Windows 10: I Can't Open Jar files

Discus and support I Can't Open Jar files in Windows 10 Network and Sharing to solve the problem; Hey, I can't open Jar files or more exactly Optifine files, instead of running the install Optifine launcher it opens Jar files with internet explorer... Discussion in 'Windows 10 Network and Sharing' started by Xamentle, Apr 19, 2021.

  1. Xamentle Win User

    I Can't Open Jar files


    Hey, I can't open Jar files or more exactly Optifine files, instead of running the install Optifine launcher it opens Jar files with internet explorer of all thing, I have tried to reset default apps, but I still can't get it to work, I want to be able to open Jar files in the way they are supposed to be opened, otherwise I can't download Optifine and other Jar file related stuff. I see this as a flaw, it's not supposed to function like this, and I also have tried to right click on the Optifine file and select "Open with". but nothing there works like it does when you haven't selected a default app at all, because that's the main thing I by accident selected explorer as my default opening alternative, when I tried to open the Jar file for the first time.

    :)
     
    Xamentle, Apr 19, 2021
    #1
  2. DaveM121 Win User

    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!
     
    DaveM121, Apr 19, 2021
    #2
  3. .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.
     
    Vinodh_Kumar V, Apr 19, 2021
    #3
  4. NateHoopu Win User

    I Can't Open Jar files

    .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.
     
    NateHoopu, Apr 19, 2021
    #4
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I Can't Open Jar files

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