Listing the files in a directory of the current JAR file

Question

I am making a game in JAVA where I want to come up with a list of files in a certain directory in my jar so I can make sure to have a list of those classes to be used in the

Answer 1

Remember that JAR files are just ZIP files renamed, and it's very easy to read the contents of ZIP files in Java:

    File jarName = null;
    try
    {
        jarName = new File (Dir.class.getProtectionDomain().getCodeSource().getLocation().toURI());
    }
    catch (Exception e)
    {
        e.printStackTrace();    
    }

    try 
    {
      ZipFile zf=new ZipFile(jarName.getAbsoluteFile());
      Enumeration e=zf.entries();
      while (e.hasMoreElements()) 
      {
          ZipEntry ze=(ZipEntry)e.nextElement();
          System.out.println(ze.getName());
      }
      zf.close();
   } catch (IOException e) 
   {
      e.printStackTrace();
   }