JFreeChart Dynamic Data Demo Chart Example
Chapter:
JFreeChart
Last Updated:
08-07-2016 09:17:05 UTC
Program:
/* ............... START ............... */
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JPanel;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.XYPlot;
import org.jfree.data.time.Millisecond;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.xy.XYDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
public class JavaJFreeChartDynmicDataDemo extends ApplicationFrame implements ActionListener {
/** The time series data. */
private TimeSeries series;
private double lastValue = 100.0;
public JavaJFreeChartDynmicDataDemo(final String title) {
super(title);
this.series = new TimeSeries("Random Data", Millisecond.class);
final TimeSeriesCollection dataset = new TimeSeriesCollection(this.series);
final JFreeChart chart = createChart(dataset);
final ChartPanel chartPanel = new ChartPanel(chart);
final JButton button = new JButton("Add New Data Item");
button.setActionCommand("ADD_DATA");
button.addActionListener(this);
final JPanel content = new JPanel(new BorderLayout());
content.add(chartPanel);
content.add(button, BorderLayout.SOUTH);
chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
setContentPane(content);
}
private JFreeChart createChart(final XYDataset dataset) {
final JFreeChart result = ChartFactory.
createTimeSeriesChart("Dynamic Data Demo", "Time", "Value", dataset,
true, true, false);
final XYPlot plot = result.getXYPlot();
ValueAxis axis = plot.getDomainAxis();
axis.setAutoRange(true);
axis.setFixedAutoRange(60000.0); // 60 seconds
axis = plot.getRangeAxis();
axis.setRange(0.0, 200.0);
return result;
}
public void actionPerformed(final ActionEvent e) {
if (e.getActionCommand().equals("ADD_DATA")) {
final double factor = 0.90 + 0.2 * Math.random();
this.lastValue = this.lastValue * factor;
final Millisecond now = new Millisecond();
System.out.println("Now = " + now.toString());
this.series.add(new Millisecond(), this.lastValue);
}
}
public static void main(final String[] args) {
final JavaJFreeChartDynmicDataDemo demo = new
JavaJFreeChartDynmicDataDemo("Dynamic Data Demo");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);
}
}
/* ............... END ............... */
Output
Now = Fri Jul 08 14:34:55 IST 2016
Now = Fri Jul 08 14:35:06 IST 2016
Now = Fri Jul 08 14:35:07 IST 2016
Now = Fri Jul 08 14:35:07 IST 2016
Now = Fri Jul 08 14:35:07 IST 2016
Now = Fri Jul 08 14:35:08 IST 2016
Now = Fri Jul 08 14:35:08 IST 2016
Now = Fri Jul 08 14:35:08 IST 2016
Now = Fri Jul 08 14:35:08 IST 2016
Now = Fri Jul 08 14:35:09 IST 2016
Now = Fri Jul 08 14:35:09 IST 2016
Now = Fri Jul 08 14:35:09 IST 2016
Tags
JFreeChart Dynamic Data Demo, Java, JFreeChart