Windows 10: Cannot set Java to open .jar files by default

Discus and support Cannot set Java to open .jar files by default in Windows 10 Network and Sharing to solve the problem; I have Windows 10 Home, on an HP Pavilion.Anyway, today I downloaded a .jar file, and whenever I double-clicked on it, it would not open automatically.... Discussion in 'Windows 10 Network and Sharing' started by NicholasMcVicker, Apr 26, 2021.

  1. Cannot set Java to open .jar files by default


    I have Windows 10 Home, on an HP Pavilion.Anyway, today I downloaded a .jar file, and whenever I double-clicked on it, it would not open automatically. When right clicking on the .jar file and selecting "open with", "JavaTM Platform SE binary" would not show up. Yes, I have Java installed correctly on my computer. To make matters worse, I accidentally set .jar files to open automatically with Internet Explorer. Is there a way for me to find a Java folder on my computer that I could use to open this .jar file?Obviously, I want to fix this problem so that I can open .jar files with Java,

    :)
     
    NicholasMcVicker, Apr 26, 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 26, 2021
    #2
  3. Cannot set Java to open .jar files by default

    I have Windows 10 Home, on an HP Pavilion.

    Anyway, today I downloaded a .jar file, and whenever I double-clicked on it, it would not open automatically. When right clicking on the .jar file and selecting "open with", "Java(TM) Platform SE binary" would not show up. Yes, I have Java installed
    correctly on my computer. To make matters worse, I accidentally set .jar files to open automatically with Internet Explorer. Is there a way for me to find a Java folder on my computer that I could use to open this .jar file?

    Obviously, I want to fix this problem so that I can open .jar files with Java, and Java only. The simplest and easiest solutions/help are greatly appreciated! Cannot set Java to open .jar files by default :)

    ***Post moved by the moderator to the appropriate forum category.***
     
    Alexandra Nofi, Apr 26, 2021
    #3
  4. WildOne Win User

    Cannot set Java to open .jar files by default

    Windows 10 reassociate .jar files to java


    See if this will help:
    go to settings, System, default apps, choose default app by file type....see if you can set .jar file....
     
    WildOne, Apr 26, 2021
    #4
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Cannot set Java to open .jar files by default

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