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JFreeChart is a class library, written in Java, for generating charts.
Utilising the Java2D APIs, it currently supports bar charts, pie charts,
line charts, XY-plots and time series plots.
/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2014, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jfreechart/index.html
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* ------------------
* PieChartDemo1.java
* ------------------
* (C) Copyright 2003-2014, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): ;
*
* Changes
* -------
* 09-Mar-2005 : Version 1, copied from the demo collection that ships with
* the JFreeChart Developer Guide (DG);
*
*/
package org.jfree.chart.demo;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GradientPaint;
import java.awt.Point;
import java.awt.RadialGradientPaint;
import java.awt.geom.Point2D;
import javax.swing.JPanel;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.StandardChartTheme;
import org.jfree.chart.plot.PiePlot;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.general.PieDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.HorizontalAlignment;
import org.jfree.ui.RectangleEdge;
import org.jfree.ui.RectangleInsets;
import org.jfree.ui.RefineryUtilities;
/**
* A simple demonstration application showing how to create a pie chart using
* data from a {@link DefaultPieDataset}.
*/
public class PieChartDemo1 extends ApplicationFrame {
private static final long serialVersionUID = 1L;
static {
// set a theme using the new shadow generator feature available in
// 1.0.14 - for backwards compatibility it is not enabled by default
ChartFactory.setChartTheme(new StandardChartTheme("JFree/Shadow",
true));
}
/**
* Default constructor.
*
* @param title the frame title.
*/
public PieChartDemo1(String title) {
super(title);
setContentPane(createDemoPanel());
}
/**
* Creates a sample dataset.
*
* Source: http://www.bbc.co.uk/news/business-15489523
*
* @return A sample dataset.
*/
private static PieDataset createDataset() {
DefaultPieDataset dataset = new DefaultPieDataset();
dataset.setValue("Samsung", new Double(27.8));
dataset.setValue("Others", new Double(55.3));
dataset.setValue("Nokia", new Double(16.8));
dataset.setValue("Apple", new Double(17.1));
return dataset;
}
/**
* Creates a chart.
*
* @param dataset the dataset.
*
* @return A chart.
*/
private static JFreeChart createChart(PieDataset dataset) {
JFreeChart chart = ChartFactory.createPieChart(
"Smart Phones Manufactured / Q3 2011", // chart title
dataset, // data
false, // no legend
true, // tooltips
false // no URL generation
);
// set a custom background for the chart
chart.setBackgroundPaint(new GradientPaint(new Point(0, 0),
new Color(20, 20, 20), new Point(400, 200), Color.DARK_GRAY));
// customise the title position and font
TextTitle t = chart.getTitle();
t.setHorizontalAlignment(HorizontalAlignment.LEFT);
t.setPaint(new Color(240, 240, 240));
t.setFont(new Font("Arial", Font.BOLD, 26));
PiePlot plot = (PiePlot) chart.getPlot();
plot.setBackgroundPaint(null);
plot.setInteriorGap(0.04);
plot.setOutlineVisible(false);
// use gradients and white borders for the section colours
plot.setSectionPaint("Others", createGradientPaint(new Color(200, 200, 255), Color.BLUE));
plot.setSectionPaint("Samsung", createGradientPaint(new Color(255, 200, 200), Color.RED));
plot.setSectionPaint("Apple", createGradientPaint(new Color(200, 255, 200), Color.GREEN));
plot.setSectionPaint("Nokia", createGradientPaint(new Color(200, 255, 200), Color.YELLOW));
plot.setBaseSectionOutlinePaint(Color.WHITE);
plot.setSectionOutlinesVisible(true);
plot.setBaseSectionOutlineStroke(new BasicStroke(2.0f));
// customise the section label appearance
plot.setLabelFont(new Font("Courier New", Font.BOLD, 20));
plot.setLabelLinkPaint(Color.WHITE);
plot.setLabelLinkStroke(new BasicStroke(2.0f));
plot.setLabelOutlineStroke(null);
plot.setLabelPaint(Color.WHITE);
plot.setLabelBackgroundPaint(null);
// add a subtitle giving the data source
TextTitle source = new TextTitle("Source: http://www.bbc.co.uk/news/business-15489523",
new Font("Courier New", Font.PLAIN, 12));
source.setPaint(Color.WHITE);
source.setPosition(RectangleEdge.BOTTOM);
source.setHorizontalAlignment(HorizontalAlignment.RIGHT);
chart.addSubtitle(source);
return chart;
}
/**
* A utility method for creating gradient paints.
*
* @param c1 color 1.
* @param c2 color 2.
*
* @return A radial gradient paint.
*/
private static RadialGradientPaint createGradientPaint(Color c1, Color c2) {
Point2D center = new Point2D.Float(0, 0);
float radius = 200;
float[] dist = {0.0f, 1.0f};
return new RadialGradientPaint(center, radius, dist,
new Color[] {c1, c2});
}
/**
* Creates a panel for the demo (used by SuperDemo.java).
*
* @return A panel.
*/
public static JPanel createDemoPanel() {
JFreeChart chart = createChart(createDataset());
chart.setPadding(new RectangleInsets(4, 8, 2, 2));
ChartPanel panel = new ChartPanel(chart);
panel.setMouseWheelEnabled(true);
panel.setPreferredSize(new Dimension(600, 300));
return panel;
}
/**
* Starting point for the demonstration application.
*
* @param args ignored.
*/
public static void main(String[] args) {
// ******************************************************************
// More than 150 demo applications are included with the JFreeChart
// Developer Guide...for more information, see:
//
// > http://www.object-refinery.com/jfreechart/guide.html
//
// ******************************************************************
PieChartDemo1 demo = new PieChartDemo1("JFreeChart: Pie Chart Demo 1");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);
}
}