有人能帮我了解如何在JFreeChart的x-y图中设置柱形宽度吗?非常感谢。
final XYSeries series = new XYSeries("Analysis");
series.add(22.0,33.1);
series.add(32.0,33.1);
series.add(42.0,33.1);
final XYSeriesCollection dataset = new XYSeriesCollection(series);
return dataset;