Here I should mention that I already have Java Runtime Environment installed on this laptop, so is technically possible to run the jar file without installing the JDK but the JDK makes it more convenient and more user-friendly. In any case, the issue is usually one of two things, either you don’t have the Java Development Kit installed on your PC or you haven’t set it as the default program for opening your. So, first is the WinRAR issue, now if you don’t have WinRAR installed on your computer, then yours might look different, maybe a plain file icon like in the image below: STAGE 1: Installing JDK/JRE to resolve the file format issue jar file without making many modifications to your system configuration, then this could be a go-to solution for you. More so, if you just want to quickly run your.

With this solution, there’s no need to tweak your registry or run some complex commands, making it convenient for a typical everyday user who’s just getting started with programming and doesn’t yet have the competence to make the registry tweaks and run all the commands. There are several possible ways to resolve this issue, some demand more technical skills than others, below is a two-stage process I discovered that can easily resolve this issue without the need for deep technical skills. jar file now looks like an actual Java file, when you double-click on it, either nothing happens or you get a flash of the DOS command terminal. In such a situation, when you right-click and select properties, you will see from the type of file that is actually a java file with. Usually in this situation, your Java files will not look like a regular java file as shown in the image below, it might look just like some WinRAR file if you have WinRAR or some other archive software installed on your computer. If you don’t have the JDK entirely, then nothing will happen at all when you double-click. jar files.Īs such, when you try to run your java files, you get a very brief pop up of the dark command prompt terminal which will disappear almost immediately without opening your expected Java program. If for some reason you are unable to run your Java programs in Windows by double-clicking the jar file, oftentimes is either you don’t have the Java Development Kit (JDK) installed on your PC or you haven’t created the right association for the execution path of the java files, in other words, you haven’t set Java as the default program for opening your.

How to run jar file windows