code: public static String getAppVersion() {
          if (appVersion != null)
              return appVersion;
  
          String appName = getAppId();
          if ("mdw".equalsIgnoreCase(appName)) {
              appVersion = getMdwVersion();
          }
          else {
              appVersion = "Unknown";
              try {
                  InputStream stream = ApplicationContext.class.getClassLoader().getResourceAsStream(BUILD_VERSION_FILE);
                  if (stream != null) {
                      appVersion = "";
                      int i;
                      while ((i = stream.read()) != -1) {
                          appVersion += (char) i;
                      }
                      stream.close();
                  }
              }
              catch (Exception ex) {
                  logger.severeException(ex.getMessage(), ex);
              }
          }
  
          return appVersion;
      }
docs: Returns the application version read from the build version file