Heinz's Happy Hour Webinar Season 02

Live Java Learning Webinars to supplement your knowledge

Heinz's Happy Hours are back!


We will explore topics primarily useful to students of these courses:

However, even if you are not enlisted in these courses, you can join our webinar series.

We will run HHH 2 until the end of 2018, meeting once or twice a month, as we get inspired.
Each session should run between 20 and 30 minutes.

If you enroll in this course, you will get a link to register for the webinar series. You will also get access to all the recordings of our HHH2 webinar series.


  • 27.03: MethodHandles vs Reflection vs VarHandles Shootout
  • 03.04: Grokking the String Table in Java 9 with jcmd
  • 05.04: Bonus Webinar - Acyclic Visitor vs MethodHandles vs Traditional GoF Visitor
  • 10.04: Abstract Class and Object Recursion Patterns
  • 12.04: Interpreter and Mediator Patterns
  • 16.04: Builder and Essence Patterns
  • 20.04: Strategy, Null Object and Prototype Patterns
  • 23.04: Extension Object Pattern
  • 27.04: Default Visitor Pattern
  • 30.04: Effects of Modern Java on How We Can Design Code
  • 28.05: Enough java.lang.String to Hang Ourselves ...
  • 05.06: Safe Publication Between Threads in Java (3pm UTC)
  • 12.06: Concurrency and JHeappo (8am UTC)

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

  00. Register for Webinar Series
Available in days
days after you enroll
  Bonus Section
Available in days
days after you enroll

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.
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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.

Get started now!