{ javaReads }

The Java Keytool is a command line tool that can generate public key / private key pairs and store them in a Java KeyStore file.

My colleague Niklas Heidloff has started to create another version of our Cloud Native Starter using a reactive programming model, and he has also written an extensive series of blogs about it star…

Every Monday, we take a step back and look at all the cool stuff that went down during the previous week. Let’s see what happened in the Java world.

A blog about Java, Programming, Algorithms, Data Structure, SQL, Linux, Database, Interview questions, and my personal experience.

Oracle Corp said on Monday it had added new cloud computing data centers in five…

Learn about Java Tuple – a generic data structure and how we can use tuples in a Java. Tuple, by default, are not present in Java so use javatuples library.

This tutorial explains what nested classes are in Java, and how you create your own.

A sneak peek at improved Docker support coming to Spring Boot, and a collection of cool plugins for IntelliJ IDEA.

We discuss tools that help deploy your Maven applications to Kubernetes and Red Hat OpenShift, and then walk through an example.

I’m trying to understand why the following Java program gives an OutOfMemoryError, while the corresponding program without .parallel() doesn’t. System.out.println(Stream .iterate(1…

Record types are one of the most awaited features in Java 14; they promise to “provide a compact syntax for declaring classes which are transparent holders for shallowly immutable data”. One example where records should be beneficial are data transfer objects (DTOs), as e.g. found in the remoting layer of enterprise applications. Typically, certain rules should be applied to the attributes of such DTO, e.g. in terms of allowed values. The goal of this blog post is to explore how such invariants can be enforced on record types, using annotation-based constraints as provided by the Bean Validation API.

Compare two fundamental ways to relate classes, then practice debugging ClassCastExceptions in Java inheritance

Reactive Messaging Examples for Quarkus

A blog about Java, Spring, Hibernate, Programming, Algorithms, Data Structure, SQL, Linux, Database, JavaScript, and my personal experience.

The community of Enterprise Java supporters formerly known as Java EE Guardians have been undergoing own rebrand – they are now the Jakarta EE Ambassadors.