Windows 10: Jar File not Opening

So I have installed Minecraft Java 1.16.4 on my Windows 10 and I have tried to install Optifine 1.16.4 on it and I got it where the icon is the jar teacup with the smoke and every time I try to install it it says there was an error in the following sequence that has a sequence that goes C:/word/word/word?etc. then at the end of the command it has the file name.


At the bottom of the error pop-up it says to check to make sure the command is correct then try again.


Every time I look it up it says to use this command thing java -jar filename.jar something like that but I don't know how to do that.


I really want to get this to work and I have browsed the internet for a while now and this is my last hope, someone please help me!

:)

 

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!

 

.jar files opening in internet explorer

Hi Robert,

Welcome to Microsoft Community.

I understand that .jar files opens in Internet Explorer by default and downloads again on Windows 10. I will certainly help you.

I suggest you to follow the below steps and check if it resolves the issue.

1. Right click on the .jar file, select Open with
and click on Choose another app.

2. Select the app you want to open the .jar file from list.

3. If required, highlight the app and check the option
Always use this app to open, click OK.

Hope this helps. If the issue remains unresolved, please get back to us and we would be happy to help.

 

.jar files opening in internet explorer

I have the same problem, I accidentaly switched a .jar file to open with internet explorer, or notepad, I can't remember, and I forgot to unselect set it to the default, and now I can't get back to the java thing, please help.