How to add Checkboxes to a JTree

I want to be able to add check boxes beside every node in my JTree. I think it would work if i customized my FileTreeCellRenderer class i just dont know where to start. here's my FileTreeCellRenderer class.

Code:

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<code>
class FileTreeCellRenderer extends DefaultTreeCellRenderer
  {
    private FileSystemView fileSystemView;
    private JLabel label;
    private JCheckBox check;
   
   

      FileTreeCellRenderer()
      {
        label=new JLabel();
        label.setOpaque(true);
        fileSystemView=FileSystemView.getFileSystemView();
      }
   
      public Component getTreeCellRendererComponent(JTree tree,Object value,boolean selected,boolean expanded,boolean leaf,int row,boolean hasFocus)
        {

          DefaultMutableTreeNode node=(DefaultMutableTreeNode)value;
         
          if(!"**".equals(node.toString()))
            {
                File file=(File)node.getUserObject();
                label.setIcon(fileSystemView.getSystemIcon(file));
                label.setText(fileSystemView.getSystemDisplayName(file));
               

              if (selected)
                {
                  label.setBackground(backgroundSelectionColor);
                }
              else
                {
                  label.setBackground(backgroundNonSelectionColor);
                }
            }
        return label;
      }

 
  }

</code>

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