jdeveloper implements,该如何处理

jdeveloperimplements我在jdeveloper里新建servlet是里面都是extends,比如这种:public class CustomerDaoI

jdeveloper implements
我在jdeveloper里新建servlet是里面都是extends,比如这种:public class CustomerDaoImpl extends HttpServlet {。但是我现在需要新建一个implements的。.请问步骤是什么?

[解决办法]
public class CustomerDaoImpl extends HttpServlet implements XXX{
}