enhancements

Using the Arrays Class’ parallelSort Method Using the Arrays Class’ parallelSetAll Method Using the Arrays Class’ parallelPrefix Method

Collections Enhancements

Using the forEachRemaining Method Using the replace Type Methods Using the compute Type Methods

Project Jigsaw and Compact Profiles

The Compact Profiles Using Compact Profiles

Other Enhancements Javadoc Enhancements Security Enhancements VM Related Enhancements Core Java Enhancements Conclusion

Appendix - Date and Time Classes

Of Type Methods The from Method The parse Method Get Type Methods Is Type Methods With Type Methods Plus Type Methods Minus Type Methods To Type Methods At Type Methods

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