Category Archives: Programming

Pattern matching for “instanceof” in JDK16 | The Two Minutes Tuesday 016

Posted on 25. January 2021 by Markus Karg

The new pattern matching enhancement for the instanceof operator in #Java16 spares you a lot of typing, and makes the code more concise and much easier to understand! #JDK16 is stable and will be released in March. Time to look … Continue reading →

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Spare keystrokes with the record keyword | Modern Java | JDK 16 | Head Crashing Informatics 26

Posted on 23. January 2021 by Markus Karg

Hey guys! How’s it going? The record keyword is ready for production use in JDK 16, which officially will be here mid March. Spare lots of keystrokes and get rid of code generators and IDE magic with this new keyword! … Continue reading →

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Java 15 vs Java 8 | Modern Java Features | Head Crashing Informatics 25

Posted on 9. January 2021 by Markus Karg

Hey guys! How’s it going? Backporting an application from Java 15 to Java 8 to convince you how much better coding in modern Java is! Java 15’s modern language features and API enhancements makes coding so much better! In this … Continue reading →

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Artikel in iX 1/2021 zu Jakarta EE 9

Posted on 19. December 2020 by Markus Karg

Ausgabe 1/2021 der iX enthält einen Beitrag von mir zu Jakarta EE 9. Viel Spaß beim Lesen!

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JAX-RS Done Right! (X. – Custom Entity Providers)

Posted on 12. December 2020 by Markus Karg

Hey guys! How’s it going? Let’s write custom entity providers to process any document formats we like with JAX-RS – without sacrifying SoC! Today’s episode of “JAX-RS Done Right!” keeps Separation of Concerns while adding support for ANY document type … Continue reading →

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JAX-RS Done Right! (XI. – Migration to JAX-RS 3.0)

Posted on 28. November 2020 by Markus Karg

Hey guys! How’s it going? In today’s episode of “JAX-RS Done Right!” I will demonstrate how to migrate an existing JAX-RS application to the latest release of the Jakarta REST API aka JAX-RS 3.0. Code example can be found on … Continue reading →

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Jakarta EE 9 Premiere – Live Coding with Ivar Grimstad | Tonite with me on November 20th, 2020 at 20:00 CET

Posted on 15. November 2020 by Markus Karg

Hey guys! How’s it going? Chat LIVE #WithMe and Ivar Grimstadt (Jakarta EE Developer Advocate) while we are live coding on Jakarta EE 9’s premiere night! This is THE Jakarta EE fun event that you definitively MUST NOT miss in … Continue reading →

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JAX-RS Done Right! (IX. – Default Entity Providers)

Posted on 14. November 2020 by Markus Karg

Hey guys! How’s it going? Separating domain logic of the http body handling from technical aspects is easy in JAX-RS thanks to Entity Providers. In today’s episode of “JAX-RS Done Right!” we introduce Separation of Concerns to only have pure … Continue reading →

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Java API Enhancements

Posted on 17. October 2020 by Markus Karg

Hey guys! How’s it going? The Java SE API is enhanced in detail with each new generation of the JRE, besides the major JEPs lineup. 09: https://cr.openjdk.java.net/~iris/se/10/latestSpec/apidiffs/overview-summary.html 10: https://cr.openjdk.java.net/~iris/se/10/latestSpec/apidiffs/overview-summary.html 11: https://cr.openjdk.java.net/~iris/se/11/latestSpec/apidiffs/overview-summary.html 12: https://cr.openjdk.java.net/~iris/se/12/latestSpec/apidiffs/overview-summary.html 13: https://cr.openjdk.java.net/~iris/se/13/latestSpec/apidiffs/overview-summary.html 14: https://cr.openjdk.java.net/~iris/se/14/latestSpec/apidiffs/overview-summary.html 15: https://cr.openjdk.java.net/~iris/se/15/latestSpec/apidiffs/overview-summary.html The … Continue reading →

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Java Startup Performance

Posted on 3. October 2020 by Markus Karg

Hey guys! How’s it going? One of the major pain points even with the latest Java generation is its terribly slow startup time. There are things that you can do to improve it, so here is how to do them … Continue reading →

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