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Heinz's Happy Hour Season 03

Join us every first Thursday of the month at 16:00 UTC for your cup of hot Java at Heinz's Happy Hour. Free to attend and take part. Subscription gives you access to all the recordings. Topics will be whatever your host Heinz Kabutz comes up with. Satisfaction guaranteed or your money back!

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Dates and Topics

  • Dec 6, 2018: Project Loom, Fibers and Blocking IO
    Writing concurrent code is easy. We simply start a thread, point it at a network socket and let it read and write data. But having one system level thread per socket is too heavy-weight. One alternative is Java.NIO, with non-blocking sockets. But the coding is a lot more involved, and the latency sometimes worse. In this webinar we will look into the future at what Project Loom will give us (hopefully) with the advent of fibers. We will explain what fibers are, what they can do, and what they might not be able to do. Will also demonstrate how the code would look with the new construct. Preparation: Build your own "loom" JDK, so you can follow along with the examples. Note that Project Loom is in active development, so anything we say in the webinar is subject to change. Maybe before tomorrow.
  • Jan 3, 2019: Acing the Threading Questions At Your Next Job Interview
    A lot of Java job interviews include questions on threading, even when the actual job does not require any knowledge of concurrency. It's like asking an airline pilot whether he has a driver's license. In this webinar we first look at what is so magical about concurrency and why interviewers ask seemingly irrelevant questions. We then look at specific questions and their answers. We also examine what may be wrong with the questions.
  • Feb 7, 2019: Threading Problems
    Threading is easy - if you don't do it. The biggest challenge is that we don't get immediate feedback when we make a mistake. It can take years of production before our code fails. When it does, things blow up catastrophically. Today's webinar is an extract from our new Mastering Threads Course (Early 2019 Edition).
  • Mar 7, 2019: Puzzle: Is a Programmer a Person?
    Great question. In today's webinar, we aim to find out the truth with some Java code, based on our latest Java Specialists' Newsletter. Our guest today is Maurice Naftalin, author of the most successful book on the topic of Java Collections.
  • Apr 4, 2019: HttpClient in Java 11
    Java 11 added the HttpClient. It supports HTTP/2, and asynchronous communication via nonblocking sockets.
  • May 2, 2019: Parallel Divide and Conquer with CompletableFutures
    CompletableFutures are the rage today. We use them to describe complicated concurrent workflows. For example, HttpClient in Java 11 returns them when we send asynchronous requests. They can also describe parallel divide and conquer workflows. In this webinar, we will start by parallelizing a large Fibonacci calculation with Fork/Join. We will then change java.math.BigInteger to multiply in parallel. You will learn how to patch with the new modules system. Then we will show the issues with Fork/Join and show a solution based on CompletableFuture. This webinar will be interesting for intermediate to advanced Java programmers.
  • Jun 6, 2019: Mind Hacking for Health
    Laziness is one of three great virtues of a programmer, according to Larry Wall, inventor of Perl. And it is true. You need to have a certain amount of laziness to be able to sit on your backside all day, subsisting only on gummy bears and coffee. Of course programmers understand that being active is good for them, but it does not change the relief we feel when we sit back in our chairs.
  • Jul 4, 2019: Topic TBD
  • Aug 1, 2019: Topic TBD
  • Sep 5, 2019: Topic TBD
  • Oct 3, 2019: Topic TBD
  • Nov 7, 2019: Topic TBD


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