I am trying to create an example graph for a different project. The issue is that I am getting the error: Exception in thread “AWT-EventQueue-0” java.lang.RuntimeException: Uncompilable code regarding this line: dataset.addSeries(series); in this code:
public class Graphs extends javax.swing.JFrame {

/**
 * Creates new form Graphs
 */
public Graphs() {
initComponents();
XYSeries series = new XYSeries("Weight Progress");
int zeropoint = 0;

for(int i = 0; i < 5; i++) {
    series.add(i, i);
    zeropoint = i;
}

XYSeriesCollection dataset = new XYSeriesCollection();
dataset.addSeries(series);

JFreeChart chart = ChartFactory.createXYLineChart("Name", "Week", "Time", dataset);
ChartPanel chartPanel = new ChartPanel(chart);
chartPanel.setSize(500, 500);
jPanel1.add(chartPanel); // Add chartPanel to jPanel1
jPanel1.revalidate();
jPanel1.repaint();

}

This code takes place in a JForm in Netbeans IDE.

I manipulated the values used to initialize the series, but it did not work.