Java design Pattern _ combined mode

/** *  */package com.wangbiao.design.composite;import java.util.arraylist;import  java.util.List;/** *  @Title: component.java *  @Package   com.wangbiao.design.composite *  @Description: todo  *  @author  wangbiao     *  @date  2014-9-28  Morning 9:50:26  *  @version  v1.0 * /public abstract class component {    string name =  Null;        public component (String name)  {         this.name = name;    }         public abstract void add (Component component);     public abstract void remove (component component);     public abstract void display ();} Class reaf extends component{        public reaf (String  name)  {        super (name);    }      @Override     public void add (component component)  {         // not applicable for Reaf         system.out.println ("Not applicable for reaf");     }     @Override     public void remove (Component  component)  {        // not applicable for  reaf        system.out.println ("Not applicable for  reaf ");    }     @Override     public  Void display () &NBSP;{&NBSp;       system.out.println ("reaf: " + name);     }}class Composite extends Component{    private List< Component> list = new arraylist<component> ();         public composite (String name)  {         Super (name);    }     @Override     public void  add (component component)  {        list.add (Component);     }     @Override     public void remove (component component)  {        list.remove (Component);     }     @Override     public void display ()  {        for  (component component : list)  {             if (Component instanceof composite) {                 system.out.println (" xxxxxxxxxxxxxxcompositexxxxxxxxxxxxxx :  "+component.name);             }else{                 system.out.println ("xxxxxxxxxxxxxxreafxxxxxxxxxxxxxx : " +component.name);             }             component.display ();         }             }    }/** *   */package com.wangbiao.design.composite;/** *  @Title: client.java *  @Package   com.wangbiao.design.composite *  @Description: todo  *  @author  wangbiao     *  @date  2014-9-28  Morning 10:04:16  *  @version  V1.0  */public class client {    /**     *  @param  args     */    public static void main ( String[] args)  {                 component component_one = new composite ("compositexxxxxxxx");         component_one.add (New reaf ("Reaf_one"));         component_one.add (New reaf ("Reaf_two"));                &nBsp Component component_two = new composite ("Xxxxxxxxcomposite");         component_two.add (New reaf ("Reaf_three"));         component_two.add (New reaf ("Reaf_four"));                 component_one.add (Component_two);                 component_one.display ();     }        /*     * result     xxxxxxxxxxxxxxreafxxxxxxxxxxxxxx : reaf_one    reaf:  reaf_one    xxxxxxxxxxxxxxReafxxxxxxxxxxxxxx : reaf_two     Reaf: reaf_two    xxxxxxxxxxxxxxCompositexxxxxxxxxxxxxx :  Xxxxxxxxcomposite    xxxxxxxxxxxxxxreafxxxxxxxxxxxxxx : reaf_three    reaf: reaf_three     xxxxxxxxxxxxxxreafxxxxxxxxxxxxxx : reaf_four    reaf: reaf_four     */}

Java design Pattern _ combined mode