当我试图从intellij上的db获取电子邮件时，它总是显示电子邮件是这样的：com.mysql.cj.jdbc.result。resultsetimpl@4c89299. 我怎么能修好它。
这就是密码。
数据库处理程序：

public ResultSet getAllmessages(String reciever) throws SQLException, ClassNotFoundException {
    String query = "SELECT * FROM " + Const.MESSAGES_TABLE + " WHERE " + Const.MESSAGES_RECIEVER + "=?";
    PreparedStatement preparedStatement = getDbConnection().prepareStatement(query);
    preparedStatement.setString(1, reciever);
    ResultSet resultSet = preparedStatement.executeQuery();
    return resultSet;
}

我的电子邮件地址：

DBHandler databasehandler = new DBHandler();
ResultSet maild = databasehandler.getAllmessages(databasehandler.getMail(indexController.userId).toString().trim());
ResultSet resultSet =  databasehandler.getAllmessages((maild).toString().trim())