code: public static boolean isClass(String name)
    {
      if(name == null) {
        return false;
      }
      Matcher matcher = CLASS_NAME_PATTERN.matcher(name);
      return matcher.find();
    }
docs: Test if given name is a valid Java class name. This predicate returns false if name to test is null.
  
  @param name name to test, possible null.
  @return true if given name is a valid Java class name.