spminiproject.lab2.chart.Histogram2.java Source code

Introduction

Here is the source code for spminiproject.lab2.chart.Histogram2.java

Source

package spminiproject.lab2.chart;

import java.io.File;
import java.io.IOException;
import javax.swing.JPanel;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYBarRenderer;
import org.jfree.data.statistics.HistogramDataset;
import org.jfree.data.xy.IntervalXYDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author Ronald j del Rosario
 */
public class Histogram2 extends ApplicationFrame {
    public Histogram2(String title, double vector[], int intervals, String labelx, String labely) {
        super(title);
        JPanel chartPanel = createPanel(title, vector, intervals, labelx, labely);
        chartPanel.setPreferredSize(new java.awt.Dimension(500, 475));
        setContentPane(chartPanel);
    }

    private static IntervalXYDataset createDataset(String title, double vector[], int intervals) {
        HistogramDataset dataset = new HistogramDataset();
        //        double vector [] = {70, 36, 43, 69, 82, 48, 34, 62, 35, 15,
        //            59, 139, 46, 37, 42, 30, 55, 56, 36, 82,
        //            38, 89, 54, 25, 35, 24, 22, 9, 55, 19};
        // In the exercise we are asked to construct a distribution of frequencies of 8 intervals
        // That's why we put 8 in the third parameter of addSeries
        dataset.addSeries(title, vector, intervals);
        return dataset;
    }

    private static JFreeChart createChart(IntervalXYDataset dataset, String x, String y) {
        JFreeChart chart = ChartFactory.createHistogram("Histogram", x, y, dataset, PlotOrientation.VERTICAL, true,
                true, false);
        XYPlot plot = (XYPlot) chart.getPlot();
        XYBarRenderer renderer = (XYBarRenderer) plot.getRenderer();
        renderer.setDrawBarOutline(false);
        try {
            ChartUtilities.saveChartAsJPEG(new File("C:\\Users\\User\\Desktop\\histogram.jpg"), chart, 500, 475);
        } catch (IOException e) {
            System.out.println("Failed to open file");
        }
        return chart;
    }

    public static JPanel createPanel(String title, double vector[], int intervals, String labelx, String labely) {
        JFreeChart chart = createChart(createDataset(title, vector, intervals), labelx, labely);
        return new ChartPanel(chart);
    }

    public static void generateChart(String title, double vector[], int intervals, String labelx, String labely) {
        Histogram2 histo = new Histogram2(title, vector, intervals, labelx, labely);
        histo.pack();
        RefineryUtilities.centerFrameOnScreen(histo);
        histo.setVisible(true);
    }

    public static void main(String[] args) throws IOException {
        double vector[] = { 70, 36, 43, 69, 82, 48, 34, 62, 35, 15, 59, 139, 46, 37, 42, 30, 55, 56, 36, 82, 38, 89,
                54, 25, 35, 24, 22, 9, 55, 19 };
        Histogram2.generateChart("Hello", vector, 5, "x-axis", "y-axis");
    }
}