static public String nullify(String s)
    {
        if(s != null && s.length() == 0) s = null;
        return s;
    }
static public String nullify(String s)
    {
        if(s != null && s.length() == 0) s = null;
        return s;
    }
static public String nullify ( String s ) { if ( s != null && s . length ( ) == 0 ) s = null ; return s ; }
Convert a zero-length string to null

@param s the string to check for length
@return null if s.length() == 0, s otherwise
Convert a zero - length string to null