[JAVA] Composite Pattern

Call method recursively
Composite Pattern can represent a tree structure
(If it becomes a tree structure, you can consider Composite) </ font>

Design Pattarm MENU

Check with the following class structure

class	Explanation
interface face	Handle different objects with face type
sam.class	implement face
samList.class	implement face Hold List and call recursively
user(Main.class)	Check the operation

User Includes the meaning that other developers use this pattern

Below is the sample code

`interface_face`


interface face{void print();}

`sam.class`


class sam implements face{
      public void print(){
      System.out.println("."+this);
}}

`samList.class`


class samList implements face{
      List   list = new ArrayList();
      void   add(face fc){list.add(fc);}
      public void print(){
             Iterator it = list.iterator();
             while(it.hasNext()){
                   face fit = (face) it.next();
                   System.out.print("/"+fit);
                   fit.print(); //sam if fit is sam type.class print()Is called and this does not recurse
                                //print samList if fit is of type samList()Is called recursively
             }
      }
}

`user(Main.class)`


public static void main(String[] args){
  samList  sam1 = new samList();
  samList  sam2 = new samList();
  samList  sam3 = new samList();
  sam2.add(new  samList());
  sam2.add(new  sam());
  sam3.add(new  samList());
  sam3.add(new  sam());
  sam1.add(sam2);
  sam1.add(sam3);
  sam1.print();
}}