Learn about creational design patterns along with examples of core Java classes that use them to create and obtain instances of objects.

Explore how to throw an exception from Java 8 Optional.

Learn about the differences between the PermGen and Metaspace memory regions in Java

Take a look at different ways to check if a String is a palindrome in Java.

Learn how to use Parallel Collectors, a library of Java Stream API collectors designed to overcome limitations of standard Parallel Streams.

Learn how to format output using Java's PrintStream.printf() method

Interested to learn about database migrations? Check our article explaining how to perform database migrations in Quarkus applications.

Learn how to address the problem of Balanced Brackets, also known as Balanced Parentheses, with Java.

Learn different ways to measure elapsed time in Java

Project Panama delivers, Dockerizing Java applications, EFK stack for logging, a little about queuing theory, and COBOL ain't gonna go anytime soon.

Learn how to collect Java Streams to immutable Collections.

Learn about how we can search for free ports for Java servers.

The protected modifier helps Java classes to encapsulate their implementation and also share it with related types. Explore how this modifier works in practice.

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.