https://jensknipper.de/tags/java/ Recent content in Java on Jens Knipper https://jensknipper.de/%3Clink%20or%20path%20of%20image%20for%20opengraph,%20twitter-cards%3E https://jensknipper.de/%3Clink%20or%20path%20of%20image%20for%20opengraph,%20twitter-cards%3E Hugo en Mon, 19 Jan 2026 01:00:00 +0000 https://jensknipper.de/blog/demystifying-dependency-injection-what-and-why/ Mon, 19 Jan 2026 01:00:00 +0000 https://jensknipper.de/blog/demystifying-dependency-injection-what-and-why/ Most projects use Dependency Injection in some form. However, many developers take it for granted and do not really question what it is or why they are using it in the first place. This article aims to answer those questions, even though they are rarely asked. https://jensknipper.de/blog/java-aktuell-lambda-testing-article/ Tue, 25 Apr 2023 01:00:00 +0000 https://jensknipper.de/blog/java-aktuell-lambda-testing-article/ Nachdem ich über das Thema auf der JavaLand einen Talk gehalten habe, habe ich die Chance bekommen das Ganze in Form eines Artikels in einer Zeitschrift zu veröffentlichen. https://jensknipper.de/blog/openvalue-meetup-lambda-testing-talk/ Thu, 10 Nov 2022 01:00:00 +0000 https://jensknipper.de/blog/openvalue-meetup-lambda-testing-talk/ Last week I hold my talk "Local testing of AWS serverless lambda functions" at a virtual meetup of OpenValue. In this post, you can find the slides and the recording of my talk. https://jensknipper.de/blog/speaker-javaland-newcomer/ Fri, 07 Oct 2022 01:00:00 +0000 https://jensknipper.de/blog/speaker-javaland-newcomer/ I struggled with a problem at work, was able to solve it neatly and thought it would make a great topic for a talk or a blog article. So I applied at the call for papers of the JavaLand newcomer program with it and got accepted! https://jensknipper.de/blog/receiving-emails-in-java/ Mon, 30 May 2022 01:00:00 +0000 https://jensknipper.de/blog/receiving-emails-in-java/ I was recently in need to write some small demo project which was receiving and processing mails. There is a lot of documentation for sending mails, but gathering information about the receiving and processing part is less easy. https://jensknipper.de/blog/openvalue-meetup-greenmail-talk/ Sat, 05 Jun 2021 01:00:00 +0000 https://jensknipper.de/blog/openvalue-meetup-greenmail-talk/ Last week I hold my talk "Testing email with GreenMail, a mock mail server" at a virtual meetup of OpenValue. In this post, you can find the slides and the recording of my talk. https://jensknipper.de/blog/greenmail-mock-mail-server-dev-setup/ Tue, 16 Feb 2021 01:00:00 +0000 https://jensknipper.de/blog/greenmail-mock-mail-server-dev-setup/ Are you sending mails featured with HTML and CSS and want see how they look before pushing your changes to production? You also do not want mails to leak from your local environment to your customer? A mock mail server like GreenMail might just be the tool you need. https://jensknipper.de/blog/dealing-with-generic-fields-in-jcodemodel/ Wed, 14 Oct 2020 01:00:00 +0000 https://jensknipper.de/blog/dealing-with-generic-fields-in-jcodemodel/ Another article about JCodeModel. This time we will make a short excursion about how to generate generic fields in JCodeModel. https://jensknipper.de/blog/generating-enums-in-java-with-jcodemodel/ Sun, 11 Oct 2020 01:00:00 +0000 https://jensknipper.de/blog/generating-enums-in-java-with-jcodemodel/ This article will show you how to generate your own enum classes with jCodeModel. A framework to generate java classes.