Http cache don't work as expected in an applet

Question

Hi, everyone!
I write an applet which dynamic connect a http server and fetch content from it. I wish the content could be cached in browser's cache system.
Here is my code, it's work well in MS JVM, but when I turn to sun plugin, the cache system don't work. Every time I get a Response code 200 ( wish to be 304)
==================My code================================
URLConnection conn=(URLConnection)url.openConnection();
conn.setUseCaches(true);
conn.setAllowUserInteraction(false);
conn.connect();
java.io.ObjectInputStream ois=null;
Object o=null;
try
ois=new ObjectInputStream
(new java.util.zip.InflaterInputStream(conn.getInputStream()));
return ois.readObject();
finally
if(ois != null)
ois.close();
==================My code================================
I tested on sun JDK 1.42 and IE6.
My Http Server is Jetty ,and I do have add a last_modified tag in http response.
I look into the Java plugin control panel ,only the jar file is cached.

Answer 1

Sorry for the confusion, of course you are right and it seems to be a bug.
I ment that the method name setUseCaches itself might be confusing because it does not force caching, it just allows it when available.
There are several bugs about the plugin caching (4912903, 5109018, 6253678, 4845728, ...) even if they might not fit 100% to your problem they show that plugin caching is an issue which sun really should improve.
You might have a look at them and vote for them or submit a new bug.