Java closures and lambda

At a Glance; Introduction; Chapter 1: Java 8: It's a Whole New Java; Java 8 Returns Java to the Forefront; Java Has Had Functional Programming All Along; Java 8 Is Not Just Syntactic Sugar; Is Java 8 a Functional Programming Language?; Enough with the Theory; onto the Implementation!; Chapter 2: Understanding Lambdas in Java 8; Java 8's Lambda Syntax; Lambdas as Closures; No-Argument and Multi-Argument Lambdas; Partial Function Application and Mr. Curry's Verb; Mr. Curry's Verb and Functional Shape; Lambdas with No Return Value; Lambdas with Complex Bodies

Lambdas with Explicit TypingLambdas as Operators; Lambdas as Predicates; Lambdas with Primitive Arguments; Making Methods into Lambdas; Making Static Methods into Lambdas; Making Constructors into Lambdas; Making Instance Methods into Lambdas; Specifying a Method to Be Used Later; Lambdas as Interface Implementations; Def ault Methods; Static Methods; Functional Interface Helper Methods; Function.identity() and UnaryOperator.identity(); Function.compose and Function.andThen; Consumer.andThen; Predicate.and and Predicate.or; Predicate.isEqual; Predicate.negate

BinaryOperator. minBy and BinaryOperator. maxByLambda Best Practices; Use Interfaces; Use Method References; Define Lambdas Inline; Lambdas Should Always Be Threadsafe; Don't Use Null; Don't R elease Zalgo; Build Complexity from Simple Parts; Use Types and the Compiler to Your Advantage; Chapter 3: Lambda's Domain: Collections, Maps, and Streams; Lambdas and Functional Programming; Functional Iteration; Manipulating Collections and Maps with Lambdas; Filtering Collections and Maps; Mapping Collections and Maps; Map Computations; Streams; Stream Creation; Mapping and Filtering Streams

Collecting, Processing, or Reducing StreamsPrimitive Streams; Lambda's Domain in Review; Chapter 4: I/O with Lambdas; Temporary Files and the Hole in the Middle; Exception Handling via Input: Passing in an Exception Handler; Exception Handling via Output: Capturing Execution Results; Consuming Our Temp File Function; Reading All the Lines of Files in a Directory; Complex Stream Processing Using Creative Flattening; Streaming all the Lines of all the Files in a Directory; Summary; Chapter 5: Data Access with Lambdas; Representing the Intermediary Query Results; Printing Out the Results

Mapping the ResultSet to a StreamMethod One: Building a Stream Using the Stream Builder; Method Two: Building a Stream Using Stream.of and Stream.flatMap; Mapping the ResultSet with Result-Based Error Handling; Method Three: Building a Stream Using an AbstractSpliterator; Method Four: Building a Stream from an Iterator; Pulling It All Together; Chapter 6: Lambda Concurrency; Lambdas and Classic Java Threading; Lambdas and Executors; Lambdas and the ThreadPoolExecutor; Lambdas and Fork/Join; Stream Parallelism; Conclusion; Chapter 7: Lambdas and Legacy Code; Resources and Exceptions