Java 8 was the largest update to Java in it's history. Java 9 and beyond has brought us Reactive and Asynchronous programming. This isn't your parents' Java anymore. Modern Java, has incorporated the best ideas from functional programming to help us write better, easier to read, more flexible code that scales to multicore. Join this hands-on Modern Java course and learn to write more flexible and concise code, using the latest practices and tools and cutting edge programming approaches.
Learn how to:
- Get up to speed with lambda expressions.
- Apply functional programming concepts and understand where this is an appropriate approach and where its not.
- Introduce changes to the collections library such as Streams and the higher order functions such as map and filter.
- Solve simple data processing problems with Collectors.
What the community says
"Very knowledgeable and an engaging delivery style. Excellent exercises to complement the learning, well spread out to give a good balance between lecture/practical."Michael Funnell, Betfair
"Honestly the best course I've ever attended. Perfect balance of lectures and exercises."Aaron Graham, Unruly Group
"Entertaining and engaging presentation style, well prepared code demonstrations."Boris Morris, Anaplan
"Best Development course I've been on in 10 years! I will get the rest of my team to attend this course."James Callaghan
"Thanks again for a providing such a great workshop."Attendee
- Why Java 8?
- Behaviour parameterisation
- More flexible code
- Anonymous classes
- What is a lambda?
- Functional interfaces: where to use lambda expressions?
- Refactoring/putting together exercise
- Method references: firstclass
- Functions in Java 8
- Method references recipes
- Type checking
- Type inference
- Using local variables
- Collection Processing
- What is a Stream?
- Stream operations and patterns
- Finding and Matching
- Stream Optimization
- The reduce pattern
- Eager vs Lazy
- Shortcircuiting and Loop Fusion
Exercise: financial data processing (part 1)
- Grouping and partitioning
- Collection Operations
- Collecting to lists and sets
- Flexible Collection
- Arithmetic collectors
- Summary statistics
- Advanced Queries
- Beyond grouping and partitioning
- Downstream collectors
Exercise: financial data processing (part 2)
- Extending the reduce pattern
- Reducing collector
Easy Data Parallelism
- What is Data Parallelism?
- Why is this important?
- Parallelising your streams
- Parallel Gotchas
- Misuse of reduce
- Don’t use Locks
- Danger of mutability
- Decomposing performance
Testing & Debugging Lambda Expressions
- Unit testing lambda expressions
- Debugging with laziness
- Stack traces
Practical: Hands on Debugging
Default and static methods on interfaces
- Motivation for default methods
- Static methods in interface
- Useful default methods
- Patterns for default methods
- Resolution rules
Enhanced Design with Lambdas
- Execute around: resource handling
- Deferred execution: Logging
- Design patterns
- Processing pipeline
Date & Time in Java 8
- The problem with existing date and time libraries
- The core classes: LocalDate/LocalTime
- Common API Patterns
Optional data types
- 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
Enhanced Concurrency with Lambdas
- Introduction to Concurrency
- Future and ExecutorService
Asynchronous vs Synchronous Programming
Asynchronous Servlets (3.0)
Why use asynchronous communications?
- Fault Tolerance
Approaches to Concurrency
The Reactive Manifesto and Functional Reactive Programming
Models of Concurrency
- Event Based
- The Actor Model
- Reactive Streams
Promises using Completable Futures
Alternative Promise Implementations
The Actor Model with Akka
What are Actors?
Alternative Actor Implementations
Reactive Streams with RxJava
Introducing Reactive Streams
Pull vs. push models
Java 9 Flow API
Alternative Reactive Stream Implementations
If you are an experienced Java or OO developer, keen to learn to write more flexible and concise code using the latest Java language features and modern approaches like Reactive and Asynchronous programming, this Java course is for you!
To get the most from this Modern Java course, you should have existing Java or OO programming experience in a commercial environment.
Bring your own hardware
You are required to bring your own laptop for this course, so you learn how to develop within your own environment. A full installation guide for the course software will be provided with your joining instructions.