David Vlijmincx | Senior software developer

Learn about the different types of Arenas in Java's Foreign Function & Memory API and when to use each one.

In this post, we look at how to call a method from a C library in Java by using the foreign function API.

Calling a Java method from C code by passing a reference.

Introduction In this tutorial, you will learn how to set up an REST service using Jakarta EE. You will create a simple web service with two endpoints. The first one will return a JSON array of Strings and the second one will return a JSON object. Maven setup To build our Helidon REST service with Maven, we need to edit the POM file. This file defines essential project information like its name, group ID, and version.

Introduction In this post, I quickly wanted to show you how to use virtual thread with Spring. All you have to do is enable it. That is if you are already running Java 21 and using Spring 3.2.0 or later. Enabling Virtual Threads To enable virtual threads all you need to do is to create an applications.properties file in the resource directory if you don't have one already, and add the following line:

Both methods let you decide what a mocked object returns. thenReturn() returns a fixed value while thenAnswer() lets you use the parameters to determine a return value.