code: public static String normalizeEntryPath(String entryPath) {
          if (entryPath == null || entryPath.isEmpty())
              return "";
  
          entryPath = entryPath.replace("\\", "/");
  
          if (entryPath.startsWith("/")) {
              if (entryPath.length() == 1) {
                  entryPath = "";
              } else {
                  entryPath = entryPath.substring(1, entryPath.length());
              }
          }
  
          return entryPath;
      }
docs: Normalize a relative entry path, so that it can be used in an archive.
  
  @param entryPath
  @return