How To Fix Java Not Opening Jar Files [2025]

Is Java not opening JAR files on your Windows 10 or 11 machine? This guide will walk you through the steps to run JAR files with Java, set the right file associations, and fix issues preventing JAR files from launching. You’ll also learn how to update Java, adjust environment variables, and open executable JAR files seamlessly. Tags: fix Java Not Opening Jar Files how to fix java not opening jar files java not opening jar files java not opening jar files windows 11