Forcing events to happen

Question

Hello,
I created a JFileChooser (meCreateChooser) which shows up when the user clicks on a JMenuItem. The user has to type a name for his file and the program checks to see if that name already exists.
If the typed file name already exists, the program must produce a JOptionPane and prompt the user to type a different name.
     private void myCreateChooserActionPerformed(ActionEvent e) {
          if(e.getActionCommand().equals(JFileChooser.APPROVE_SELECTION)) {
                  // Check if the dictionary name is valid (if it already exists
               // or not)
               // true = validation pass, false = validation failure
               if(true) {
                                 do some things
               else {
                    // Inform the user that the dictionary name he typed already exists).
                    int response;
                    response = JOptionPane.showConfirmDialog(null, "This file name already exists! Type another.", "File Already Exists", JOptionPane.DEFAULT_OPTION, JOptionPane.INFORMATION_MESSAGE);
                                // My problem is here. How can I force my JFileChooser to show up again?
                    // Force myCreateChooser Listener to listen!!
                    myCreateChooser.showOpenDialog(this); // this is working but
                    // it causes unwanted exceptions!
     }Thank you

Answer 1

You don't have to force any events. You can just wrap the behavior in a do-while loop, and see whether the resulting file already exists. If it does, repeat. If not, you're done with the loop.
Something like this should work:
          File f;
          do{
               int jfcResponse = myCreateChooser.showOpenDialog(this);
               if(jfcResponse != JFileChooser.APPROVE_OPTION)//If the user clicks cancel or anything else like that, exit from method
                    return;
               f = myCreateChooser.getSelectedFile();
               if(f.exists())//if the file chooser's file already exists, show the dialog
                    JOptionPane.showConfirmDialog(null, "This file name already exists! Type another.", "File Already Exists", JOptionPane.DEFAULT_OPTION, JOptionPane.INFORMATION_MESSAGE);
          while(f.exists());//repeat until the user inputs a filename of a non-existing file