用java实现GUI界面的计算器程序，用户可以通过鼠标依次输入参加计算的数值，进行加、减、乘、除混合运算。里面包含课程设计文档及源代码。-GUI interface to achieve with java calculator program, users can turn the mouse input to participate in the value calculation, add, subtract, multiply and divide mixed operation. Wh