Updating components in jpanel

Question

Hi, all
I have a report application which will update me system utilization in several jpanel. Those panels stored in a hashtable and I programmed it refresh each 5 minutes. Here is how I do it.
Step 1: remove all
mypanel=(JPanel)panels.get("1");
mypanel.removeAll();
mypanel.validate();
Step 2: show progress
mypanel.add(<updating message in jlabel>);
mypanel.add(<a progressbar>);
mypanel.validate();
Step 3: add new content
mypanel.removeAll();
mypanel.add(<a graph in jlabel>);
mypanel.add(<a jtable with data>);
The problem is the old content still remains when progress bar appeared. Didn't I just remove all components in step 1? How can I have a empty panel with only progress bar?
Thanks,
Vincent Chen

Answer 1

Damn, I found what the problem is, but if I gave the solution to the OP, that would mean confessing I have followed the link, and admitting to belong to the "not worth mentioning" category!Well, since my cover's blown anyway, let's caugh it up:
Your have an attrubute searchType of type SearchType, you initialize it to reference a new SeearchType() , and you use its status for the search, however you never add the instance in the panel's widget hierarchy. Instead you add a new SearchType() .
Same for attribute style :
searchType = new SearchType();
style = new Style();
this.add(new SearchType(), c);
this.add(new Style(), c);
// in event handler
search(txfQuery.getText(),searchType.getSelected(),style.caseSensitive(),limitation.getLimNum());
                                ^
                                *At this point, the instance referenced by searchType has never been displayed, so the checkbox, combobox, and whatnot that the user has interacted with are not the ones whose state you read.