public static boolean isBlankValue(String s){
  if (null == s)   return true;
  String _s=s.trim();
  return ((EMPTY_STRING.equals(_s)) || (STRING_ZERO.equals(_s)));
}

public static boolean isBlankValue ( String s ) { if ( null == s ) return true ; String _s = s . trim ( ) ; return ( ( EMPTY_STRING . equals ( _s ) ) || ( STRING_ZERO . equals ( _s ) ) ) ; }
returns true if null or trims to an empty string .
