hello, I am new java developer,
i try to use the example "Request a list of albums"(http://
code.google.com/intl/zh-TW/apis/picasaweb/
developers_guide_java.html#Albums) , and return error in Message
[  Invalid value for attribute : 'null'  ].

But I try another example such as "List photos in album"  (http://
code.google.com/intl/zh-TW/apis/picasaweb/
developers_guide_java.html#ListPhotos)  , can return the photo list.

if you know why? please tell me , thank you!



my test code
-----------------------------------------------------------------------------

import java.net.URL;
import java.util.Properties;

import com.google.gdata.client.photos.PicasawebService;
import com.google.gdata.data.photos.AlbumEntry;
import com.google.gdata.data.photos.UserFeed;


public class picasaTest {

        public static void main(String[] args) {

                try{
                     PicasawebService myService = new PicasawebService("example
Picasa");
                     myService.setUserCredentials("[email protected]",
"MyPassword");
                     URL feedUrl = new 
URL("http://picasaweb.google.com/data/feed/
api/user/chiachunchuang?kind=album");

                     UserFeed myUserFeed = myService.getFeed(feedUrl,
UserFeed.class);--->       error in this line

                     for (AlbumEntry myAlbum : myUserFeed.getAlbumEntries()) {
                             
System.out.println(myAlbum.getTitle().getPlainText());
                     }
                  }

                catch(Exception ex){
                        System.err.println("Expection:"+ex.getMessage());
                        }
        }

}
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