Intermediate Java | Next-Level Java Developer Skills

Session: The Java Module system (Jigsaw)

Lesson: Why JigSaw?

• Problems with Classpath
• Encapsulation and the public access modifier
• Application memory footprint
• Java 8’s compact profile
• Using internal JDK APIs

Lesson: Introduction to the Module System

• Introduce Project Jigsaw
• Classpath and Encapsulation
• The JDK internal APIs
• Java 9 Platform modules
• Defining application modules
• Define module dependencies
• Implicit dependencies
• Implied Readability
• Exporting packages
• Lab: Defining Modules
• Lab: Defining Modules

Lesson: The Module Descriptor

• Define module requirements
• Explain qualified exports
• Open modules for reflection
• Use ServiceLoader
• The provides and uses keywords
• Lab: Modules and the ServiceLoader
• Lab: Using Reflection on modules

Lesson: Working With Modules

• Being backwards compatible
• The ModulePath and ClassPath
• Unnamed Modules
• Automatic Modules
• The JLink tool
• Lab: Migrating to modules

Session: JShell

Lesson: JShell

• Introduction to JShell
• Running Expressions in JShell
• Importing packages
• Defining methods and types
• Using the JShell editor
• Save and loading state
• Lab: Working With JShell

Session: Accessing Resources

Lesson: Java Data Access JDBC API

• Connecting to a database using JDBC
• Executing a statement against a database that returns a ResultSet
• Setting up and working with PreparedStatements
• Extracting multiple rows of data from a ResultSet
• Inserting, updating and deleting rows in a table
• Tutorial: Simple Maven Setup with Eclipse
• Lab: Intro to JDBC

Lesson: Introduction to Annotations

• Discussing how annotations work in Java
• Understanding what is required to work with Java’s annotations
• Using annotations
• Other technologies that are using annotations

Lesson: Introduction to CDI

• Understand the value of CDI
• Explore dependency injection (DI)
• Understand alternatives
• Understand annotation processing
• Use and configure CDI
• Lab: Introduction to CDI
• Lab: Adding CDI Qualifiers (optional)

Lesson: Overview of JPA

• Discuss Object to Relational (O/R) Mapping (ORM)
• Explore the Java Persistence API (JPA)
• Explain the ORM framework configuration
• Map a ‘simple’ entity to a database table
• Examine how to read, write and search for entities
• Lab: Introduction to JPA

Session: Multithreading and Concurrency

Lesson: Introduction to Multithreading and Concurrency

• Principles of Multithreading
• The Thread class and Runnable interface
• Explore thread synchronization
• Introduce the Java Concurrency API
• Lab: MultiThreading
• Lab: Futures

Lesson: Concurrent Java

• Thread management using Executors
• The common thread-pool
• Submitting and controlling asynchronous tasks
• Explore the locking API
• Lab: Working with Concurrent Java
• Lab: CompletableFuture

Lesson: Non-blocking asynchronous tasks

• The CompletableFuture
• Define non-blocking processes
• Exception handling in multithreaded processes
• The Fork-Join framework
• Lab: ForkJoin
• Lab: CompletionStage (optional)

Session: HTTP Client API

Lesson: The HTTP Client API

• Making HTTP (Hypertext Transfer Protocol) requests
• Explain Incubator Modules
• HTTP2 Client API
• Introduce WebSockets
• Communicate with WebSocket endpoints
• Lab: HTTP Clients

Session: More Java

Lesson: Other New Java Features

• Enhancements on the Optional class
• Improvements made in the Process API
• The Stack-Walking API
• The HTTP2 Client
• The Multi-Resolution API
• Lab: Working with Native processes

Lesson: Performance Optimizations

• Ahead-Of-Time Compilation
• Hotspot Diagnostic commands
• Variable and Method Handles
• Lab: JIT Compiler

Lesson: Memory Management

• Understand memory management in Java
• Discuss the various garbage collectors
• The Garbage-First (G1) Garbage Collector
• The No-Op and ZGS Garbage Collectors

Session: Reflection and References

Lesson: Reference Objects

• List the kinds of object references available in Java
• Introduce Weak, Soft and PhantomReference
• Explain the ReferenceQueue
• Lab: Reference Objects

Additional Topics: Time Permitting

These topics will be included in your course materials but may or may not be presented during the live class depending on the pace of the course and attendee skill level and participation.

Lesson: Introspection and Reflection

• Reflection classes
• Introspection
• Dynamic invocation of methods
• Using annotations
• Type annotations
• Receiver parameter
• Lab: Introspection and Reflection

Lesson: Project Lombok

• Introduce the Lombok Project
• Configure the Lombok Annotation processor
• Introduce some of the commonly used Lombok annotations
• Lab: Project Lombok