Is a JAR file just a ZIP file? A Java JAR file is really just a ZIP file. Java applications can be made up of hundreds or even thousands of classes, property files and other artifacts. When a Java ...

Why does double-clicking not run my JAR file? Some Java installers configure Windows or Ubuntu to run Java JAR files when they are double clicked, but not every installer supports this configuration.

Want to know how to set up a Minecraft server with your friends? Here's all you need to know with step-by-step instructions.

Open source licenses Each of the open source Java projects covered in this series is subject to a license, which you should understand before integrating the project with your own projects.