code: protected void openFileChooser()
     {
        if (m_model.getShowDialog())
        {
           if (m_fileChooser.showOpenDialog(m_parent) == JFileChooser.APPROVE_OPTION)
           {
              m_model.setFile(m_fileChooser.getSelectedFile());
           }
           m_model.setShowDialog(false);
        }
     }
docs: Command to open the file chooser.