&& table.equals(objField.table) && (((alias == null) && (objField.alias == null)) || ((alias != null) && (alias.equals(objField.alias))));
&& table.equals(objField.table);
    public boolean equals(Object obj) {        if (obj instanceof Field) {            Field objField = (Field) obj;            return name.equals(objField.name)                && table.equals(objField.table)                && (((alias == null) && (objField.alias == null))                    || ((alias != null) && (alias.equals(objField.alias))));        }        return false;    }