Java’s new release cycle introduces new features at a more rapid pace, requiring increased attention from users. This course provides in-depth coverage of the important new features through Java 11 LTS. It also provides an overview of useful new features in Java 12+ that are likely to appear in Java 17 (the next LTS release).
Technical coverage starts with the new Java Platform Module System (JPMS), which presents a fundamental shift in how applications are organized, and interconnected to the libraries they use. We introduce modules from the ground up, show how to use them, describe your choices in usage, as well as caveats and pitfalls. We also provide guidelines for migration from non-modular applications.
The course covers many other new and powerful features that will be useful to developers (see the detailed outline for specifics). The course also includes several extra optional labs and guided self-study exercises in these additional areas.
The course is very hands-on, including numerous code examples and programming labs that reinforce the concepts presented, so that attendees can immediately employ what they’ve learned in their current projects.
Understand the new Java release cycle and Long Term Support (LTS) releases
Be familiar with significant deprecated and removed features, and how to work around them
Create and use Java modules, understanding module descriptors, modular JARs, exports and dependencies, and the modulepath
Understand the structure and behavior of the modular JDK, how it supports modular applications as well as legacy classpath-based code, and the implications of strong encapsulation on each
Migrate classpath-based applications to Java 11, understanding the stages of migration and options available
Recognize the issues with 3rd party libraries in a migration effort, and how to work with them on the modulepath and classpath
Use local-variable type inference with var, including lambda parameters
Gain a practical working knowledge of the JShell REPL tool, including working with code snippets and variables, configuration, and using external libraries
Use the HTTP Client to access HTTP resources from Java, as well as understand the other options available
Work with various HTTP request and response types, using both synchronous and asynchronous techniques
Outline the new factory methods in Java Collections and understand native immutable collections
Describe the motivation for multi-release JAR files (MR-JARs), understand their structure, and how to create them
Understand the runtime behavior of MR-JARs in both legacy and modern JVMs, and principles and strategies for working with them effectively
Outline the principles of Reactive Programming and how it differs from traditional synchronous invocation models
Describe Reactive Streams and the role of the Flow API that defines the Java platform’s support for them
Understand the characteristics and benefits of custom runtime images
Use jdeps to analyze application dependencies, and create custom runtimes with jlink, for both modular and classpath-based applications
Explore some of the more important additional features and APIs, including new features for interfaces, the Process API, new JDK tools and command line options