Mastering Java 11

The Module System and other features of Java 11

Oracle produces a new "feature release" of Java every six month. Teams that do not move forward with this rapid pace, run the risk of having to work with outdated technology, and are often forced to code around shortcomings that have already been solved in more modern Java.

In this course, we teach the most important new features of Java 9, 10, and 11. It is ideal for programmers tho are currently programming Java 8, and who need to upgrade their systems, or even programmers that are using Java 11, but feel that they have not understood all the intricacies of the new version.

We begin with encapsulation improvements, where most of our time is spent on the Java Platform Module System (JPMS). We explore how we can use JPMS to modularize our own applications and libraries. We show how the file can give us better encapsulation and cleaner interfaces between modules. We then look at how deprecation is stricter and how we can build jar files that support several versions of Java.

Our next focus is on performance improvements in Java 11, looking at how Strings are enhanced, garbage collection, the Java Flight Recorder, and how we can use the JDK Mission Control to analyze performance bugs.

We then look at a few language improvements, specifically the new "var" construct, and how and when to use it. We then look at several small changes in the language that make coding more convenient.

We then investigate some additions to concurrency, such as how we can use VarHandles to atomically update fields, much like atomic field references worked in the past. We also show how to get the best performance from VarHandles, to match that of sun.misc.Unsafe. Lastly, we look at a few new concurrency improvements.

We end our Java 11 excursion by learning about tools and API improvements, beginning with the collection factory methods to create immutable List, Set and Map instances. We then spend some time learning about HttpClient, and the three modes of communication: synchronous, asynchronous, and reactive. We learn how to launch single-file Java programs without the need to first compile the classes, and how JShell acts as a Java REPL. We also learn about the new unified logging that gives us insight into how the JVM runs. Our last two topics are the new StackWalker API, allowing us to get more information of which methods are in our stack, and the new ObjectInputFilter to make serialization more secure.

During the training, we will always get a chance to try out what we have learned in carefully thought out exercises. This will help us understand and quickly internalize what we have just learned.

Your Instructor

Dr Heinz M. Kabutz
Dr Heinz M. Kabutz

Heinz Kabutz is the author of The Java Specialists’ Newsletter, a publication enjoyed by tens of thousands of Java experts in over 150 countries. He has been a Java Champion since 2005.

Course Curriculum

  About the Mastering Java 11 Course
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  Day 1
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Frequently Asked Questions

How long do I have access to a fully paid course?
How does lifetime access sound? After enrolling, you have unlimited access to this course for as long as you like - across any and all devices you own. Furthermore, if we move to another platform, we will offer you a free transfer of your account for all the courses that you have purchased.
Can I pay via PayPal?
Yes, you can for outright purchases, but not for recurring payments such as paying by installments.
Can I get back the EU VAT?
Absolutely. First off, be sure to enter the VAT number in the appropriate field during the payment process. Then contact Teachable and ask them to reimburse you the VAT.
May I share my login details with my colleagues?
Unfortunately not. The terms of usage are for a single license. Teachable tracks your progress through the curriculum, so you won't know how much you have watched. We offer discounts on bulk licenses by one company. Please contact us for bulk licensing.
May we use the course for running in-house courses?
You may, as long as each of the students in the class has a valid license for that course. For example, some companies run lunch time Design Patterns study groups using our material. This is an effective way to learn. Please contact us for bulk licensing.
What if I am unhappy with the course?
We would never want you to be unhappy! If you are unsatisfied with your purchase, contact us in the first 14 days to tell us what you are unhappy about, and we will give you a full refund and deregister you from the course.
When does the course start and finish?
The course starts now and never ends! It is a completely self-paced online course - you decide when you start and when you finish. We do recommend putting time aside and setting goals to complete the course.
Can I watch the course offline during my commute?
Teachable have an iOS app that lets you watch offline. Android is not supported unfortunately.

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