Java 16-7 generic method and generic interface (generic class similar)

Write a Objecttool class

Generic method: Defines a generic type on a method
Format public < generic type > return type method name (generic type)
The benefits are:
This generic method can receive any type of data

1  Public class Objecttool {2publicvoid  show (T t) {3System.out.println (t ); 4 }5 }

Write a test class again

 1  public  class   Objecttooldemo { public  static  void   main (string[] args) { 3  objecttool ot =   Objecttool ();  4  ot.show ("Hello" );  5  ot.show (100 6  ot.show (true   7   8  }

Write a generic interface class first
Generic interface: Defines generics on an interface

1  Public Interface Inter<t> {2publicabstractvoid  show (T t); 3 }

Implementation class:

1 /* 2 Implementing a class when implementing an interface3 The first case: you already know what the type is.4 */5 //Public class Interimpl implements inter<string> {6 //7 //@Override8 //Public void Show (String t) {9 //System.out.println (t);Ten //    } One // } A  - //The second case: I don't know what type it is. -  Public classInterimpl<t>ImplementsInter<t> { the  - @Override -  Public voidShow (T t) { - System.out.println (t); + } - } +  A /*    

Test class

1  Public classInterdemo {2  Public Static voidMain (string[] args) {3 //test of the first case4 //inter<string> i = new Interimpl ();5 //i.show ("Hello");6 7 // //test of the second case8inter<string> i =NewInterimpl<string>();9I.show ("Hello");Ten  OneInter<integer> II =NewInterimpl<integer>(); AIi.show (100); - } -}

Java 16-7 generic method and generic interface (generic class similar)