最病 Exampl e a The check at a diner Cook Customer Order Waitress (Receiver) (Client) ( Command) (Invoker) Ordero PlaceOrdero Cook Order nank You Institute of Computer Software 2021/215 Nanjing University
Example The "check" at a diner 2021/2/5 Institute of Computer Software Nanjing University 16
最病 Exampl e invoker configuration ApplIcation Menu Menuitem Command command Add(Document) Add( Menuitem) Clicked 9 Document command->Executed Open Close Cuto Copy e0 client command Institute of Computer Software 2021/215 Nanjing University
Example 2021/2/5 Institute of Computer Software Nanjing University 17 client invoker command configuration
最病 Exampl e Command Executed Document Closed document Cut( Paste Command Copy( Paste( Execute C I document->Paste( recelver Institute of Computer Software 2021/215 Nanjing University
Example 2021/2/5 Institute of Computer Software Nanjing University 18 receiver
最病 Exampl e Command Execute( Application Open command Add( Document) application Execute 9 AskUsero recelver name= AskUser( doc new Document(name) application->Add(doc) doc->Open Institute of Computer Software 2021/215 Nanjing University
Example 2021/2/5 Institute of Computer Software Nanjing University 19 receiver
最病 Exampl e Command Executed commands Macro Command Executed for all c in commands A 系列的命令 C->Execute Institute of Computer Software 2021/215 Nanjing University
Example 2021/2/5 Institute of Computer Software Nanjing University 20 一系列的命令