private float getLineHeight(Graphics g) {
    if (myLineHeight >= 0) {
      return myLineHeight;
    }
    FontRenderContext fontRenderContext = ((Graphics2D) g).getFontRenderContext();
    LineMetrics lineMetrics = myPlainFont.getLineMetrics(DEFAULT_MEASURE_HEIGHT_TEXT, fontRenderContext);
    myLineHeight = lineMetrics.getHeight();
    return myLineHeight;
  }
private float getLineHeight(Graphics g)