code: public static boolean isJavaIdentifier( String s )
      {
          if (!Character.isJavaIdentifierStart( s.codePointAt( 0 ) )) return false;
  
          for (int i = 1; i < s.length(); i++)
          {
              if (!Character.isJavaIdentifierPart( s.codePointAt( i ) )) return false;
          }
          return true;
      }
docs: <p>isJavaIdentifier.</p>
  
  @param s a {@link java.lang.String} object.
  @return a boolean.