简单的运算,能帮助初学者更好的学习，是不错的东西，是java的代码-Simple arithmetic, can help beginners learn better, is a good thing, is the java code

简单的计算器Java代码，实现了加减乘除等基本功能，简易计算器的图形界面-A simple calculator Java code that implements the basic functions such as addition and subtraction multiplication and division, simple graphical interface