A few days ago, there was a topic “How a JUG Leader can become a Java Champion?” In JUG mailing list. I talked about that with some Java Chamions in JOnsen conference. So I write about this topic. What is a Java Champion? The official web …

Jigsaw, the JSR 376 Java Platform Module System Review Reconsideration Ballot has been approved. https://jcp.org/en/jsr/results?id=6016 I’m glad to hear that. But still remains Final Approval Ballot.

On 24 Jun. the JUG I founded, KanJava had a BIG event called KanJava Party 2017 at Microsoft Japan Kansai branch. Participants were over 100 people. There were 12 sessions about Spring Security, JUnit5, Akka Stream, Domain Driven Developme…

I’m the founder of KanJava which is Japanese JUG. We’ve managed this JUG for 8 years. We have over 600 members and hold a event almost every month in Osaka or Kyoto. Each event has at least 40 participants. When you come to Japan, please c…

Proposed schedule change for JDK 9 JDK 9 GA date is moved out by eight weeks, from 27 July to 21 September. Because Jigsaw was voted against on the public review, so it needs public review ballot again. JavaOne is held from 1 October to 5 …

Last year I had a presentation in Scala Matsuri in Tokyo, Japan (Matsuri/祭 means festival in Japanese). This is not about Scala itself, it’s about the byte code representation of Scala code. Here is the slides. How Scala code is expressed…

http://www.oracle.com/technetwork/java/javamagazine/index.html Java Magazine is a bimonthly deep dive into Java and the JVM. Every issue contains explanations about the language and the platform written by experts and members of the Java d…

I’m dividing a Monolith application into microservices. I have end to end test scenarios. So after I moved one function to a microservice, I tried to re-test these scenarios. But I had a problem in an error case. For example, in a case whe…