JavaFX - 如何对条形图中的值进行排序

Question

我有以下 JavaFX BarChart(NumberAxis 在底部，CategoryAxis 在左侧):

/image/jpiu1.png

如何反转(即按值排序)类别的顺序，以便 J 显示在顶部，A 显示在底部？

Answer 1

你可以这样做:

XYChart.Series series1 = new XYChart.Series();
series1.getData().add(new XYChart.Data(1, "A"));
series1.getData().add(new XYChart.Data(1, "B"));
series1.getData().add(new XYChart.Data(1, "C"));
series1.getData().add(new XYChart.Data(1, "D"));
series1.getData().add(new XYChart.Data(1, "E"));
series1.getData().add(new XYChart.Data(2, "F"));
series1.getData().add(new XYChart.Data(2, "G"));
series1.getData().add(new XYChart.Data(4, "H"));
series1.getData().add(new XYChart.Data(4, "J"));

Collections.sort(series1.getData(), new Comparator<XYChart.Data>() {

    @Override
    public int compare(Data o1, Data o2) {
        Number xValue1 = (Number) o1.getXValue();
        Number xValue2 = (Number) o2.getXValue();
        return new BigDecimal(xValue1.toString()).compareTo(new BigDecimal(xValue2.toString()));
    }
});