Java 8 Features – 3 Days

Java 8 Features – 3 Days

Prerequisites:

Developers who are having 4-5 years of real project development experience and already using Java 7.

(It Is mandatory to accomplish the training prerequisite conditions before nominating for the session)

Course Outline:

Day 1:

LambdaExpressions

• Why Java 8?
• Behaviour Parameterization

·         More flexible code
·         Anonymous classes
·         What is a lambda?

• Syntax

·         Functional interfaces: where to use lambda expressions?
·         java.util.function
·         Refactoring/putting together exercise
·         Method references: firstclass

• Functions in Java 8
• Method references recipes

·         Type checking
·         Type inference

• Using local variables Streams

·         Collection Processing
·         What is a Stream?
·         Stream operations and patterns
·         Filtering

• Mapping
• Finding and Matching

·         Reducing
·         minBy/maxBy
·         Stream Optimization
·         the reduce pattern
·         Eager vs Lazy

• Short-circuiting and Loop Fusion Defaultandstaticmethodsoninterfaces

·         Motivation for default methods

• Static methods in interface
• Useful default methods

·         Patterns for default methods

• Resolution rules

Day 2:

• Collectors

·         Grouping and partitioning
·         Collection Operations
·         Collecting to lists and sets
·         Flexible Collection

• Arithmetic collectors

·         Max/Min
·         Average/Count/Sum

• Summary statistics
• Advanced Queries

·         Beyond grouping and partitioning

• Downstream collectors Mutable Reduction

·         Extending the reduce pattern

• Reducing collector Easy DataParallelism

·         What is Data Parallelism?
·         Why is this important?

• Parallelizing your streams
• Parallel Gotchas

·         Misuse of reduce
·         Don’t use Locks
·         Danger of mutability

• Decomposing performance
• 
  

Day 3:

Date& TimeinJava8

·         The problem with existing date and time libraries
·         New Classes
·         The core classes: LocalDate/LocalTime

• Creation
• Enums

·         Clock
·         Period and Duration
·         Temporal Adjusters
·         Instant
·         Time Zones
·         Backwards Compatibility

• Common API Patterns Optionaldatatypes
• The problem with null
• How Optional improves upon null

·         How to use Optional in your code
·         Creating Optional objects
·         Default values and actions

• Transforming Optionals with map

·         Chaining Optionals with flatMap

• Rejecting values with filter EnhancedConcurrencywithLambdas

·         Introduction to Concurrency

• Future and ExecutorService
• CompletableFutures FunctionalProgrammingin Java8

·         Functions
·         Immutability

• Concurrency
• Tail-Call Optimization Miscellaneous
• Base64
• Annotations on Java Types
• Repeating Annotations No MorePermanent Generation Conclusion