The green version was created using the command pattern.
refer to:
1. http://www.jb51.net/article/103595.htm
2. http://www.cnblogs.com/goldlone/p/7071715.html
The green version was created using the command pattern.
refer to:
1. http://www.jb51.net/article/103595.htm
2. http://www.cnblogs.com/goldlone/p/7071715.html