Decorative Mode of design pattern

Decoration mode

Dynamically adds some additional responsibilities to an object, and the decoration mode is more flexible than generating subclasses for added functionality

Person class:

 Package Com.hml.decorator;  Public class Person {    private  String name;      Public String GetName () {        return  name;    }      Public void setName (String name) {        this. Name = name;    }       Public void Show () {    }}

Clothing category

 package   Com.hml.decorator;  public  class  Finery extends   person { protected   person component;  public  void   decorate (person component) {  component;  public  void   Show () { if  (Component! = null  ) {Component.show (); }    }}

T sleeve type

 Package Com.hml.decorator;  Public class extends Finery {    publicvoid  Show () {        System.out.println ("T-sleeve");}    }

Large underwear Category:

 Package Com.hml.decorator;  Public class extends Finery {    publicvoid  Show () {        System.out.println ("big underwear");}    }

Next, we can create an object, then decorate it with T-sleeves and decorate it with a large underwear.

Class Diagram:

Features of decoration mode

Decorating mode is a way to add more functionality to an existing feature dynamically, removing the decorative function from the class, which simplifies the original class.

Decorative Mode of design pattern