Android (Java) Learning Note 91: Overview and use of generic interfaces

1  Package cn.itcast_06; 2 3 /* 4 * Generic interface: Define generics on the interface 5  */ 6  Public Interface Inter<t> {7public     abstractvoid  show (T t); 8 }

1  Packagecn.itcast_06;2 3 //Implementing a class when implementing an interface4 //The first case: you already know what the type is.5 6 //Public class Interimpl implements inter<string> {7 //8 //@Override9 //Public void Show (String t) {Ten //System.out.println (t); One //    } A // } -  - //The second case: I don't know what type it is. the  Public classInterimpl<t>ImplementsInter<t> { -  - @Override -      Public voidShow (T t) { + System.out.println (t); -     } +}

1  Packagecn.itcast_06;2 3  Public classInterdemo {4      Public Static voidMain (string[] args) {5         //test of the first case6         //inter<string> i = new Interimpl ();7         //i.show ("Hello");8 9         // //test of the second caseTeninter<string> i =NewInterimpl<string>(); OneI.show ("Hello"); A  -Inter<integer> II =NewInterimpl<integer>(); -Ii.show (100); the     } -}

Android (Java) Learning Note 91: Overview and use of generic interfaces