Java Decorator example

Decorator

 MyInterface
       |
_______|_______
|             | 
Myclass     Decorator
          ____|_____
          |        | 
  DecoratorA      DecoratorB
  
  
  class Myclass implements MyInterface {
    
    public void print(){
       System.out.println("hello");
      }
    }
  
  class DecoratorA implements Decorator{
   MyInterface myObject;
   DecoratorA(myInterface myObject){
     this.myObject = myObject; 
   }
   public void print(){
         myObject.print();
         System.out.print("world!");
   }
}

class DecoratorB implements Decorator{
    MyInterface myObject;
    DecoratorB(myInterface myObject){
     this.myObject = myObject; 
    }
    public void print(){
         System.out.print("my");
         myObject.print();
    }
}

public static void main(Strings[] arg){
  MyInterface a =new DecoratorA(new DecoratorB(new MyClass());
  a.print();
}


http://aixiangct.blog.163.com/blog/static/91522461201011363751978/