JAR files are like EXE files, except that they need a Java framework to run. Imagine them as EXE files on Windows, which you can double-click to launch the program. When you run an EXE file, it ...

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.

Although, due to the lack of NPAPI support, Java applets stopped working in Microsoft Edge, Google Chrome, and other Chromium-based browsers, you can still install and run Java on Windows 11 PCs.