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Latest tutorials

How to fix CVE-2023-29017

The CVE-2023-29017 is about a flaw in how VM2 handles errors asynchronously within a sandbox...

How to add an Admin User in Keycloak

Creating an admin user in Keycloak is a mandatory step for automating administrative tasks and...

How to run standalone Jakarta Batch Jobs

Jakarta Batch, formerly known as Java Batch, is a specification that provides a standardized approach...

Securing WildFly Management Console with Keycloak

WildFly 29 introduces the ability to secure WildFly Management Console with KeyCloak OpenID Connect Clients...

Develop a REST application using Jakarta EE and AngularJS

In this tutorial, we will walk through the process of developing an AngularJS frontend for...

JBang Cheatsheet (2023)

Here is my JBang cheatsheet which can help as a reference to code self-contained source-only...

Migrating from Java 8 to Java 17 with OpenRewrite

In this article we will discuss on how to migrate Java applications from Java 8...

Parsing PDF in Java made simple

When it comes to parsing PDF files in Java, two popular libraries stand out: Apache...

How to inspect a Thread Dump like a pro

This article will guide you in troubleshooting Java application by analysing a Thread dump with...

How to configure Keycloak Hostname

This article describes how to configure the hostname for the Keycloak server. By default, the...

Designing Quarkus Front-Ends with Vaadin made easy

Vaadin Flow provides a comprehensive set of UI components and tools for creating rich and...

Java 21 Unnamed Classes and Instance Main Methods

Java 21 introduces two language core features: Unnamed Java Classes and a new launch protocol...

Cheatsheets

Quarkus 3 Cheatsheet (2023)

Quarkus is a popular Java framework designed to build lightweight, fast, and efficient applications. It...

JUnit 5 Cheatsheet (2023)

This article contains a JUnit 5 Cheatsheet which you can use as handy reference to...

Docker and Podman CheatSheet for DevOps

Docker and Podman are both tools that allow developers to package applications and their dependencies...

JBoss cheatsheet for Linux Administrators (2022)

This is my JBoss / WildFly cheatsheet I use for managing the application server on...

JBoss / WildFly XML descriptors reference

WildFly uses a set of custom XML descriptors which can be used to customize Enterprise...

REST Services Cheat sheet

Here is a comprehensive JAX-RS Cheatsheet to help you code your REST Services. JAX RS-Annotations...

REST Services cURL cheatsheet

Here is a cheatsheet that might be useful for REST developers that need a simple...

JBoss Datasource cheatsheet

Here is a cheatsheet with some examples of Datasources configurations which are valid for JBoss...