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Код

private void drawChart(){
   
    int PeriodIndex=cmbPeriod.getSelectedIndex();
    String item=getSelectedItem();
    if (PeriodIndex!=-1 && item.length()!=0){
        Object[] coll = data.getHistory(getSelectedItem(),PeriodIndex);
        String[] TempStatistics = (String[])coll[0];
        TimeSeriesCollection globalHistory = (TimeSeriesCollection)coll[1];
        LoadChart(drawPainChart(globalHistory,PeriodIndex));
    } 
    else {ErrorMessage("Please, select the patient and the period for the chart");}
}

 private JFreeChart drawPainChart(TimeSeriesCollection hSeriesCollection, int k) {
        
        TimeSeriesCollection hDataset = new TimeSeriesCollection();
        TimeSeries tempSeries = hSeriesCollection.getSeries(k);
        hDataset.addSeries(tempSeries);
        
        DateAxis timeAxis = new DateAxis("Time");
        timeAxis.configure();
        
        NumberAxis painAxis = new NumberAxis("Level");
        hAxis.setTickUnit(new NumberTickUnit(1));
        hAxis.setRange(-0.5, 10.5);
        
        XYBarRenderer barRenderer = new XYBarRenderer();
        
        XYLineAndShapeRenderer lineRenderer = new XYLineAndShapeRenderer();
        lineRenderer.setShapesVisible(false);
        
        XYDotRenderer dotRenderer = new XYDotRenderer();
        dotRenderer.setDotHeight(6);
        dotRenderer.setDotWidth(6);
        
        XYPlot hPlot = new XYPlot();
        hPlot.setDataset(0, hDataset);
        hPlot.setDataset(1, hDataset);
        hPlot.setDomainAxis(timeAxis);
        hPlot.setRangeAxis(hAxis);
        hPlot.setRenderer(0, lineRenderer);
        hPlot.setRenderer(1, dotRenderer);
        
        LegendItemCollection emptyLegend = new LegendItemCollection();
        hPlot.setFixedLegendItems(emptyLegend);
        
        JFreeChart hChart = new JFreeChart(hPlot);
        return hChart;
    } 

private void LoadChart(JFreeChart chart){
      
        ChartPanel panel = new ChartPanel(null); 
        panel.setChart(chart);
        jPanelChart.setLayout(new BorderLayout()); 
        jPanelChart.add(panel, BorderLayout.CENTER);
  }