We have three applet test cases as below. In applet,
1. Call and call "getClass().getResource(...)" only. Everytime we always get back a 200 for this. This is fine because we have not download any contents.

2. Call and call "getClass().getResourceAsStream(...)" only. The first time we get back a 200. Then we get back a 304 which is correct behaviour because the resource has been downloaded and cached and not yet updated on server side.

3. Call "URL url = getClass().getResource(...)" followed by a call "url.openConnection().getInputStream(); # and then read from the InputStream".
- The first time we got back TWO 200s - one for getResoruce(), the other for the real downloading with InputStream.
- The second time we got back a 200 followed by a 304 - one for get getResource() again, the other for the real downloading with InputStream - and this time we do not download anything because the contents has been cached.

We could probably try to avoid extra ping from Applet.getClass().getResource(), espically for case #3.