private JPanel makePreviewPanel(){
  JPanel previewPanel=new JPanel();
  previewPanel.setLayout(new BoxLayout(previewPanel,BoxLayout.Y_AXIS));
  previewPanel.add(_previewLabel);
  _preview=new JPanel();
  JScrollPane js=new JScrollPane(_preview);
  previewPanel.add(js);
  return previewPanel;
}

private JPanel makePreviewPanel ( ) { JPanel previewPanel = new JPanel ( ) ; previewPanel . setLayout ( new BoxLayout ( previewPanel , BoxLayout . Y_AXIS ) ) ; previewPanel . add ( _previewLabel ) ; _preview = new JPanel ( ) ; JScrollPane js = new JScrollPane ( _preview ) ; previewPanel . add ( js ) ; return previewPanel ; }
setup a display pane for a tree that shows only directory nodes ( no file leaves ) the leaves ( icon images ) will be displayed in this panel .
