JFileChooser visibility problem

Question

Hi,
I have a problem with JFileChooser-component. Every now and then the JFileChooser-component won't come visible and the application hangs.
For example:
import java.io.File;
import javax.swing.JFileChooser;
public class Main {
    public static void main(String args[])
         JFileChooser fcSaveAs = new JFileChooser();
         fcSaveAs.setSelectedFile(new File(fcSaveAs.getCurrentDirectory() + File.separator + "test.pdf"));
     int saveResp = fcSaveAs.showSaveDialog(null);
     if(saveResp == JFileChooser.APPROVE_OPTION) {
          System.out.println("true");
}So, I want to give the user a sample filename, which he/she can use to save a file.
But if I run that, every fifth or sixth time the dialog won't come visible and the application hangs. The user can't do anything but stop java.exe.
If i take that line 8 off, system works fine. But I want to give a sample filename to the user, which he/she can use to save the file.

Answer 1

Hi,
Have you tried running on the Event Dispatch Thread (as you always should with Swing code)?
import java.io.File;
import javax.swing.JFileChooser;
import javax.swing.SwingUtilities;
public class ChooserTest {
    public static void main(String[] args) {
     SwingUtilities.invokeLater(new Runnable() {
         @Override
         public void run() {
          JFileChooser fcSaveAs = new JFileChooser();
          fcSaveAs.setSelectedFile(new File(fcSaveAs
               .getCurrentDirectory()
               + File.separator + "test.pdf"));
          int saveResp = fcSaveAs.showSaveDialog(null);
          if (saveResp == JFileChooser.APPROVE_OPTION) {
              System.out.println("true");
}Piet