计算器作为一种计算工具使用率非常高。本文利用Java 语言的Swing、动作事件处理机制等技术开发了一个 计算器，对于学习Java程序设计具有很大帮助，尤其对于《Java程序设计》课程的教学具有重要的指导作用。

As a computational tool, calculator is used widely. This paper designs a calculator based on Swing and Action event handling mechanism. It is helpful to learn Java programming, and especially has guiding role for Java Programming.