Hi Friend,

Try the following code:

import java.awt.*;
import org.jfree.ui.*;
import org.jfree.chart.*;
import org.jfree.chart.plot.*;
import org.jfree.data.xy.*;
import org.jfree.chart.axis.NumberAxis;

public class MultiLineChart extends ApplicationFrame {
public MultiLineChart(final String title) {
super(title);
final XYDataset dataset = createDataset();
final JFreeChart chart = createChart(dataset);
final ChartPanel chartPanel = new ChartPanel(chart);
chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
setContentPane(chartPanel);
}
private XYDataset createDataset() {
final XYSeries series1 = new XYSeries("Test");
series1.add(1.0, 60.0);
series1.add(2.0, 80.0);
series1.add(3.0, 35.0);
series1.add(4.0, 100.0);
series1.add(5.0, 95.0);
series1.add(6.0, 85.0);
series1.add(7.0, 70.0);
series1.add(8.0, 30.0);
series1.add(9.0, 45.0);
series1.add(10.0, 50.0);

final XYSeries series2 = new XYSeries("Max marks to pass the test");
series2.add(1.0, 40.0);
series2.add(2.0, 40.0);
series2.add(3.0, 40.0);
series2.add(4.0, 40.0);
series2.add(5.0, 40.0);
series2.add(6.0, 40.0);
series2.add(7.0, 40.0);
series2.add(8.0, 40.0);
series2.add(9.0, 40.0);
series2.add(10.0, 40.0);

final XYSeriesCollection dataset = new XYSeriesCollection();
dataset.addSeries(series1);
dataset.addSeries(series2);

return dataset;
}
private JFreeChart createChart(final XYDataset dataset) {
final JFreeChart chart = ChartFactory.createXYLineChart(
"Marks obtained by students in tests",
"Roll No of the students",
"Marks",
dataset,
PlotOrientation.VERTICAL,
true,
true,
false
);
chart.setBackgroundPaint(Color.white);
final XYPlot plot1 = chart.getXYPlot();
plot1.setBackgroundPaint(Color.lightGray);
plot1.setDomainGridlinePaint(Color.white);
plot1.setRangeGridlinePaint(Color.white);

final XYPlot plot2 = chart.getXYPlot();
plot2.setBackgroundPaint(Color.lightGray);
plot2.setDomainGridlinePaint(Color.white);
plot2.setRangeGridlinePaint(Color.white);

final XYPlot plot3 = chart.getXYPlot();
plot3.setBackgroundPaint(Color.lightGray);
plot3.setDomainGridlinePaint(Color.white);
plot3.setRangeGridlinePaint(Color.white);

return chart;
}
public static void main(final String[] args) {
final MultiLineChart demo = new MultiLineChart("Multi Line Chart");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);
}
}

Thanks