java 继承 多接口

#

  
    

   
     package edu.javase.buffer;


   
     interface
   
      faces {
 
   
     public
   
      
   
     void
   
      facefun1();

 
   
     public
   
      
   
     int
   
      facefun2();

 
   
     public
   
      String facefun3();
}


   
     interface
   
      faces2 {
 
   
     public
   
      
   
     void
   
      facefun11();

 
   
     public
   
      
   
     int
   
      facefun22();

 
   
     public
   
      String facefun33();
}


   
     class
   
      fatherz {
 
   
     public
   
      fatherz() {
 System.
   
     out
   
     .println(
   
     "
   
     fatherz 构造器
   
     "
   
     );
 }

 
   
     public
   
      fatherz(
   
     int
   
      i) {
 System.
   
     out
   
     .println(
   
     "
   
     fatherz int i 构造器
   
     "
   
      
   
     +
   
      i);
 }

 
   
     public
   
      
   
     void
   
      fatherfun() {
 System.
   
     out
   
     .println(
   
     "
   
     fatherfun
   
     "
   
     );
 }

}


   
     class
   
      demoface extends fatherz implements faces, faces2 {
   
     //
   
      一旦集成必须实现所有接口
   
     

   
      
   
     public
   
      demoface() {
 super();
 System.
   
     out
   
     .println(
   
     "
   
     demoface 构造器
   
     "
   
     );
 }

 
   
     public
   
      demoface(
   
     int
   
      i) {
 super(
   
     1
   
     );
 System.
   
     out
   
     .println(
   
     "
   
     demoface int i 构造器
   
     "
   
      
   
     +
   
      i);
 }

 @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
   
     ;
 }

 @Override
 
   
     public
   
      
   
     void
   
      facefun11() {
 System.
   
     out
   
     .println(
   
     "
   
     实现接口 facefun11
   
     "
   
     );
 }

 @Override
 
   
     public
   
      
   
     int
   
      facefun22() {
 System.
   
     out
   
     .println(
   
     "
   
     实现接口 facefun22
   
     "
   
     );
 
   
     return
   
      
   
     0
   
     ;
 }

 @Override
 
   
     public
   
      String facefun33() {
 System.
   
     out
   
     .println(
   
     "
   
     实现接口 facefun33
   
     "
   
     );
 
   
     return
   
      
   
     null
   
     ;
 }
}


   
     public
   
      
   
     class
   
      demointerface {
 
   
     public
   
      
   
     static
   
      
   
     void
   
      main(String[] args) {
 demoface dd 
   
     =
   
      
   
     new
   
      demoface();
 dd.facefun1();
   
     //
   
      调用接口，并且实现
   
     

   
      dd.facefun2();
 dd.facefun3();

 dd.facefun11();
 dd.facefun22();
 dd.facefun33();
 System.
   
     out
   
     .println(
   
     "
   
     ----------------
   
     "
   
     );

 demoface ff 
   
     =
   
      
   
     new
   
      demoface(
   
     5
   
     );
 ff.fatherfun(); 
   
     //
   
      同事继承father
   
     

   
      }
}
  
    

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