java 接口

#

  
    

   
     package edu.javase.buffer;


   
     interface
   
      faces {
 
   
     public
   
      
   
     void
   
      facefun1();

 
   
     public
   
      
   
     int
   
      facefun2();

 
   
     public
   
      String facefun3();
}


   
     class
   
      demoface implements faces {

 @Override
 
   
     public
   
      
   
     void
   
      facefun1() {
 System.
   
     out
   
     .println(
   
     "
   
     实现接口 facefun1
   
     "
   
     );
 }

 @Override
 
   
     public
   
      
   
     int
   
      facefun2() {
 System.
   
     out
   
     .println(
   
     "
   
     实现接口 facefun2
   
     "
   
     );
 
   
     return
   
      
   
     0
   
     ;
 }

 @Override
 
   
     public
   
      String facefun3() {
 System.
   
     out
   
     .println(
   
     "
   
     实现接口 facefun3
   
     "
   
     );
 
   
     return
   
      
   
     null
   
     ;
 }
}


   
     public
   
      
   
     class
   
      demointerface {
 
   
     public
   
      
   
     static
   
      
   
     void
   
      main(String[] args) {
 demoface dd 
   
     =
   
      
   
     new
   
      demoface();
 dd.facefun1();
 dd.facefun2();
 dd.facefun3();
 }
}
  
    

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