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Sven Woltmann
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declare and initialize arrays in java
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How to Initialize Arrays in Java

Sven WoltmannSven WoltmannApril 9, 2024
How to declare and initialize arrays in Java? How to copy and fill them? How to convert lists, sets and streams into arrays?
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hexagonal architecture spring boot
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Hexagonal Architecture with Spring Boot
[Tutorial]

Sven WoltmannSven WoltmannDecember 27, 2023
In the fifth and final part of the series on hexagonal architecture, we migrate the Quarkus application to Spring Boot – once more without changing a single line of code in the core of the application.
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java 22 features
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Java 22 Features
(with Examples)

Sven WoltmannSven WoltmannDecember 7, 2023
All the new Java 22 features with examples: Unnamed Variables & Patterns, Stream Gatherers, Foreign Function & Memory API, Launch Multi-File Source-Code Programs ... and more!
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java foreign function and memory api - ffm api
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Java Foreign Function & Memory API
(FFM API)

Sven WoltmannSven WoltmannDecember 7, 2023
Learn how to access libraries of other programming languages from Java using the Foreign Function & Memory API.
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stream gatherers
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Stream Gatherers – Write Your Own Stream Operations!

Sven WoltmannSven WoltmannDecember 6, 2023
Find out what a stream gatherer is and how you can use it to implement any intermediate stream operations.
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statements before super(...)
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Flexible Constructor Bodies in Java: Executing Code Before super()

Sven WoltmannSven WoltmannDecember 5, 2023
As of Java 22, you can finally execute code in constructors before calling super(...) or this(...). This article shows you how.
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string templates java
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String Templates in Java

Sven WoltmannSven WoltmannDecember 5, 2023
Learn how String Templates in Java simplify the composition of strings from text, variables and calculated values.
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unnamed variables and patterns
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Unnamed Variables and Patterns in Java

Sven WoltmannSven WoltmannDecember 4, 2023
Variables & patterns that we have to define but do not need can be designated with '_'. Find out what you need to bear in mind.
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Hexagonal Architecture with Quarkus
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Hexagonal Architecture With Quarkus
[Tutorial]

Sven WoltmannSven WoltmannOctober 30, 2023
In the fourth part of the series on hexagonal architecture, we migrate the existing application to a Quarkus application... without changing a line of code in the application core.
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ports and adapters feature image
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Ports and Adapters Java Tutorial: Adding a Database Adapter

Sven WoltmannSven WoltmannOctober 4, 2023
In the third part of the series on hexagonal architecture, we extend the application with a JPA adapter that stores the data in a MySQL database.
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