Java Modules and New Features (Java 11+)

 

Proficient Java programmers who need to learn the important new features through Java 11 LTS.
 

Working knowledge of Java programming, including use of inheritance, interfaces, and exceptions
 

Java Modules and New Features (Java 11+)

• Agenda
• Conventions

Preface: Java State of the Union

• Java Release Cycle
• and Support - Illustrated
• Update Schedule - By Example
• Modules and JDK Version Numbers
• In
• In
• Out
• Out
• Out
• - for Removal
• to Move to Java Modules?
• in Java 9+
• 0.0: Getting Started

Session 1: Introduction to Modules

• Objectives

Motivation and Overview

• before Java Modules
• Natural Progression of Organization
• Encapsulation
• Encapsulation - Not in Java 8
• Use Only - Case Study
• Model vs. Runtime Model
• Model vs. Runtime Model
• Hell
• of the Module Paradigm
• Graphs
• Java Modules
• Encapsulation - Realized in Java 9
• Name vs. Package Name
• and Director Structure
• Projects and the Module Path
• Can Be Controversial
• 1.1: First Module Project

Types of Modules

• of Modules - Defined
• Modules
• Modules
• Modules
• Modules - Why?
• Module
• Module - Why?

Modular JDK

• KDL - Different, Yet Compatible
• SE vs. JDK - Not the Same!
• Modules - java.base and java.se
• of the Modular JDK

Our Approach

• Work
• Study
• 1.2: Simple Migration

Session 2: Working With Modules

• Objectives

Defining and Using Modules

• Applications
• 2.1: Modular Application
• Graphs
• Module and Module Graph
• Graph in a Real library - Derby JDBC
• Graph in the Java Platform - java.se
• Dependencies
• Modules
• Exports
• up Deep Reflection
• Encapsulation - Summary

Services

• Overview
• - UML Diagram
• before Modules
• with Modules
• Class - Example
• Interface - Example
• Provider - Example
• - Example
• 2.2: Services

Compatibility and Migration

• / Gradual Adoption
• with Private (Deep) Reflection
• Issues
• and Unnamed Modules - Revisited
• Migration Path
• Migration Path - Illustrated
• Packages
• I Just Ditch the Classpath?
• Line Directives
• 2.3: Migration

Conclusion

• - It's Not Conclusive!
• Support
• Tools and Dependencies
• about Module Versions?
• Support
• and Testing
• Java EE
• Module or Not to Module?
• Module or Not to Module?
• is slow - Mid 2019 Stats
• Resources
• 2.4: Multi-Module Maven Project [Optional]

Session 3: Type Inference

• Objectives

Local-Variable Type Inference

• Comes to Java
• var in for-each Loops
• Continuation of Type Inference in Java
• Local-Variable Type Inference

Overview of Lambda Expressions

• Interface - Defined
• a Method Down to is Essence
• Expression as Functional Interface
• Interfaces and Lambdas
• Occur in a Target Context
• in JUnit - Executable
• in Collections - Consumer<T>
• Expression Syntax - Overview
• Compatibility
• Expression Syntax - Details
• Expression Syntax - Details

Local-Variable Syntax for Lambdas

• Syntax for Lambdas
• var with Lambdas
• 3.1: Using var [Optional]

Session 4: JShell

• Objectives

Introduction to JShell

• Comes to Java
• Operations and Commands
• Learning
• Started with JShell

Working with Code

• Points
• Snippets
• Work with Snippets - Date/Time API
• the Stream API On-the-Fly
• Commands
• Methods
• Code
• an External Editor
• for Creating New Code
• As You Go
• Modes

Using Libraries

• External Classes
• External Classes
• with JavaTunes Modules
• up for JavaTunes Work

Session 5: HTTP Client

• Objectives

Overview

• Clients in Java - Existing Options
• RESTful Services
• Java HTTP Client
• HTTP Client - Features

Using HTTP Client

• Main Players
• Simple Example
• Tips - Builders and Products
• Tips - Nested Classes
• Tips - Interfaces and Factory Classes
• the Client
• the Request
• a Request Body
• Request / Response
• the Response
• 5.1A: HTTP Client
• Options for the Response Data
• the Response - Example
• Requests
• with Asynchronous Responses
• with Asynchronous Responses
• 5.1B: HTTP Client
• 5.2: REST Client Demo [Optional]

Session 6: Other New Features

• Objectives

Collection Factory Methods

• Factory Methods
• and Set.of()
• Entirely New
• Just Convenient - More Efficient

Multi-Release JARs

• to Support Multiple Releases of Java
• JARs - MR-JARs
• - Illustrated
• Layout - Simplest
• an MR-JAR
• API Principle
• Strategies
• Tools Support for MR-JARs
• with Caution
• 6.1: MR-JAR Demo [Optional]

Reactive Programming

• Programming Overview
• (Pull) - Synchronous
• (Push) - Asynchronous
• Programming - Observer Plus
• Streams - Overview
• API - Main Players
• of the Flow API

Miscellaneous

• Methods in Interfaces
• API Enhancements
• Methods in the Platform API
• Methods in the Platform API
• Expressions (Java 12-14+)
• Expression Detail
• Number Formatting
• Collection (GC)
• Garbage Collection (ZGC)
• Comparison G1 and ZGC

Session 7: Custom Runtime Images

• Objectives
• Runtimes
• Runtime Images with jlink
• 7.1: Custom Runtime Images [Optional]

Recap

• of What We've Done
• of What We've Done