In this article, we explore new Stream collectors that were introduced in JDK 9

A guide to the bridge design pattern and its Java implementation

A quick and practical guide to the CircularFifoQueue data structure from Apache Commons.

Learn how to use the native Java mail library to send emails with and without attachments.

Learn how to enable verbose GC in Java and how to interpret the resulting logs.

How to Convert between a List and a Set using plain Java, Guava or Apache Commons Collections.

Have a look at the Java 8 support for internationalizing and localization of an application.

How to convert an InputStream to a Reader using Java, Guava and the Apache Commons IO library.

Learn about relatively new Java optimization: string concatenation with invokedynamic

Learn different ways to filter a Collection in Java based on the values of another list

There is plenty to catch us out when we write multi-threaded or concurrent code within Java. Here we explore some common problems and their solutions.

Learn about using constants in Java with a focus on common patterns and anti-patterns

Learn how we can use a Java BitSet to represent a vector of bits, gett familiar with the BitSet internals, and take a closer look at its API

A quick example and explanation of the regionMatches() API of the standard String class in Java.

Get a quick overview of the first steps needed to migrate from Java to Kotlin.

Learn how to parse an XML file in Java using SAX Parser.

Learn about additions to the String API in Java 11.

Introduction to Javassist - a bytecode manipulation library, covering its basic features.

Java 15 introduces Sealed Classes, a preview language feature, that allows classes/interfaces to restrict which other classes/interfaces may extend or