How to use

org.jfree.chart.renderer.xy.GradientXYBarPainter

constructor

this.tickLabelPaint = Color.darkGray;
this.barPainter = new GradientBarPainter();
this.xyBarPainter = new GradientXYBarPainter();
this.shadowVisible = true;
this.shadowPaint = Color.gray;

this.tickLabelPaint = Color.DARK_GRAY;
this.barPainter = new GradientBarPainter();
this.xyBarPainter = new GradientXYBarPainter();
this.shadowVisible = false;
this.shadowPaint = Color.GRAY;

/**
 * Sets the current chart theme.  This will be applied to all new charts
 * created via methods in this class.
 *
 * @param theme  the theme (<code>null</code> not permitted).
 *
 * @see #getChartTheme()
 * @see ChartUtilities#applyCurrentTheme(JFreeChart)
 *
 * @since 1.0.11
 */
public static void setChartTheme(ChartTheme theme) {
  if (theme == null) {
    throw new IllegalArgumentException("Null 'theme' argument.");
  }
  currentTheme = theme;
  // here we do a check to see if the user is installing the "Legacy"
  // theme, and reset the bar painters in that case...
  if (theme instanceof StandardChartTheme) {
    StandardChartTheme sct = (StandardChartTheme) theme;
    if (sct.getName().equals("Legacy")) {
      BarRenderer.setDefaultBarPainter(new StandardBarPainter());
      XYBarRenderer.setDefaultBarPainter(new StandardXYBarPainter());
    }
    else {
      BarRenderer.setDefaultBarPainter(new GradientBarPainter());
      XYBarRenderer.setDefaultBarPainter(new GradientXYBarPainter());
    }
  }
}

/**
 * Sets the current chart theme.  This will be applied to all new charts
 * created via methods in this class.
 *
 * @param theme  the theme ({@code null} not permitted).
 *
 * @see #getChartTheme()
 * @see ChartUtils#applyCurrentTheme(JFreeChart)
 *
 * @since 1.0.11
 */
public static void setChartTheme(ChartTheme theme) {
  Args.nullNotPermitted(theme, "theme");
  currentTheme = theme;
  // here we do a check to see if the user is installing the "Legacy"
  // theme, and reset the bar painters in that case...
  if (theme instanceof StandardChartTheme) {
    StandardChartTheme sct = (StandardChartTheme) theme;
    if (sct.getName().equals("Legacy")) {
      BarRenderer.setDefaultBarPainter(new StandardBarPainter());
      XYBarRenderer.setDefaultBarPainter(new StandardXYBarPainter());
    }
    else {
      BarRenderer.setDefaultBarPainter(new GradientBarPainter());
      XYBarRenderer.setDefaultBarPainter(new GradientXYBarPainter());
    }
  }
}