Java

What is the JVM? Introducing the Java virtual machine

The Java virtual machine manages application memory and provides a portable execution environment for Java-based applications. Developers reap the rewards in performance, stability, and predictable runtimes.

By Matthew Tyson

Sep 3, 202513 mins

Development ToolsJavaProgramming Languages

JRebel Enterprise speeds configuration, code updates for cloud-based Java development

By Paul Krill

Aug 20, 20252 mins

Cloud ComputingDevelopment ToolsJava

Articles

Advanced unit testing with JUnit 5, Mockito, and Hamcrest

Integrate Hamcrest and Mockito with JUnit 5 for more sophisticated unit testing with assertions, simulations, and behavior verification using Mockito spies.

By Steven Haines

Jul 7, 2025 17 mins

App TestingDevelopment ToolsJava

What you need to know about Java wrapper classes

Since Java 21, wrapper classes have played an increasingly sophisticated role in Java’s type system. Here’s everything you need to know about updates for virtual threads, pattern matching, and more.

By Rafael del Nero

Jul 3, 2025 16 mins

JavaProgramming LanguagesSoftware Development

Jakarta EE 11 enterprise Java arrives

Latest release of the enterprise Java platform features simpler data access, more streamlined testing, and other enhancements for cloud-native and enterprise-level Java development.

By Paul Krill

Jun 26, 2025 4 mins

Cloud ComputingJavaProgramming Languages

Devops debt: The hidden tax on innovation

Dead code, security false positives, and idle cloud capacity are the leading drags on devops in Java environments. Here’s how to address them.

By Simon Ritter

Jun 23, 2025 7 mins

DevopsEngineerJava

Machine Learning in Java is Speeding Image Processing

Java developers can quickly implement image classification or object detection using pre-trained machine learning models.

Dec 18, 2020 6 mins

Java

Java 25 to change Windows file operation behavior

Some file operations on Windows have been changed for the sake of safety and consistency in the upcoming Java update.

By Paul Krill

Jun 16, 2025 2 mins

JavaProgramming LanguagesWindows

Spring Java creator unveils AI agent framework for the JVM

With the Embabel agent framework, written in Kotlin, Rod Johnson aims not only to catch up with Python agent frameworks, but to leapfrog them.

By Paul Krill

Jun 6, 2025 3 mins

Generative AIJavaKotlin

How to test your Java applications with JUnit 5

Learn how to write and validate unit tests with JUnit 5. This article shows you how to configure a Maven project for JUnit, write basic and parameterized unit tests, and use JUnit 5’s built-in assertions, annotations, and tags.

By Steven Haines

Jun 5, 2025 19 mins

App TestingDevelopment ToolsJava

Kotlin to be tied closer to Spring apps framework

Kotlin creator JetBrains aims to make the popular JVM language a top choice for server-side development.

By Paul Krill

Jun 3, 2025 2 mins

JavaKotlinProgramming Languages

CheerpJ WebAssembly JVM previews Java 17 support

CheerpJ 4.1 also brings support for SSL and audio in Java 11 and improved support for mobile devices, allowing complex Java applications to run across smartphones and tablets.

By Paul Krill

May 30, 2025 2 mins

JavaMobile DevelopmentProgramming Languages

Java turns 30, and there’s no stopping it now

Proponents say Java is the 'here to stay' language, prized for its enterprise-grade stability and ongoing innovation through the OpenJDK community.

By Paul Krill

May 23, 2025 4 mins

JavaPythonRust

How to use method references in Java

Get a deep dive into using method references in your Java programs, including stream operations, event listeners, and constructors and factories.

By Rafael del Nero

May 22, 2025 17 mins

JavaProgramming LanguagesSoftware Development

The best Java certifications for software developers

Yes, Java certification is still worth it, but it pays to know which ones will help you stand out. Here's what you need to know about Java course certificates and hiring in 2025.

By Bob Violino

May 19, 2025 10 mins

CertificationsDeveloperJava