这篇文章是关于Java编写的基于智能卡的应用程序。本教程将帮助初学者理解概念和Java智能卡和主机应用程序之间的通信。我所看到的Java智能卡技术的初学者问简单的问题，所以我决定为他们提供一个完整的例子，让他们开始。在这篇文章/教程中，我将解释一个示例应用程序，一个计算器，将进行四则运算的计算，即，+， - ，*，/。,This article is about writing Java Smart card based applications. This tutorial will help beginners to understand the concepts and communication between a Java Smart Card and a host application. I have seen beginners of Java Smart Card technology ask simple questions, so I decided to provide them with a complete example to get them started. In this article/tutorial I will explain a sample application, a Calculator which will perform four basic operations of calculations, i.e,,+ ,-,* and /.