Real time line plot demo

LinePlotDemo.java

import java.awt.*;

import javax.swing.JFrame;
import javax.swing.JPanel;

import smile.plot.*;

/**
 *
 * @author Haifeng Li
 */
@SuppressWarnings("serial")
public class LinePlotDemo extends JPanel {
   PlotCanvas canvas;

   public LinePlotDemo() {
      super(new GridLayout(1,2));

      double[][] data = getData2D(0);
      canvas = LinePlot.plot("Line 1", data, Line.Style.DASH, Color.RED);
      canvas.setTitle("2D Lines");
      add(canvas);
   }

   @Override
   public String toString() {
      return "Line Plot";
   }

   public double[][] getData2D(int i) {
      double[][] data = new double[100][2];
      for (int j = 0; j < data.length; j++) {
         data[j][0] = 2 * Math.PI * (double) j / data.length;
         data[j][1] = Math.sin(data[j][0] + i*Math.PI/100);
      }
      return data;
   }

   public void update2D() {
      for (int i = 1; i < 1000; i++) {
         try {
            Thread.sleep(25);
            double[][] data = getData2D(i);
            canvas.clear();
            canvas.line("Line 1", data, Line.Style.DASH, Color.RED);
         }
         catch (InterruptedException e) {
            e.printStackTrace();
         }
      }
   }

   public static void main(String[] args) {
      LinePlotDemo linePlot = new LinePlotDemo();

      JFrame frame = new JFrame("Line Plot");
      frame.setMinimumSize(new Dimension(1000, 500));
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.setLocationRelativeTo(null);
      frame.getContentPane().add(linePlot);
      frame.setVisible(true);

      linePlot.update2D();
   }
}