JFileChooser hanging problem

Question

I am developing an application in which I use JFileChooser. It was working for a while and then (after a recent new application instal) it started to hang every time it attempted to execute the line
JFileChooser fc = new JFileChooser();
I tried creating a trivial new application, tried stepping into the library code and tried re-installing NetBeans 4.1 - all with no success.
Can you suggest what else I might try?

Answer 1

Thanks for the suggestion. I had not tried printing before and after so I tried it as follows:
I put the following lines:
System.out.println("starting new call");
JFileChooser fc = new JFileChooser();
System.out.println("ended new call");
iand I got the following when I ran it:
nit:
deps-jar:
compile:
run:
starting new call
I then had to interrupt the process because it hung and I got:
Java Result: 1073807364
I had already tried it with the debugger and stepped into the code invoked by the call to new JFileChooser(). It eventually reached the Toolkit function getDefaultToolkit and never successfully returned from there. It repeatedly executed the test
if (toolkit == null)
as false and went straight to the final line
return toolkit;
Stepping on or trying to step out of that function simply returned execution to the function's opening line:
if (toolkit == null)
This appears to loop.
I had a problem with Star Office not long before this problem surfaced. It reported that it had failed to save a file as I closed the application. Since it is Java based (and I am ignorant of whether there could be interference) I wonder whether that could have resulted in an overwrite of something in NetBeans. That was why I tried a re-instal - but with no beneficial effect.