Changing the line size of a JFreeChart chart

ChangingLineSize.java

private JFreeChart createChart(XYDataset dataset, ICarteira car) {
    // create the chart...
    final JFreeChart chart = ChartFactory.createTimeSeriesChart(
    car.getNome(), // title
    "Tempo", // x axis label
    "Valor", // y axis label
    dataset, // data
    true, // include legend
    true, // tooltips
    true // urls
  );
  
  XYPlot plot = chart.getXYPlot();
  // here we change the line size
  int seriesCount = plot.getSeriesCount();
  for (int i = 0; i < seriesCount; i++) {
    plot.getRenderer().setSeriesStroke(i, new BasicStroke(2));
  }
  
  // line size changed
  return chart;
 }