Java SE 9: Exploiting Modularity and Other New Features

• Kurz je vhodný pro Java programátory, kteří používají starší verzi Javy (5-8) a chtějí se obeznámit s novinkami Java SE 9, například psát modularizované knihovny.

• Design applications to take advantage of the module system and its more reliable configuration, improved security and performance, and more easily scalable applications.
• Migrate existing applications to a modular applications in a step-by-step manner, choosing which parts of the application to migrate first.
• Deal with common problems encountered in migrating an application, including, cyclic dependencies and split packages.
• Use services to make modularized applications more robust and easily extensible.
• Create multi-release JAR files that can be run on different Java releases.
• Use convenience methods to reduce code that seems verbose, inefficient or boilerplate, and increase readability.
• Use JShell to quickly run small code experiments and test new APIs.

• Znalost Java SE programování na běžné úrovni, generics, lambda výrazy, Stream API.

Why Modules?

• Module System
• Levels of a Typical Application
• How Does Java SE 8 Address Maintainability and Reliability?
• Classes, Subclasses, Interfaces
• Class Level Unit of Reuse (Java SE 8)
• Packages
• JARs
• JAR Files and Distribution Issues

Working with the Module System

• Projects Before Modularization
• module-info.java: Introduction
• Creating a Truly Modular Project
• Compiling Modular JAR Files
• Accessibility Between Classes
• Readability Between Modules
• What Is Readable from the competition Module?
• The Effects of Exporting

Modular JDK

• Modular Development in JDK 9
• The JDK
• The Modular JDK
• Modules in JDK 9
• Java SE Modules
• The Module Graph of Java SE
• The Base Module
• Finding the Right Platform Module

Creating Custom Runtime Images

• What Is a Custom Runtime Image?
• Link Time
• Using jlink to Create a Custom Runtime Image
• Modules Resolved in a Custom Runtime Image
• Advantages of a Custom Runtime Image
• JIMAGE Format
• Footprint of a Custom Runtime Image
• jlink Resolves Transitive Dependencies

Migration

• Typical Application
• The League Application
• Run the Application
• The Unnamed Module
• Top-Down Migration
• Dependencies
• Check Dependencies
• Typical Application Modularized

Services

• Module Dependencies
• Service Relationships
• Expressing Service Relationships
• Using the Service Type in competition
• Choosing a Provider Class
• Module Dependencies and Services
• Designing a Service Type
• TeamGameManager Application with Additional Services

Multi-release JAR files

• Packaging an Application for Different JDKs
• Packaging an Application for Different JDK Versions
• The Solution: A Multi-Release JAR file
• What Is a Multi-Release JAR File?
• Structure of a JAR File
• Structure of a Multi-Release JAR File
• Search Process in an MRJAR
• Creating a Multi-Release JAR File

Private Interface Methods

• Private Methods in Interfaces
• Java SE 7 Interfaces
• Implementing Java SE 7 Interface Methods
• Implementing Methods in Interfaces
• What About the Problems of Multiple Inheritance?
• Inheritance Rules of default Methods
• Interfaces Don't Replace Abstract Classes

Enhancements to the Stream API

• One More Benefit of Default Methods
• Changing a Java Interface
• Why Enhance the Stream API?
• An Ordered List
• takeWhile Provides a Solution
• The Effects and Benefits of takeWhile
• An Unordered List
• filter vs takeWhile

JShell

• Has This Happened to You?
• A Million Test Classes and Main Methods
• JShell Provides a Solution
• Comparing Normal Execution with REPL
• Getting Started with JShell and REPL
• Scratch Variables
• Declaring Traditional Variables
• Code Snippets

Convenience Methods for Collections

• What Are Convenience Methods?
• Many Convenience Methods in Java SE 9
• Key Collections Interfaces
• Overloading the of Convenience Method
• Why Overload the of Method?
• Growing a Collection
• ofEntries() Method for Maps
• Immutability

Convenience Methods for Arrays

• Arrays
• Modeling DNA Strands
• Working with DNA Strands
• Working with DNA Strands by Using a for Loop
• Convenience Methods in the Arrays Class
• Equating DNA Strands
• DNA Subsequences
• Equating Subsequences of DNA

Enhanced Deprecations for APIs

• What Is Deprecation?
• What Is Enhanced Deprecation?
• How Do You Deprecate an API?
• Using @deprecated
• Enhancements to the @Deprecated Annotation in JDK 9
• Using the @Deprecated Annotation
• Notifications and Warnings
• Compiler Deprecation Warnings