In this basic tutorial, I will teach you how to create a simple timeseries chart in Java using the free JFreeChart. The program uses the following two jar files, and they come with the JFreeChart itself. You can download JFreeChart at their official website www.jfreechart.org
- jcommon-1.0.15.jar
- jfreechart-1.0.12.jar
The program also demonstrates how easily you can save a generated chart to your computer using the Charts Utilities from JFreeChart
package com.kushal.utilities;
import java.io.File;
import java.io.IOException;
import java.util.Date;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.data.time.Day;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
public class TimeSeriesChartDemo {
public void createTimeSeriesXYChart()
{
TimeSeries series = new TimeSeries( "", Day.class );
series.add(new Day(new Date("2009/01/01")), 123);
series.add(new Day(new Date("2009/01/02")), 133);
series.add(new Day(new Date("2009/01/03")), 99);
series.add(new Day(new Date("2009/01/04")), 113);
series.add(new Day(new Date("2009/01/05")), 159);
series.add(new Day(new Date("2009/01/06")), 124);
series.add(new Day(new Date("2009/01/07")), 120);
TimeSeriesCollection dataset=new TimeSeriesCollection();
dataset.addSeries(series);
JFreeChart chart = ChartFactory.createTimeSeriesChart
("User Participation Chart", // Title
"Day", // X-Axis label
"Number Of Users", // Y-Axis label
dataset, // Dataset
true, // Show legend
true, //tooltips
false //url
);
saveChart(chart);
}
public void saveChart(JFreeChart chart)
{
String fileName="C:/Users/kushal/Desktop/myTimeSeriesChart.jpg";
try {
/**
* This utility saves the JFreeChart as a JPEG
* First Parameter: FileName
* Second Parameter: Chart To Save
* Third Parameter: Height Of Picture
* Fourth Parameter: Width Of Picture
*/
ChartUtilities.saveChartAsJPEG(new File(fileName), chart, 800, 600);
} catch (IOException e) {
e.printStackTrace();
System.err.println("Problem occurred creating chart.");
}
}
public static void main(String args [])
{
new TimeSeriesChartDemo().createTimeSeriesXYChart();
}
}
The following is the output of this program
