JFile Chooser throws errors before use, only sometimes?

Question

I create a JFile Chooser and use .setCurrentDirectory (); set the directory to the root folder of my java project by passing newFile ("."); This seems to work fine sometimes, but in other cases it causes an error. All this happens during program loading until any user enters, as far as I can tell, it is an accident if this happens or not. Here in the Chooser file the bits of my code are linked:

public class PnlHighScores extends JPanel {

    JFileChooser fcScores = new JFileChooser();

    PnlHighScores() {

        fcScores.addChoosableFileFilter(new TxtFilter());

        //***********This seems to cause a strange error only somethimes, Right as the program is run!***********
        fcScores.setCurrentDirectory(new File("."));//http://www.rgagnon.com/javadetails/java-0370.html
    }


    class ActFileChooser implements ActionListener {

        public void actionPerformed(ActionEvent e) {//http://download.oracle.com/javase/tutorial/uiswing/examples/components/FileChooserDemoProject/src/components/FileChooserDemo.java
            int returnVal = fcScores.showOpenDialog(PnlHighScores.this);

            if (returnVal == JFileChooser.APPROVE_OPTION) {
                filScores = fcScores.getSelectedFile();
                sFileLocation = filScores.getAbsolutePath();//.getParent();//http://www.java-forums.org/awt-swing/29485-how-retrieve-path-filechooser.html
                //System.out.println(filScores);
                pnlScoreText.updateScoreFile(sFileLocation);
            }

        }
    }
    class TxtFilter extends javax.swing.filechooser.FileFilter {//http://www.exampledepot.com/egs/javax.swing.filechooser/Filter.html

        public boolean accept(File file) {
            String filename = file.getName();
            if (file.isDirectory()) {
                return true;
            } else {
                return filename.endsWith(".txt");
            }
        }

        public String getDescription() {
            return "*.txt";
        }
    }
}

Exact error:

Exception in thread "main" java.lang.IndexOutOfBoundsException: Invalid index
        at javax.swing.DefaultRowSorter.convertRowIndexToModel(DefaultRowSorter.java:497)
        at sun.swing.FilePane$SortableListModel.getElementAt(FilePane.java:528)
        at javax.swing.plaf.basic.BasicListUI.updateLayoutState(BasicListUI.java:1343)
        at javax.swing.plaf.basic.BasicListUI.maybeUpdateLayoutState(BasicListUI.java:1294)
        at javax.swing.plaf.basic.BasicListUI.getCellBounds(BasicListUI.java:935)
        at javax.swing.JList.getCellBounds(JList.java:1600)
        at javax.swing.JList.ensureIndexIsVisible(JList.java:1116)
        at sun.swing.FilePane.ensureIndexIsVisible(FilePane.java:1540)
        at sun.swing.FilePane.doDirectoryChanged(FilePane.java:1466)
        at sun.swing.FilePane.propertyChange(FilePane.java:1513)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276)
        at java.awt.Component.firePropertyChange(Component.java:8128)
        at javax.swing.JFileChooser.setCurrentDirectory(JFileChooser.java:568)
        at Cannon.PnlSettings.<init>(PnlSettings.java:45)
        at Cannon.FraWindow.<init>(FraWindow.java:19)
        at Cannon.Main.main(Main.java:7)
Java Result: 1

The main class simply creates FraWindow, and FraWindow creates PnlSetting through its constructor method. They should be impartial, but the main thing is just in case:

package Cannon;

//Creates the frame
public class Main {

    public static void main(String[] args) {
        FraWindow fraMain = new FraWindow();
    }
}

Answer 1

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, , Thread Dispatch Thread. GUI SwingUtilities.invokeLater().

Swing Concurrency . , .