(原创)无限级可分类的分类表ADT的实现(3)

源码下载地址: http://www.javaall.com/resource/news.rar

树MenuTree的实现:

树由接点元素和子树的集合组成: 属性childs 里存放的也是树对象

package com.news.entity;
import java.util.*;
public class MenuTree {
   private NewsClass item ;
   ArrayList childs;
   public MenuTree(){
    item= new NewsClass();
    childs = new ArrayList();
   }
   public MenuTree(NewsClass newsClass){
    item = newsClass;
    childs = new ArrayList();
   }
   public void setItem(NewsClass item){
    this.item = item;
   }
   public NewsClass getItem(){
    return this.item ;
   }
 
   public ArrayList getChilds() {
 return childs;
   }
   public void setChilds(ArrayList childs) {
 this.childs = childs;
   }
    public void write(){
    String writeResult = "";
    for(int i=0; i<this.item.getDepth().intValue();i++){
     writeResult+="  ";
    }
    writeResult += this.getItem().className;
    writeResult += this.getItem().getOrderID().toString();
    System.out.println(writeResult);
    for(int i=0 ; i<this.childs.size() ; i++){
     MenuTree node = (MenuTree)this.childs.get(i);
     node.write();
    }
   }
}