一个简单的Java画图程序，能画直线、椭圆和矩形，单击鼠标既可操作。-a simple Java drawing, and painting can be straight, oval and rectangle, click of the mouse can operate.

采用C++ 和OpenCV库设计画图窗口，RBG颜色可使用滚动条调整颜色。可用于电脑画图保存。(C++ and OpenCV libraries are used to design drawing Windows, and RBG colors can be used to adjust colors with scrollbars. It can be used for computer drawing.)