Java Learning Note-design pattern 8 (Adorner mode)

Intention

Add some extra responsibilities to an object dynamically. For added functionality, the decorator mode is more flexible than generating subclasses.

The source class is a decorated class, and the decorator class is a decorative class that can dynamically add some functionality to the source class.

Public interface Sourceable {public void method ();

public class Source implements sourceable{@Overridepublic void method () {System.out.println ("This is original method!");  }}

public class Decorator implements Sourceable{private source Source;public Decorator (source source) {super (); This.source = Source;} @Overridepublic void Method () {System.out.println ("before decorator!"); Source.method (); System.out.println ("after decorator!");}}

　　

Transferred from: http://blog.csdn.net/zhangerqing/article/details/8239539

　

Java Learning Note-design pattern 8 (Adorner mode)