code: public Manifest getManifest()
      throws IOException
    {
      Manifest manifest;
  
      JarFile jarFile = getJarFile();
  
      try {
        if (jarFile == null)
          manifest = null;
        else
          manifest = jarFile.getManifest();
      } finally {
        closeJarFile(jarFile);
      }
  
      return manifest;
    }
docs: Returns Manifest