private static final Color COLOR_CHART_BG = Color.WHITE;
private static final Color COLOR_CHART_LINE = Color.BLACK;
private static final Color COLOR_NODATA_TEXT = Color.GRAY;
private static final Color COLOR_CHART_BG = Color.WHITE;
private static final Color COLOR_CHART_LINE = Color.BLACK;
private static final Color COLOR_NODATA_TEXT = Color.GRAY;