JTreeで条件に一致するノードを検索しハイライト

class HighlightTreeCellRenderer extends DefaultTreeCellRenderer {
  private static final Color rollOverRowColor = new Color(220, 240, 255);
  private final TreeCellRenderer renderer;
  public String q;
  public HighlightTreeCellRenderer(TreeCellRenderer renderer) {
    this.renderer = renderer;
  }

  @Override public Component getTreeCellRendererComponent(JTree tree, Object value,
        boolean isSelected, boolean expanded,
        boolean leaf, int row, boolean hasFocus) {
    JComponent c = (JComponent) renderer.getTreeCellRendererComponent(
        tree, value, isSelected, expanded, leaf, row, hasFocus);
    if (isSelected) {
      c.setOpaque(false);
      c.setForeground(getTextSelectionColor());
      // c.setBackground(Color.BLUE); // getBackgroundSelectionColor());
    } else {
      c.setOpaque(true);
      if (q != null && !q.isEmpty() && value.toString().startsWith(q)) {
        c.setForeground(getTextNonSelectionColor());
        c.setBackground(rollOverRowColor);
      } else {
        c.setForeground(getTextNonSelectionColor());
        c.setBackground(getBackgroundNonSelectionColor());
      }
    }
    return c;
  }
}