final XYBarRenderer renderer = (XYBarRenderer) xyplot.getRenderer();
renderer.setUseYInterval(true);
renderer.setDrawBarOutline(true);
renderer.setBaseOutlinePaint(Color.black);
new PhaseChartColorer(process, phases) {
public void setItemColor(Object key, int pos, Color c) {
renderer.setSeriesPaint(pos, c);
}
}.run();