一个Java的计算器程序。有最基本的运算个开方功能，而且设 计界面比较漂亮，代码容易看懂。-A Java-calculator program. There is a prescribing the most basic computing functions, and the design interface is beautiful, and the code easier to understand.

一个简单的java语言编写的三子棋程序，界面不是很漂亮，但是实现了三子棋的基本语法和功能。-A simple java language three-game program, the interface is not very pretty, but to achieve a three-game basic syntax and functionality.