Fille chooser problem - URGENT

Question

I want to create a simple JFileChooserdialog. I pass a parent object as a parameter. The problem is that the window opens only at the FIRST TIME. After that it is never dispalyed and no excepions are thrown.
What's interesting, the parent value I pass to the JFileChooser is not null, but inside showOpenDialog() method it is null. What's going on?
Here is my snipper of code:
Component comp = (Component) myFrame;
JFileChooser fc = new JFileChooser();
int returnVal = fc.showOpenDialog(comp);
if (returnVal == JFileChooser.APPROVE_OPTION)
     keyPath = fc.getSelectedFile().getAbsolutePath();
fc = null;
Do you have any ideas?

Answer 1

Well, i try to put it simpler.
I kave a class in which I want to show a vary simple opendialog. My code looks like that:
Component comp = (Component) aFrame();
JFileChooser fc = new JFileChooser();
int returnVal = fc.showOpenDialog(comp);
if (returnVal == JFileChooser.APPROVE_OPTION) {
     keyPath = fc.getSelectedFile().getAbsolutePath();
The problem is, that this doesn't work: the dialog is never opened when i use java 1.4 and opened only the first time when i use java 1.5 (after the first time the jfilechooser doesn't appear).
I tried to debug the code and the comp object IS NOT NULL. But when I go step into the showOpenDialog() method in class JFileChooser, it turns out that parent parameter (that is my comp object) has null value. It means that value of comp frame is somewhere lost.
It wouldn't be big tragedy to me, if the openDialog opened. But it is not, it does not appear at all and no exception is thrown (i checked it with try catch). It's quite strange, because JFileChooser api says that I can simply invoke the openDialog with null parameter.
I hope you now understand better my problem.