在 JFreeChart 中更新 PieChart

Question

我使用 JFreeChart 创建了一个 PieChart。我终其一生都不知道如何在创建图表后对其进行更新。是创建全新图表的唯一方法吗？

Answer 1

如图here, you can alter a chart after it's been rendered. In this case, update the chart's data model, PieDataset, and the listening view will follow; in these related examples, a component's Action updates a Dataset. In a MultiplePiePlot, you can update the appearance of the pie chart view directly, as shown here.

附录：从PieChartDemo1开始，重构数据集并添加合适的Action，如下所示。

private static final DefaultPieDataset dataset = createDataset();
…
public PieChartDemo1(String title) {
    super(title);
    add(createDemoPanel());
    add(new JButton(new AbstractAction("Update") {
        
        @Override
        public void actionPerformed(ActionEvent e) {
            dataset.setValue("Apple", dataset.getValue("Apple").doubleValue() + 1);
        }
    }), BorderLayout.SOUTH);
}

在 JFreeChart 中更新 PieChart

Update PieChart in JFreeChart

java

swing

jfreechart