Design Patterns and America - structural - Decorator Pattern (XX)

What is the decorator pattern

Carried out without disrupting the business logic of the enhanced decorative multilayer decorative support, and proxy mode decorator like to focus on strengthening, focusing control agent

 

Java IO

Class Diagram

 

use

// the FileInputStream file stream is read into class for 
the InputStream in = new new the FileInputStream ( "/ User / wangzheng / test.txt" );
 // is a class with a cache read data support function implemented in decorating cache increases with 
        the InputStream bin = new new BufferedInputStream (in);
         byte [] = Data new new  byte [128 ];
         the while (! bin.read (Data) = -1 ) {
         // ... 
        }