miniCAD-java GUI实现的小型CAD软件，界面其实模仿了windows画图的风格，实现了画线、画圆、画矩形、画文字载入图片，并能改变图形的颜色和大小。-In this project, you should use Java GUI to implement a simple drawing board. To get full marks, you should implement to: 1.draw line, circle, rectangle, text 2.c