Windows 10: unknown .jar executable file that suddenly appeared on my pc

Hello, I recently discovered an unknown .jar file on my Windows system that occupies 5.8GB of storage. I'm concerned it might be malware or unwanted software. I've taken the following steps but would appreciate your guidance: Ran a thorough scan using AVAST antivirus, which didn't flag it as a threat. Checked recently installed software but couldn't find any associated with the .jar file. Despite these efforts, I'm still unsure about the file's origin and purpose. Any suggestions on how to identify the file's purpose or the software it belongs to? Is there a way to safely analyz

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jar files

Fixing .jar file opening on Windows requires two steps:

• Open the Control Panel, and chose "Default Programs - Associate a File type or protocol with a program". Find .jar extension (Executable JAR file) there, and pick Java as default program to open this extension. It will probably be listed as "Java Platform(SE)".
  A faster alternative perhaps is straightforward right-click on a .jar file, and then change associated program by clicking on the "Change..." button.
• Now open the regedit, and open the HKEY_CLASSES_ROOT\jarfile\shell\open\command key. Luckilly for us, we may specify parameters there for the (Default) value. This is normally: C:\Program Files\Java\jre7\bin\javaw.exe" -jar "%1" %*

I Hope this Answers your Question!

 

.java to .jar file

Hi guys!
I have a problem i think i dont know how to do this little thing
I have searched around the web, but i cant find anyone to explain it how to
and where to put this code down here in order for the compilator to convert it
from .java to a .jar file so the program or games i do in neatbeans can be executed in
my mobile phone!
Anyone can help??? The code is this one:
jar cf jar-file input-file(s)

 

.jar files only execute through CMD

Every once in a while, my pc no longer recognizes a default app for jar files and I have to manually run them. I can open them with the command 'javaw.exe -jar' but they will not open otherwise. I have gone to Task Manager to check the path of the javaw.exe that runs when I successfully execute files using the command, however, when opening a .jar in File Explorer using the same javaw.exe, it does not execute. So, what I want to know is: What's going on, and how can I use File Explorer to run .jar files?