计算器，采用java可视化组件，可以计算基本的加减乘除等运算-Calculator, using java visual components, we can calculate the basic operations such as addition and subtraction multiplication and division

java 可视化编程，实现计算器的基本功能，包括加减乘除等，对于学习Java图形界面有一定作用(Java visual programming, to achieve the basic functions of calculators, including addition, subtraction, multiplication and division, etc., has a certain effect on learning Java graphical interface.)