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.

The Java JDK (Java Development Kit) is a software development environment that creates Java applications.

Java is a cross-platform programming language from Oracle that anyone can use. One thing that you can do with Java is create a text document that you can open in Windows' Notepad program.