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Yes. I've used it multiple times on multiple machines, and it's 100% safe (downloaded directly from the source here). If you keep trying to boot Optifine and it just seems to open for a sec and then close, it'll fix it. I recommend it all the time. yes, it is safe i was a bit skeptical at first, but it works and isn't malware.
Type in Windows search "env" and press on "Edit environment variables for your account". Now if there's no "Path" named variable, create it. On the "Variable name" type "Path" and in the "Variable value" enter a path of your java.exe file. Then click ok, again ok and then try to open your program again. I hope this works.
This will ensure that .jar files are opened with Java by default. Command Line: Try running the .jar file from the command line. Open the Command Prompt or PowerShell, navigate to the directory where the .jar file is located, and use the command "java -jar filename.jar" (replace "filename.jar" with the actual name of the .jar file).
Reply reply. SkullDaisyGimp. •. Windows is really bad with file extensions and sometimes won’t run Java files like Optifine correctly. Jarfix is a simple utility that repairs the file extension and is completely safe, but may show up as potentially harmful because it’s an executable file that’s downloaded from the internet.
1. Sort by: Search Comments. doc_shades. • 2 yr. ago. if your .jar files are being opened with notepad that's just a windows file association issue. ever extension (.txt, .jpg, .mp3, .jar) is opened with a specific program by default. on your computer, windows is associating .jar files with notepad. right click on your .jar file and choose ...
I can testify that Jarfix is 100% legit. I used it myself a few years ago and absolutely nothing came of it (aside from being able to play modded mc properly) Unfortunately though, I do not remember what the download link was, I just know that it works and is safe. 1.
Jarfix makes it possible to double-click on a .jar file, such as a server.jar, to start it. You run jarfix.exe once only then leave it alone. You can even remove jarfix.exe once it has run once. Now double click on a server .jar. So I'm trying to create a server for me and my friends to play on, and I've done this in the past but that was years ...
Never used jarfix but my guess is all it does is fix the file association , which you can do manually by doing the above and ticking the box to always open with this app. The above method does/should work. Saves having to download another piece of s/w to do it. edit: if it is opening a cmd window are you picking java.exe ?
Jarfix is a simple utility that repairs the file extension and is completely safe, but may show up as potentially harmful because it’s an executable file that’s downloaded from the internet. Make sure you download it from the original website to avoid downloading an actual virus (: 1. Reply. true.
Award. mynameisperl. • 1 yr. ago. Right-click the jarfix icon, choose "Run as administrator"... 1. Award. I got jarfix to get mods and whatever blah blah when I try to open it it just says its ran uder an administrative profile or whatever and I know I….