// LineChart Example
// No extra modules defined.
// Source code file LineChart.java
// Create a line chart using JFreeChart library.
//
// JAR files jcommon-1.0.23.jar and jfreechart-1.0.19.jar
// must be added to project.

import java.io.*;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.ChartUtilities;
public class LineChart {
    public static void main(String[] args) {
        try {

            // Define data for line chart.
            DefaultCategoryDataset lineChartDataset =
                    new DefaultCategoryDataset();
            lineChartDataset.addValue(15, "schools", "1970");
            lineChartDataset.addValue(30, "schools", "1980");
            lineChartDataset.addValue(60, "schools", "1990");
            lineChartDataset.addValue(120, "schools", "2000");
            lineChartDataset.addValue(240, "schools", "2010");

            // Define JFreeChart object that creates line chart.
            JFreeChart lineChartObject = ChartFactory.createLineChart(
                    "Schools Vs Years", "Year", "Schools Count", lineChartDataset,
                    PlotOrientation.VERTICAL,
                    true,   // Include legend.
                    true,   // Include tooltips.
                    false); // Don't include URLs.

            // Write line chart to a file.
            int imageWidth = 640;
            int imageHeight = 480;
            File lineChart = new File("line-chart.png");
            ChartUtilities.saveChartAsPNG(
                    lineChart, lineChartObject, imageWidth, imageHeight);
        }

        catch (Exception i)
        {
            System.out.println(i);
        }
    }
}