The icon for the JAR file will be updated and for all JAR files on your system, you can now double-click and open them.Check the ‘Always use this app to open.From the menu that opens, select Java(TM) Platform SE binary.Right-click the JAR file and select Open With… from the context menu.If the file doesn’t open, or the icon isn’t updated, follow the steps below. It will return the version of Java that’s installed.Īfter installing the Java runtime, the icon of the JAR file should automatically change to show it is associated with Java. To verify the installation, open Command Prompt and run the following command.When the installation completes, you will see a message telling you it was successfully installed.
Run the EXE file that downloads and it will install Java.Click the Download button, and then click the Agree and Download button.Now that we’ve determined if you have Java on your system or not, we can get down to opening a JAR file. Operable program or batch file.’, that means you do not have Java installed on your system. If the command returns ‘java’ is not recognized as an internal or external command,.Check for Java Runtimeīefore you can open a JRE or JAR file on Windows 10, you need to check if you have the Java runtime installed on your system. It is possible that it is already installed and you do not have the right version to run the Java file on your system. Both can be run the same way but you will have to install the Java runtime on your system. With Java files, you may encounter either the JAR or the JRE file extension. That said, you can still find a purely Java-based file. Java is used by a lot of apps however, that doesn’t mean you will always be running JAR files when you run a Java-based app.