一个用java编写的简单画板程序，实现画板的基本功能-a simple painting panel coding with java

JAVA程序，实现一个简单的画板，可选择图形的类型、颜色。拖动鼠标进行画图。-JAVA program, a simple drawing board, and can choose the type of graphics, color. Drag the mouse for drawing.

能够实现画板程序的简单和扩展功能，能够很好的展示java画板的功能-Sketchpad program simple and extended capabilities to display java drawing board functions

本程序实现的是用于画图的编辑器。作为最基本的功能，本软件可以完成图形文件打开、编辑、保存以及一些简单的图形绘制的操作。(This program implements an editor for drawing. As the most basic function, this software can complete the operation of graphics files to be opened, edited, sav