Learn different ways of iterating through the entries of a Map in Java.

Have a look at the UnsupportedOperationException and how to avoid it when working with lists in Java.

A quick and practical overview of Class.isInstance and Class.isAssignableFrom methods.

Learn several approaches for finding the kth largest element in a set of unique numbers using Java.

Learn how to implement AES encryption and decryption using the Java Cryptography Architecture.

This article describes how we may get the current date, current time and current time stamp in Java.

Learn the concepts around servlets, their containers, and a few essential objects they revolve around.

A quick guide to converting a byte array to a Writer using Java, Guava or Commons IO.

Learn how to use Java's dynamic proxies - one of the primary proxy mechanisms available in the language.

Learn how to determine if a Java String contains all of the letters in the alphabet

In my last post, I described the day period support added with JDK 16 Early Access Build 25. That same build also added methods for checking indexes and

Every now and then I jump on classes with multiple constructors or classes that are rigorous to work with. Let alone not being able to mock part of their

Spring MVC is a web framework based on the model–view–controller pattern. It is based on the Spring principles and supports a wide range of server-side

JDK 16 Early Access Build 25 (2020/11/18) includes changes for JDK-8247781 ("Day periods support"). As stated in the JDK 16 Early Access Build 25 Release

Previously we used Hoverfly among its state feature. So far our examples have been close to an absolute request match, thus on this blog we will focus on

Main points: DataWeave 2.0 provides mapping capabilitiesJava and DataWeave can achieve the same mappingsDataWeave mapping operator is less verbose than

Previously we created successfully a Zookeeper ensemble, now it’s time to add some Kafka brokers that will connect to the ensemble and we shall execute

This post shows how to test for expected exceptions using JUnit 5. If you're still on JUnit 4, please check out my previous post. Let's start with the

A quick and practical guide to applying the Locality-Sensitive Hashing algorithm in Java using the java-lsh library.

Use CipherInputStream and CipherOutputStream classes to encrypt and decrypt files in Java.