If you have the Java Runtime Environment installed, and the JAR file is executable, it should open with a double-click. Sometimes, you might see a pop-up to choose which app to run the file.

They are unique and unlike other files, you can not just double-click on them to open the file. This is a complete guide on how to open VMDK, VHDX, VHD files in Windows 11/10.

Run or open a JAR file? Sometimes when a person uses the term “open a JAR file” they really mean they want to run a JAR file. To run a JAR file you must first install Java on your computer. With Java ...