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Thread: How to execute an executable JAR from within Java program?

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    Junior Member Hawke's Avatar
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    Default How to execute an executable JAR from within Java program?

    Don't know if this would belong in I/O, sorry if it doesn't.

    I have a game launcher program and I need it to launch my game after patching when I click on a button. I want to be able to execute this game (which is java based) within the program instead of using .bat files because I want a solution that works cross platform instead of having operating system specific commands.

    If there is no such method could you please list a method for Windows, Mac, and Linux so that I can use if statements and System.getProperty("os.name") to launch the jar that way?

    Thanks in Advance,
    Hawke


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    Default Re: How to execute an executable JAR from within Java program?

    I think ProcessBuilder (ProcessBuilder (Java Platform SE 6)) is what you want. I've never used it myself, so I can't tell you for sure how to use it. You can probably find some helpful information by googling about it.
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    Junior Member Hawke's Avatar
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    Default Re: How to execute an executable JAR from within Java program?

    Thanks this worked for me:

         ProcessBuilder pb = new ProcessBuilder("java", "-jar", jarname);
         pb.directory(new File(jarname).getParentFile());
     
         try{
     
    	pb.start();
     
         }catch(IOException ex){
     
    	ex.printStackTrace();
         }

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