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JFreechart Exception Exception

I am trying to build a histogram using timeseries by entering the beginning and end date, but I have a problem with the end date, which it indicates: Exception in the "main" thread org.jfree.data.general.SeriesException: you are trying to add an observation for the time period of May 4, 2011, but the series already contains observation for this period of time. Duplicates are not allowed. Try using the method addOrUpdate().

final TimeSeries series2 = new TimeSeries("ip max", Day.class);

String datebegin = "04/29/2011 02:00:01";
String dateend = "05/04/2011 02:00:01";
DateFormat formatter;
Date date;
formatter = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
date = formatter.parse(datebegin);
Calendar cal1 = Calendar.getInstance();
cal1.setTime(date);
Date date2;
date2 = (Date) formatter.parse(dateend);
Calendar cal2 = Calendar.getInstance();
cal2.setTime(date2);
while (((cal1.compareTo(cal2)) != 0))  {
    cal1.add(Calendar.HOUR, 24);
    String intermediatestringdate = formatter.format(cal1.getTime());
    System.out.println( intermediatestringdate);
    Date intermediatedate = (Date) formatter.parse(dateend);
    series2.add(new Day(intermediatedate),500);
}
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3 answers

Assuming that you are creating a timeline using ChartFactory.createXYBarChart()c IntervalXYDataset, simply create a domain TimeSerieswith a suitable one TimePeriod.

private static IntervalXYDataset createDataset() {
    TimeSeries series = new TimeSeries("Series");
    RegularTimePeriod day = new Day(29, 4, 2011);
    RegularTimePeriod end = new Day(4, 5, 2011);
    int i = 1;
    while (day.compareTo(end) < 1) {
        series.addOrUpdate(day, i++);
        day = day.next();
    }
    TimeSeriesCollection dataset = new TimeSeriesCollection();
    dataset.addSeries(series);
    return dataset;
}

Also note that it is Day.classno longer required TimeSeries.

+6

TimeSeries TimeSeriesCollection TimePeriodValues ​​ TimePeriodValuesCollection, .

, , :

    TimePeriodValues data = new TimePeriodValues("duration"); 
    for(int x=0; x<_stats.getDataPoints().size();x++)
    {
        DataPoint dp = _stats.getDataPoints().get(x); 
        data.add(new Millisecond(dp._date),dp._duration); 
    }
    TimePeriodValuesCollection dataset = new TimePeriodValuesCollection(); 

    dataset.addSeries(data); 
    JFreeChart chart = ChartFactory.createScatterPlot("Title", "start time", "duration (millis)", dataset, PlotOrientation.VERTICAL, true, true, false);
    XYPlot plot = chart.getXYPlot();
    plot.setDomainAxis(new DateAxis()); 
    DateAxis domainAxis = (DateAxis)plot.getDomainAxis(); 
    domainAxis.setDateFormatOverride(new SimpleDateFormat("yyyy/MM/dd HH:mm:ss.SSS")); 
    ChartUtilities.saveChartAsPNG(new File(_reportFolder+File.separator+uuid+".png"), chart, 500, 300);
+1

I believe this is the main cause of the problem. When adding a time / value list to TimeSeries, the added time must be unique from the entire list.
series2.add (new day (interim), 500);

Otherwise, use addOrUpdate if there is time in the list.
series2.addOrUpdate (new day (interim), 500);

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