java - 更改 JFreeChart 背景颜色的困难

Question

我正在尝试更改条形图的背景颜色，但到目前为止似乎没有任何效果

下面是我的代码:

JFreeChart expbarchart = ChartFactory.createBarChart("Monthly Expenditures", "Expenditure Type", "Amount (£)", barexp, PlotOrientation.VERTICAL, false, true, false);
    ChartPanel expframe = new ChartPanel(expbarchart);
    expframe.setLocation(695, 49);
    expframe.setSize(641,500);
    expframe.setBorder(new EtchedBorder(EtchedBorder.LOWERED, new Color(173, 216, 230), null));
    graphpanel.add(expframe);

我尝试过.setbackground()，但它似乎不起作用

谢谢

Answer 1

BarChartDemo1向您展示如何设置图表背景颜色:

chart.setBackgroundPaint(new Color(173, 216, 230));

它还向您展示了如何设置可以更改的ChartTheme:

StandardChartTheme theme = new StandardChartTheme("JFree/Shadow", true);
Color color = new Color(173, 216, 230);
theme.setPlotBackgroundPaint(color);
theme.setChartBackgroundPaint(color.brighter());
ChartFactory.setChartTheme(theme);