jpeg images not loading correctly

i am not getting the preview of downloaded jpeg image. how can i make it work? the code follows.....

code
------
import java.io.*;
import java.net.URL;
import java.net.URLConnection;



class  Test1
{
public void download (URL url) throws IOException
{
URLConnection conn = url.openConnection();
conn.connect();
int length = conn.getContentLength();
int needed = length;
InputStream is = conn.getInputStream();
System.out.println("hello");
System.out.println("is.available = "+is.available());
InputStreamReader reader = new InputStreamReader (is);

int buflength = 0;
byte[] buf = new byte[length];

buflength += is.read(buf, buflength, length-buflength);
/*while (buflength!=length)
{
System.out.println("is.available = "+is.available());
buflength+=is.read(buf);
//buflength+=reader.read(buf);
System.out.println("read "+buflength+" out of "+length+" bytes");
} */

FileOutputStream fw = new FileOutputStream("c:\\abc\\trial.jpg");


fw.write(buf);
fw.flush();
fw.close();
}
}

class Test
{
public static void main(String args[])
{
        try
                  {
              URL h = new URL("http://search.cpan.org/src/LGODDARD/Image-ThousandWords-0.08/rose.jpg");    // load this image
              Test1 T = new Test1();
              T.download(h);
              }catch (java.net.MalformedURLException e ) {System.out.println(e);}
                 catch (java.io.IOException e) {e.printStackTrace();}
            
}
}