java 实现的图形学的直线裁剪算法，运用窗口裁剪-java implementation of the graphics line clipping algorithm

java 实现的图形学的多边形扫描转换算法-java implementation of the graphics polygon scan conversion algorithm

采用Sutherland-Hodeman多边形裁剪算法和Cohen-Sutherland直线裁减算法在java界面实现(The implementation of the Sutherland-Hodeman polygon clipping algorithm and the Cohen-Sutherland line reduction algorithm in the java interface)