TreeViewの追加方法について教えて下さい�A

<?xml version="1.0" encoding="Shift_JIS" ?>



<db name="ZAIKOTBL">

	<node name="■ネジ"     id="0" pid="" />

	<node name="▼１０ｍｍ" id="1" pid="0" />

	<node name="▼１５ｍｍ" id="2" pid="0" />

	<node name="▼２０ｍｍ" id="3" pid="0" />

	<node name="■逆ネジ"   id="4" pid="0" />

	<node name="▼１０ｍｍ" id="5" pid="4" />

	<node name="▼１５ｍｍ" id="6" pid="4" />

	<node name="▼２０ｍｍ" id="7" pid="4" />

	<node name="■ナット"   id="8" pid=""  />

	<node name="■ワッシャ" id="9" pid=""  />

	<node name="■リベット" id="10" pid="" />

</db>

/*

 * 作成日: 2008/10/06

 */

package jp.co.test;



import org.xml.sax.*;

import javax.xml.parsers.*;

import java.io.*;

import java.util.*;



import org.xml.sax.helpers.DefaultHandler;



public class MyDataSet extends DefaultHandler {



	Map map = new HashMap();

	private String currentDbName;

	MyDataRowCollection mrc;



	public MyDataSet(String xmlFile) throws IOException, SAXException, ParserConfigurationException  {

		SAXParserFactory sax = SAXParserFactory.newInstance();

		SAXParser parser = sax.newSAXParser();

		parser.parse(new File(xmlFile), this);

	}

	

	public void startElement(String url, String localName, String qName, Attributes attr) {

		if (qName.equals("db")) {

			currentDbName = attr.getValue("name");

			mrc = new MyDataRowCollection();

			map.put(currentDbName, mrc);

		}

		if (qName.equals("node")) {

			mrc.addRow(new MyDataRow(

					attr.getValue("name"), 

					attr.getValue("id"), 

					attr.getValue("pid")));

		}

	}

	

	public MyDataRowCollection getDataSet(String dbName) {

		return (MyDataRowCollection)map.get(dbName);

	}

	

	public static void main(String[] args) {

		

		try {

			MyDataSet m = new MyDataSet("TEST.xml");



			MyDataRowCollection mrc = m.getDataSet("ZAIKOTBL");

			

			Iterator it = mrc.listIterator();

			while (it.hasNext()) {

				MyDataRow mr = (MyDataRow)it.next();

				System.out.println(mr);

			}

		}

		catch (Exception we) {

			we.printStackTrace();

		}

	}

}

/*

 */

package jp.co.test;



import java.util.*;

/**

 */

public class MyDataRowCollection {

	List list = new ArrayList();

	

	public void addRow(MyDataRow row) {

		list.add(row);

	}

	

	public MyDataRow getRow(int index) {

		return (MyDataRow)list.get(index);

	}

	

	public MyDataRow[] getPids(String pid) { //same pid コレクション

		List ls = new ArrayList();

		for (int i=0;i < list.size();i++) {

			MyDataRow r = getRow(i);

			if (r.getPid().equals(pid)) ls.add(r);

		}

		return (MyDataRow[])ls.toArray(new MyDataRow[ls.size()]);

	}

	

	public Iterator listIterator() {

		return list.iterator();

	}

	

}

/*

 * 作成日: 2008/10/06

 */

package jp.co.test;



/**

 */

public class MyDataRow {



	private String id;

	private String pid;

	private String name;

	public MyDataRow(String name, String id, String pid) {

		setId(id);

		setPid(pid);

		setName(name);

	}

	public String getId() {

		return id;

	}

	public void setId(String id) {

		this.id = id;

	}

	public String getName() {

		return name;

	}

	public void setName(String name) {

		this.name = name;

	}

	public String getPid() {

		return pid;

	}

	public void setPid(String pid) {

		this.pid = pid;

	}

	public String toString() {

		StringBuffer sb = new StringBuffer();



		sb.append("<node name='").append(name).append("' id='");

		sb.append(id).append("' pid='").append(pid).append("' />");



		return sb.toString();

	}

}

/*

 * 作成日: 2008/10/06

 */

package jp.co.test;



import java.util.*;



public class TreeView {



	

	public class TreeNode {

		String name;

		List childNodes = new ArrayList(); //of TreeNode



		public String getName() {

			return this.name;

		}

		public TreeNode(String name) {

			this.name = name;

		}

		public void add(TreeNode node) {

			childNodes.add(node);

		}

		public boolean hasChild() {

			return childNodes.size() > 0;

		}

		public int count() {

			return childNodes.size();

		}

		public Iterator listIterator() {

			return childNodes.iterator();

		}

	}



	public static void main(String[] args) {



		TreeView tv = new TreeView();

		

		TreeNode root = tv.new TreeNode("■在庫管理■");

		

		tv.createTree(root, "");

		

		tv.showTreeView(root, 0);

		

	}

	

	public void createTree(TreeNode root, String pid) {

		

		try {

			MyDataSet m = new MyDataSet("TEST.xml");



			MyDataRowCollection mrc = m.getDataSet("ZAIKOTBL");



			MyDataRow[] rows = mrc.getPids(pid);



			for (int i=0;i < rows.length;i++) {

				MyDataRow row = rows[i];

				

				TreeNode node = new TreeNode(row.getName());

				

				createTree(node, row.getId());

				

				root.add(node);

				

			}

			

		}

		catch (Exception we) {

			we.printStackTrace();

		}

	}



	public void showTreeView(TreeNode root, int indent) {

		Iterator it = root.listIterator();

		showTreeNode(root, indent++);

		while (it.hasNext()) {

			TreeNode tr = (TreeNode)it.next();

			showTreeView(tr, indent);

		}

	}

	

	public void showTreeNode(TreeNode node, int indent) {

		indent = indent * 2;

		String indents = "                                        ";

		

		System.out.println(

				indents.substring(indents.length() - indent) + 

				node.getName()

		);

		

	}

}