<<interface>>Video
+playVideo()
<<interface>>NetWork
+connect()
<<interface>>Photo
+takePhoto()
SmartPhone
-screenSize:double
+setScreenSize(double screenSize)
Phone
-brand:String-price:double
+call()+sendMessage();
CommonPhone
-keyboardType:String
+setKeyboardType(String type)
<<interface>>Game
+playGame()
<<interface>>Audio
+playAudio()
