JFreeChart如何使用OHLCSeries获取CandlestickChart的日期值

Question

我使用OHLCSeries生成JFreeChart CandlestickChart。我扩展了CandlestickRenderer。在CandlestickRenderer中，我覆盖＆＃34; public Paint getItemPaint（int series，int item）＆＃34;在其中，我需要每个斯托克的日期信息做一些事情，但我不知道得到它，请帮我解决。

部分代码如下：

       OHLCSeries ohlcSeries = new OHLCSeries("Price");
       for(Records record : recordslist ) {
           double h =...;
           ....
           LocalDate actionday = record.getRecordsDay ();
           int year = actionday.getYear();
           int month = actionday.getMonthValue();
           int day = actionday.getDayOfMonth();
           ohlcSeries.add(new Day(day,month,year), open, high, low, close);
       }
       OHLCSeriesCollection candlestickDataset.addSeries(ohlcSeries);
       JFreeChart candlestickChart = ChartFactory.createCandlestickChart("", "","", candlestickDataset, true);

       DateAxis  dayAxis = new DateAxis (); 
       candlestickChart.getXYPlot().setDomainAxis(dayAxis);

       class AnalysisCandlestickRenderer extends CandlestickRenderer {
            public Paint getItemPaint(int series, int item) {
                //here I need every stoke's date info , how can I get it?
            }
       }

Answer 1

根据此相关example中的建议，您可以使用传递给您的实施的OHLCSeriesCollection和series值访问数据集中的必填字段item您的自定义getItemPaint()中的CandlestickRenderer。从完整的example开始，以下渲染器将生成显示的数据值。

代码：

private final OHLCSeriesCollection seriesCollection = new OHLCSeriesCollection();
…
class AnalysisCandlestickRenderer extends CandlestickRenderer {

    @Override
    public Paint getItemPaint(int series, int item) {
        OHLCSeries currentSeries = seriesCollection.getSeries(series);
        System.out.println(series + ": " + currentSeries.getPeriod(item));
        return super.getItemPaint(item, item);
    }
}
…
CandlestickRenderer r = new AnalysisCandlestickRenderer();
chart.getXYPlot().setRenderer(r);

控制台：

1: Wed Jan 01 12:00:00 EST 2014
1: Wed Jan 01 12:01:00 EST 2014
1: Wed Jan 01 12:02:00 EST 2014
1: Wed Jan 01 12:03:00 EST 2014
1: Wed Jan 01 12:04:00 EST 2014
0: Wed Jan 01 12:00:00 EST 2014
0: Wed Jan 01 12:01:00 EST 2014
0: Wed Jan 01 12:02:00 EST 2014
0: Wed Jan 01 12:03:00 EST 2014
0: Wed Jan 01 12:04:00 EST 2014
0: Wed Jan 01 12:05:00 EST 2014
0: Wed Jan 01 12:06:00 EST 2014
0: Wed Jan 01 12:07:00 EST 2014
0: Wed Jan 01 12:08:00 EST 2014
0: Wed Jan 01 12:09:00 EST 2014

图表：