java bug about ImageIo

package com.lingtu.model;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.util.Vector;

import javax.imageio.ImageIO;

//http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4826548

public class IconResp {
		  
	 
	public static String[] iconArray = new String[500];
	public static Vector   iconvec = new Vector(); 
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		new IconResp().getAllIcon();
	}
	
	public Vector getAllIcon(){
		if (iconvec.size()==0) {
			setIconVec();
		}
		for (int i = 0; i < iconvec.size(); i++) {
			System.out.println(iconvec.get(i).toString());
		}
		return iconvec;
	}
	
	public void resetIconResp(){
		iconvec.clear();
		setIconVec();
	}
	
	public String[] getAllIconOnly1Level(){
		if (iconArray[0]==null){
			setIconArrayOnly1Level();
		}
		for (int i = 0; i < iconArray.length; i++) {
			System.out.println(i+":"+iconArray[i]);
		}
		return iconArray;
	}
	
	public void setIconArrayOnly1Level(){
		File f = new File(Const.ICON_RESP_PATH);
		if (f.exists()&&f.isDirectory()) {
			for (int i = 0; i < f.listFiles().length; i++) {
				if (f.listFiles()[i].isFile()) {
					String lowerExtName = f.listFiles()[i].getName();
					lowerExtName=lowerExtName.substring(lowerExtName.length()-4, lowerExtName.length())
											 .toLowerCase();
					if(".jpg.gif.png".indexOf(lowerExtName)!=-1)
					iconArray[i] = f.listFiles()[i].getName() + "," + getWH(Const.ICON_RESP_PATH + File.separator +  f.listFiles()[i].getName());
				}
			}	
		}
	}
	
	public void setIconVec(){
		File f = new File(Const.ICON_RESP_PATH);
		if (f.exists()&&f.isDirectory()) {
			for (int i = 0; i < f.listFiles().length; i++) {
				if (f.listFiles()[i].isFile()) {
					String lowerExtName = f.listFiles()[i].getName();
					lowerExtName=lowerExtName.substring(lowerExtName.length()-4, lowerExtName.length())
											 .toLowerCase();
					if(Const.ICON_IMAGE_TYPE.indexOf(lowerExtName)!=-1)
						iconvec.add(Const.ICON_ROOT_NAME + "," + "," + f.listFiles()[i].getName() + "," + getWH(Const.ICON_RESP_PATH + File.separator +  f.listFiles()[i].getName()));
				}else if(f.listFiles()[i].isDirectory()){
					File f2 = f.listFiles()[i];
					for (int j = 0; j < f2.listFiles().length; j++) {
						if (f2.listFiles()[j].isFile()) {
							String lowerExtName = f2.listFiles()[j].getName();
							lowerExtName=lowerExtName.substring(lowerExtName.length()-4, lowerExtName.length())
													 .toLowerCase();
							if(Const.ICON_IMAGE_TYPE.indexOf(lowerExtName)!=-1)
							iconvec.add(f2.getName()+","+ f2.getName() + "," + f2.listFiles()[j].getName() + "," + getWH(Const.ICON_RESP_PATH + File.separator + f2.getName()+ File.separator + f2.listFiles()[j].getName()));
						}
					}	
				}
			}	
		}
	}
	
	//得到形如 "width,height" 的字符串
	public String getWH ( String strFileName){
		//System.out.println(strFileName);
		int iPicWidth = 0;
		int iPicHeight = 0;		
		try {				
			strFileName = strFileName.replaceAll("\\\\", "\\\\\\\\");
			File fPic = new File( strFileName);
			InputStream in = new FileInputStream(fPic);
			BufferedImage sourceImg = null;
	          if(in != null){
					try {
						sourceImg = ImageIO.read(in);
					} catch (Exception e) {
						// TODO: handle exception
						e.printStackTrace();
					}
		          if(sourceImg != null){
		        	  iPicWidth = sourceImg.getWidth();
		        	  iPicHeight = sourceImg.getHeight();
			          return iPicWidth + "," + iPicHeight;
		          }else{
		        	  System.out.println(strFileName+ "sourceImg is null!");  
		          }
	          }
		} catch (FileNotFoundException e) {
			System.out.println("文件不存在！" + strFileName);
		} catch (Exception e) {
			return "1,1";
		} 
		return "1,1";
	}
}