JFree Chart Quick Guide
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JFreeChart - Quick Guide
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JFreeChart - Overview
A chart is a graphical representation of information. There are various tools available,
which can be used to create different types of charts. The JFreeChart project was founded
in February 2000, by David Gilbert. Today, it is the most widely used charting library
among Java developers.
This tutorial will help you understand what exactly JFreeChart is, why is it required, and
the various ways to create different types of charts within a Java-based application or
independently.
What is JFreeChart?
JfreeChart is an open source library developed in Java. It can be used within Java based
applications to create a wide range of charts. By using JFreeChart, we can create all the
major type of 2D and 3D charts such as pie chart, bar chart, line chart, XY chart and 3D
charts.
Why JFreeChart?
JFreeChart is open source and 100% free, which permits usage in the commercial
applications without any cost. We have enlisted here some more points in favor of why you
should use JFreeChart −
It comes with well documented APIs, which makes it quite easy to understand.
It supports a wide range of chart types such as Pie Chart, Line Chart, Bar Chart,
Area Chart and 3D charts.
JFreeChart is easy to extend and can be used in both, the client-side, as well as
the server-side applications.
It supports multiple output formats like PNG, JPEG, PDF, SVG etc.
It allows extensive customizations of charts.
Consider a situation where you are developing an application and you need to show the
data in the form of charts, and the data itself is populated dynamically. In such case,
displaying the data in the form of charts using JFreeChart programming is very simple.
JFreeChart - Installation
JFreeChart is popular for its efficient chart creation and user-friendly installation setup.
This chapter describes the process of setting up JFreeChart on Windows and Linux. User
administration is needed while installing JFreeChart.
System Requirements
JDK
1.5 or above
Memory
2GB RAM
Disk Space
No minimum requirement
Operating System Version
Linux or Windows
Installing JFreeChart
To install JFreeChart, there are three following steps viz…
Step 1: Verifying Java Installation
To verify Java installation, open the console and execute the following java command −
Os
Task
Command
Windows
Open command console
C:>java -version
Linux
Open command terminal
$java -version
Once Java installation is done properly, then you should get the following output for both
the operating systems −
S.No
OS & Description
Windows
1
Java version "1.7.0_60" Java (TM) SE Run Time Environment (build 1.7.0_60b19) Java HotSpot(TM) 64-bit Server VM (build 24.60-b09,mixed mode)
Linux
2
java version "1.7.0_25" OpenJDK Runtime Environment (rhel2.3.10.4.el6_4x86_64) OpenJDK 64-Bit Server VM (build 23.7-b01, mixed mode)
If you do not have Java installed, then install the Java Software Development Kit (SDK)
from the link −
https://www.oracle.com/technetwork/java/javase/downloads/index.html
We assume that you have installed Java 1.7.0_60 version before proceeding for this
tutorial.
Step 2: Setting JAVA Environment
Set the JAVA_HOME environment variable to point to the base directory location where
Java is installed on your machine. For example,
S.No
Os & Description
Windows
1
Set Environmental variable JAVA_HOME to C:\ProgramFiles\java\jdk1.7.0_60
Linux
2
export JAVA_HOME=/usr/local/java-current
Append Java compiler location to System Path.
S.No
1
OS & Description
Windows
Append the String; C:\Program Files\Java\jdk1.7.0_60\bin to the end of the
system variable PATH.
Linux
2
export PATH=$PATH:$JAVA_HOME/bin/
Verify the command java -version from the command prompted as explained above.
Step 3: Installing JFreeChart
Download
the
latest
version
of
http://www.jfree.org/jfreechart/download/
JFreeChart.zip
from
the
link
Unzip the downloaded file at any location
from where required libraries can be linked into your Java program. The following image
shows the structure of the directories and files −
Add complete path of jfreechart-1.0.18.jar and jcommon-1.0.22.jar files to the CLASSPATH
as shown below −
S.No
OS & Description
Windows
1
Append the Strings “C:\ jfreechart-1.0.18\lib\ jfreechart-1.0.18.jar” and “C:\
jfreechart-1.0.18\lib\ jcommon-1.0.22.jar” to the end of the user variable
CLASSPATH
Linux
2
Export
CLASSPATH=$CLASSPATH:
/usr/share/jfreechart1.0.18/lib/jfreechart-
1.0.18.jar: /usr/share/jfreechart-1.0.18/lib/jcommon1.0.22.jar
Note − Inorder to communicate with MySql database you need to set the classpath to
mysql-connector-java-5.0.8-bin.jar too.
JFreeChart - Architecture
This chapter explains basic class level and application level architectures of JFreeChart to
give you an idea about how JFreeChart interacts with different classes and how it fits in
your Java based application.
Class Level Architecture
The class level architecture explains how various classes from the library interact with each
other to create various types of charts.
Following is the detail of the units used in the above block diagram −
S.No
Units & Description
File
1
The source having user input to be used for creating a dataset in the file.
Database
2
The source having user input to be used for creating a dataset in the database.
Create Dataset
3
Accepts the dataset and stores the dataset into dataset object.
4
General Dataset
This type of dataset is mainly used for pie charts.
Category Dataset
5
This type of dataset is used for bar chart, line chart,etc.
Series Dataset
6
This type of dataset is used for storing series of data and construct line charts.
Series Collection Dataset
7
The different categories of series datasets are added to series collection dataset.
This type of dataset is used for XYLine Charts.
Create Chart
8
This is the method which is executed to create final chart.
Frame/Image
9
The chart is displayed on a Swing Frame or an image is created.
Application Level Architecture
The application level architecture explains where JFreeChart library sits inside a Java
Application.
The client program receives user data and then it uses standard Java and JFreeChart APIs
based on requirements to generate the output in the form of either a frame, which can be
displayed directly inside the application or independently in the image formats such as
JPEG or PNG.
JFreeChart - Referenced APIs
In this chapter, we will discuss about some of the important packages, classes, and
methods from JFreeChart library. These packages, classes, and methods are the most
frequently used while creating a variety of charts using JFreeChart library.
ChartFactory Class
ChartFactory is an abstract class under the org.jfree.chart package. It provides a
collection of utility methods for generating standard charts.
Following is a list of few of the important methods −
Class Constructor
S.No
Description
ChartFactory()
1
Default constructor of ChartFactory class.
Class Methods
S.No
Methods & Description
createPieChart(java.lang.String
title,
PieDataset
dataset,
boolean
legend, boolean tooltips, boolean urls)
1
This method creates a pie chart with default settings. It returns JfreeChart type
object.
createPieChart3D(java.lang.String
2
title,
PieDataset
dataset,
boolean
legend, boolean tooltips, boolean urls
This method creates a 3D pie chart using the specified dataset.
3
createBarChart(java.lang.String title, java.lang.String categoryAxisLabel,
java.lang.String
valueAxisLabel,
CategoryDataset
dataset,
PlotOrientation orientation, boolean legend, boolean tooltips, boolean
urls)
The argument java.lang.String categoryAxisLabel is the label for values placed on
X-axis. The argument java.lang.String valueAxisLabel is the label for values
placed on Y-axis.
This method creates a bar chart.
createBarChart3D(java.lang.String
categoryAxisLabel,
title,
java.lang.String
valueAxisLabel,
java.lang.String
CategoryDataset
dataset, PlotOrientation orientation, boolean legend, boolean tooltips,
4
boolean urls)
This Method Creates a bar chart with a 3D effect. It returns JfreeChart type
object.
createLineChart(java.lang.String
categoryAxisLabel,
5
title,
java.lang.String
valueAxisLabel,
java.lang.String
CategoryDataset
dataset, PlotOrientation orientation, boolean legend, boolean tooltips,
boolean urls)
This method creates a line chart with default settings.
createLineChart3D(java.lang.String
categoryAxisLabel,
6
java.lang.String
title,
java.lang.String
valueAxisLabel,
CategoryDataset
dataset, PlotOrientation orientation, boolean legend, boolean tooltips,
boolean urls)
This method creates a line chart with 3D effect.
createXYLineChart(java.lang.String
java.lang.String
7
yAxisLabel,
title,
XYDataset
java.lang.String
dataset,
xAxisLabel,
PlotOrientation
orientation, boolean legend, boolean tooltips, boolean urls)
This method creates a line chart based on XYDataset with default settings.
ChartFrame Class
ChartFrame class under the org.jfree.chart package, provides all frame related functions
and utilities. ChartFrame class inherits functionalities from parent classes such as Frame,
Window, Container, and Component classes.
Class Constructor
S.No
Constructor and Description
ChartFrame (java.lang.Frame String, JfreeChart chart)
1
2
It constructs a frame.
Chart
Frame
(java.lang.Frame
String,
JfreeChart
chart,
boolean
scrollpane)
It constructs a frame.
Class Method
S.No
Method and Description
getChartPanel()
1
This method returns the chart panel for a frame.
ChartPanel Class
ChartPanel class from the org.jfree.chart package is used as a swing GUI component for
displaying JfreeChart object.
Class Constructor
S.No
Constructor and Description
ChartPanel(JFreeChart chart)
1
This constructor constructs a panel that displays the specified chart.
ChartPanel(JFreeChart chart, boolean useBuffer)
2
This constructor constructs a panel containing a chart.
ChartPanel(JFreeChart chart, boolean properties, boolean save, boolean
3
print, boolean zoom, boolean tooltips)
This constructor constructs a JFreeChart panel.
Class Method
S.No
Method and Description
setPreferredSize(java.awt.Dimension)
1
This method is used to set the frame size using java.awt. Dimension class object
as an argument. This method is taken from javax.swing.JComponent.
ChartUtilities Class
CharUtilites class from the org.jfree.chart package provides a collection of utility methods
of JFreeCharts including methods for converting charts into image file format such as PNG,
JPEG, and creating HTML image maps.
Class Constructor
S.No
Constructor and Description
ChartUtilities()
1
This is a default constructor of a class
Class Method
S.No
Method and Description
saveChartAsPNG(java.io.File file, JfreeChart chart, int width, int height)
1
This method converts and saves a chart to the specified file in PNG format.
saveChartAsJPEG(java.io.File file, JfreeChart chart, int width, int height)
2
This method converts and saves a chart to the specified file in JPEG format.
JFreeChart Class
JFreeChart class is the core class under the org.jfree.chart package. This class provides
JFreeChart method to create bar charts, line charts, pie charts, and xy plots including time
series data.
Class Constructor
S.No
Constructor and Description
JfreeChart(Plot plot)
1
This constructor creates a new chart based on the supplied plot.
JfreeChart(java.lang.String
2
title,
java.awt.Font
titleFont,
boolean createLegend)
This constructor creates a new chart with the given title and plot.
3
JfreeChart(java.lang.String title, Plot plot)
This constructor creates a new chart with the given title and plot.
Plot
plot,
Class Method
S.No
Method and Description
getXYPlot()
1
This method Returns the plot chart as XYPlot. Using XYPolt, we can do some
utility operations on xy charts.
PiePlot Class
This class is a part of org.jfree.chart.plot package and extends Plot class from the same
package. This class provides methods to create Pie Plots.
Class Constructor
S.No
Constructor and Description
PiePlot()
1
It creates a new plot.
PiePlot(PieDataset dataset)
2
It creates a plot that draws a pie chart for the specified dataset.
Class Method
S.No
Method and Description
setStartAngle(double angle)
1
This Method sets the starting angle and sends a PlotChangeEvent to all registered
listeners
PiePlot3D Class
PiePlot3D class is a subclass of PiePlot class under the same package. Hence, this class has
the same features as PiePlot class, except it is used to create 3D plots.
Class Constructor
S.No
Constructor and Description
1
PiePlot3D()
This constructor creates a new instance with no dataset.
PiePlot3D(PieDataset dataset)
2
This constructor creates a pie chart with three dimensional effect using a
specified dataset.
Class Method
S.No
Method and Description
setForegroundAlpha(float alpha)
1
It sets the alpha-transparency for the plot and sends a PlotChangeEvent to all
registered listeners. This is taken from one of the parent Plot classes.
setInteriorGap(double percent)
It sets the interior gap and sends a PlotChangeEvent to all registered listeners.
2
This controls the space between the edges of the pie plot and the plot area itself
(i. e., the region where the section labels appear). This method is taken from the
parent class PiePlot.
PlotOrientation Class
This is a serialized class available in org.jfree.chart.plot package and it is used to show
the orientation of a 2D plot. The orientation can either be vertical or horizontal. It sets
the orientation of Y-axis. A conventional plot has a vertical Y- axis.
Field summary
S.No
Type
Field & Description
1
PlotOrientation
HORIZONTAL For a plot where the range axis(Y-axis) is horizontal.
2
PlotOrientation
VERTICAL For a plot where the range axis(Y-axis) is vertical. This is
the default orientation.
Class Method
S.No
1
Method and Description
isHorizontal()
This method returns true if this orientation is HORIZONTAL, and false otherwise.
isVertical()
2
This Method returns true if this orientation is VERTICAL, and false otherwise.
XYPlot Class
This is a general class available in org.jfree.chart.plot package and it is used for the
plotting data in the form of (x,y) pairs. This plot can use data from any other class that
implements the XYDataSet Interface. XYPlot makes use of a XYItemRenderer to draw each
point on the plot.
Class Constructor
S.No
Constructor and Description
XYPlot()
1
This contractor creates a new XYPlot instance with no dataset, no axes and no
renderer.
XYPlot(XYDataset dataset, ValueAxis domainAxis, ValueAxis rangeAxis,
2
XYItemRenderer renderer)
This constructor creates a new plot with the specified dataset, axis, and renderer.
Class Method
S.No
Method and Description
setRenderer(XYItemRenderer renderer)
1
This method sets the renderer for the primary dataset and sends a change event
to all registered listeners.
NumberAxis Class
This class is available in org.jfree.chart.axis package and it can access the numerical
data of any axis. When we set the range of any axis to default, it fits according to the
range of the data. But using NumberAxis, class we can set the lower margin and upper
margin of domain and range axes.
Class Constructor
S.No
Constructor and Description
NumberAxis( )
1
This is a default Constructor of NumberAxis.
NumberAxis( java.lang.String label)
2
The constructor NumberAxis uses default values where necessary.
Class Method
S.No
Method and Description
setLowerMargin(double margin)
1
It sets the lower margin for the axis (as a percentage of the axis range) and
sends an AxisChangeEvent to all registered listeners. This method is taken
from parent class of the class ValueAxis.
setUpperMargin(double margin)
2
It sets the upper margin for the axis (as a percentage of the axis range) and
sends an AxisChangeEvent to all registered listeners. This method is also
present in ValueAxis Class.
XYLineAndShapeRenderer Class
This is the class, available under org.jfree.chart.renderer.xy package, which takes care
of connecting data points with lines and draws shapes at each data point. This renderer
class is designed for use with the XYPlot class.
Class Constructor
S.No
Constructor & Description
XYLineAndShapeRenderer()
1
It creates a new renderer with both lines and shapes visible.
XYLineAndShapeRenderer (boolean lines, boolean shapes)
2
It creates a new renderer with specific property.
Class Method
S.No
Method and Description
setSeriesPaint(int series, java.awt.Paint paint)
1
This
method
sets
the
paint
used
for
a
series
and
sends
a
RendererChangeEvent to all registered listeners. This method is taken from
AbstratRenderer abstract class from renderer package in JFreeChart API.
setSeriesStroke(int series, java.awt.Stroke stroke)
2
This
method
Sets
the
stroke
used
for
a
series
and
sends
a
RendererChangeEvent to all registered listeners. This method is taken from
AbstratRenderer abstract class, which is super class of this package.
XYItemRenderer general datasets
This is an interface for rendering the format of a single (x, y) item on a XYPlot. The
package is org.Jfree.data.general, which has classes and interfaces to define different
types of datasets to construct charts.
PieDataset
This is an interface used as a general purpose dataset, where values are associated with
keys. As the name suggests, you can use this dataset to supply data for pie charts. This
interface extends KeyedValues and DataSet interfaces. All the methods used for this
interface are taken from KeyedValues, Values, and Dataset interfaces.
DefaultPieDataset Class
This is a Default implementation class of a PieDataset interface.
Class Constructor
S.No
Constructor and Description
DefaultPieDataset()
1
This constructor creates a new dataset, initially empty.
DefaultPieDataset(KeyedValues data)
2
It creates a new dataset by copying data from a KeyedValues instance.
Class Method
S.No
Method & Description
setValue(java.lang.Comparable key, double value)
It sets the data value for a key and sends a DatasetChangeEvent to all
1
registered listeners.
setValue(java.lang.Comparable key, java.lang.Number value)
It sets the data value for a key and sends a DatasetChangeEvent to all
2
registered listeners.
SeriesException Class
This is an exception class. It raises an exception occurred in the time series of data in the
dataset. Exceptions are raised on the occurrence of duplicate or invalid data. The time
series must not be applied with duplicates and the format must be valid.
DefaultCategoryDataset
This is a default implementation class of CategoryDataset interface.
Class Constructor
S.No
Constructor and Description
DefaultCategoryDataset()
1
This constructor creates new empty dataset.
Class Method
S.No
Method and Description
addValue(double
1
value,
java.lang.Comparable
rowKey,
java.lang.Comparable columnKey)
This method adds a value to the table using comparable keys.
addValue(java.lang.Number
2
value,
java.lang.Comparable columnKey)
This method adds a value to the table.
java.lang.Comparable
rowKey,
3
setValue(double
value,
java.lang.Comparable
rowKey,
java.lang.Comparable columnKey)
This
method
adds
or
updates
a
value
in
the
table
and
sends
a
DatasetChangeEvent to all registered listeners.
setValue(java.lang.Number
value,
java.lang.Comparable
rowKey,
java.lang.Comparable columnKey)
4
This
method
adds
or
updates
a
value
in
the
table
and
sends
a
DatasetChangeEvent to all registered listeners.
Refer JFreeChart API for more information on various other methods and fields.
Series Datasets
The series dataset is used by XY charts. The package is org.Jfree.data.xy, which contains
classes and interfaces belonging to xy charts. The core interface is XYDataset.
XYDataset
This is an interface through which data in the form of (x,y) items can be accessed. As the
name suggests, you can use this dataset to serve XY chart. Some of the methods in this
interface are taken from SeriesDateset interface.
XYZDataset
This is an interface through which data in the form of (x,y,z) items can be accessed. As the
name suggests, you can use this dataset to serve XYZ chart. Some of the methods in this
interface are taken from SeriesDateset.
XYSeries
This is a class, which represents a sequence of zero or more data items in the form (x, y).
By default, the items in the series are sorted into ascending order by x-value, and
duplicate x-values are permitted. Both the sorting and duplicate defaults can be changed in
the constructor. Y-values can be denoted as null to represent missing values.
Class Constructor
S.No
1
Constructor and Description
XYSeries(java.lang.Comparable key)
This constructor creates a new empty series.
XYSeries(java.lang.Comparable key, boolean autoSort)
It constructs a new empty series, with the auto-sort flag set as requested, and
2
duplicate values are allowed.
XYSeries(java.lang.Comparable
key,
boolean
autoSort,
boolean
allowDuplicateXValues)
3
It constructs a new xy-series that contains no data.
Class Method
S.No
Method and Description
add(double x, double y)
1
This method adds data item into the series.
The above method is used in the tutorial example. If you want to learn the remaining
methods and fields, please refer JFreeChart API.
XYSeriesCollection
XYSeriesCollection class has parent classes like AbstractIntervelDataset, AbstractXYDatset,
AbstractSeriesDataset and AbstractDataset. Some of the methods in this class belong to
parent classes of this class.
Class Constructor
S.No
Constructor and Description
XYSeriesCollection()
1
It constructs an empty dataset.
XYSeriesCollection(XYSeries xyseries)
2
It constructs a dataset and populates it with a single series.
Class Method
S.No
1
Method and Description
addSeries(XYSeries series)
This method adds a series to the collection and sends a DatasetChangeEvent
to all registered listeners.
Refer JFreeChart API for the remaining methods and fields.
Default XYZDataset
DefaultXYZDataset
class
have
parent
classes
like
AbstractIntervelDataset,
AbstractXYDatset, AbstractSeriesDataset, AbstractDataset and AbstractXYZDataset. Some
of the methods in this class belong to parent classes of this class.
class constructor
S.No
Constructor and Description
DefaultXYZDataset()
1
It constructs an empty dataset.
Class Method
S.No
Method and Description
addSeries(java.lang.Comparable seriesKey, double[ ][ ] data )
1
This method adds a series to the collection and sends a DatasetChangeEvent
to all registered listeners.
Please refer JFreeChart API for the remaining methods and fields.
Time Series in JFreeCharts
The package is org.jfree.data.time. This package contains classes and interfaces, which
are used for the time related data.
TimeSeries
This class represents a sequence of data items in the form of period values, where period
is some instance of RegularTimePeriod abstract class such as Time, Day, Hour, Minute, and
Second classes.
Class Constructor
S.No
1
Constructor and Description
TimeSeries(java.lang.Comparable name)
It creates new empty series.
TimeSeries(java.lang.Comarable
name,
java.lang.String
domain,
java.lang.Strin range)
2
It creates new time series that contains no data.
Class Method
S.No
Method and Description
add(RegularTimePeriod period,double value)
1
This method adds a new data item to the series.
Refer JFreeChart API for the remaining methods and fields.
TimeSeriesCollection
This is a class used as a collection of time series objects. This class implements the
XYDataset interface, as well as it extends IntervelXYDataset interface. This makes it
convenient to collect series data objects.
Class Constructor
S.No
Constructor and Description
TimeSeriesCollection()
1
It constructs an empty dataset, tied to the default time zone.
TimeSeriesCollection(TimeSeries series)
2
It constructs a dataset containing a single series (more can be added), tied to the
default time zone.
TimeSeriesCollection(TimeSeries series, java.util.TimeZone zone)
3
It constructs a dataset containing a single series (more can be added), tied to a
specific time zone.
TimeSeriesCollection(java.util.TimeZone zone)
4
It constructs an empty dataset, tied to a specific time zone.
Class Method
S.No
Method and Description
addSeries(TimeSeries series)
1
This method adds a series to the collection and sends a DatasetChangeEvent
to all registered listeners.
Please refer JFreeChart API for the remaining methods and fields.
Second
This class represents a second in a particular day. This class is immutable, which is a
requirement for all RegularTimePeriod subclass.
Class Constructor
S.No
Constructor and Description
Second()
1
It constructs a new Second, based on the system date/time.
Second(java.util.Date time)
2
It constructs a new instance from the specified date/time and the default time
zone.
Second(java.util.Date
3
time,
java.util.TimeZone
zone,
java.util.Locale
locale)
It creates a new second based on the supplied time and time zone.
Second(int second, int minute, int hour, int day, int month, int year
4
It creates a new second.
Second(int second, Minute minute)
5
It constructs a new Second.
Class Method
S.No
Method and Description
1
getSecond()
It returns the second within the minute.
next()
2
It returns the second following the present second.
Please refer JFreeChart API for the remaining methods and fields.
Frames in JFreeCharts
The package is org.jfree.ui. This is the package belongs to JCommons API of JFreeChart.
It contains utility classes used for creating frames for pre-configured charts.
ApplicationFrame
This is a base class for creating the main frame for simple applications. The frame listens
for window closing events, and responds by shutting down the JVM. This is fine for small
demo applications. For enterprise applications, you need to use something more robust.
The main core methods in this class are taken from Component, Container, Window,
Frame, and Jframe classes.
Class Constructor
S.No
Constructor & Description
ApplicationFrame(java.lang.String title)
1
It creates an application frame with the string title.
This class helps to create AWT Frames. This is the reason for why we use this class as
super class in this tutorial examples.
The methods, which are taken form the parent classes are used for opening a frame,
closing a frame, changing the size, changing the background or foreground color, and
listeners.
RefineryUtilities
This is a class collection of utility methods relating to user interface.
Class Method
S.No
Method and Description
1
centerFrameOnScreen(java.awt.Window frame)
It positions the specified frame in the middle of the screen.
The above method is used in the tutorial example. Refer JFreeChart API for remaining
methods and fields.
JFreeChart - Pie Chart
In a pie chart, the arc length of each sector is proportional to the quantity that it
represents. This chapter demonstrates — how we can use JFreeChart to create Pie Chart
from a given set of business data.
Business data
The following example depicts mobile sale with the help of a pie chart. Following is a list of
different mobile brands and their sale (units per day).
S.No
Mobile Brands
Sales (UNITS per day)
1
Iphone 5S
20
2
Samsung Grand
20
3
MOTO G
40
4
Nokia Lumia
10
AWT Based Application
Following is the code to create a Pie Chart by using the above given information. This code
helps you to embed a pie chart in any AWT based application.
import javax.swing.JPanel;
import
import
import
import
import
import
import
org.jfree.chart.ChartFactory;
org.jfree.chart.ChartPanel;
org.jfree.chart.JFreeChart;
org.jfree.data.general.DefaultPieDataset;
org.jfree.data.general.PieDataset;
org.jfree.ui.ApplicationFrame;
org.jfree.ui.RefineryUtilities;
public class PieChart_AWT extends ApplicationFrame {
public PieChart_AWT( String title ) {
super( title );
setContentPane(createDemoPanel( ));
}
private static PieDataset createDataset( ) {
DefaultPieDataset dataset = new DefaultPieDataset( );
dataset.setValue( "IPhone 5s" , new Double( 20 ) );
dataset.setValue( "SamSung Grand" , new Double( 20 ) );
dataset.setValue( "MotoG" , new Double( 40 ) );
dataset.setValue( "Nokia Lumia" , new Double( 10 ) );
return dataset;
}
private static JFreeChart createChart( PieDataset dataset ) {
JFreeChart chart = ChartFactory.createPieChart(
"Mobile Sales",
// chart title
dataset,
// data
true,
// include legend
true,
false);
return chart;
}
public static JPanel createDemoPanel( ) {
JFreeChart chart = createChart(createDataset( ) );
return new ChartPanel( chart );
}
public static void main( String[ ] args ) {
PieChart_AWT demo = new PieChart_AWT( "Mobile Sales" );
demo.setSize( 560 , 367 );
RefineryUtilities.centerFrameOnScreen( demo );
demo.setVisible( true );
}
}
Let us keep the above Java code in PieChart_AWT.java file, and then compile and run it
from the command prompted as −
$javac PieChart_AWT.java
$java PieChart_AWT
If everything is fine, it will compile and run to generate the following Pie Graph −
If you do not need to embed your chart in any application, then you can create chart
images at command prompt. JFreeChart allows you to save chart images in either JPG or
PNG formats.
JPEG Image Creation
Let us re-write the above example to generate a JPEG image from a command line.
Following are the two APIs provided by JFreeChart library, which you can use to generate
either PNG or JPEG image as per your requirement.
saveChartAsPNG() − API to save image in PNG format.
saveChartAsJPEG() − API to save image in JPEG format.
import java.io.*;
import
import
import
import
org.jfree.chart.ChartUtilities;
org.jfree.chart.ChartFactory;
org.jfree.chart.JFreeChart;
org.jfree.data.general.DefaultPieDataset;
public class PieChart {
public static void main( String[ ] args ) throws Exception {
DefaultPieDataset dataset = new DefaultPieDataset( );
dataset.setValue("IPhone 5s", new Double( 20 ) );
dataset.setValue("SamSung Grand", new Double( 20 ) );
dataset.setValue("MotoG", new Double( 40 ) );
dataset.setValue("Nokia Lumia", new Double( 10 ) );
JFreeChart chart = ChartFactory.createPieChart(
"Mobile Sales",
// chart title
dataset,
// data
true,
// include legend
true,
false);
int width = 640;
/* Width of the image */
int height = 480; /* Height of the image */
File pieChart = new File( "PieChart.jpeg" );
ChartUtilities.saveChartAsJPEG( pieChart , chart , width , height );
}
}
Let us keep the above Java code in PieChart.java file, and then compile and run it from
the command prompted as −
$javac PieChart.java
$java PieChart
If everything is fine, it will compile and run to create a JPEG image file named
PieChart.jpeg in your current directory.
JFreeChart - Bar Chart
This chapter demonstrates how you can use JFreeChart to create Bar Chart from a given
set of business data.
A bar chart uses different orientation (horizontal or vertical) bars to show comparisons in
various categories. One axis (domain axis) of the chart shows the specific domain being
compared, and the other axis (range axis) represents discrete values.
Business Data
The following example depicts various car statistics with the help of a bar chart. Following
is a list of car brands along with their different characteristics, which we will show using a
bar chart −
Car
Speed
User Rating
Millage
Safety
Fiat
1.0
3.0
5.0
5.0
Audi
5.0
6.0
10.0
4.0
Ford
4.0
2.0
3.0
6.0
AWT Based Application
Following is the code to create a Bar Chart from the above given information. This code
helps you to embed a bar chart in any AWT based application.
import
import
import
import
import
import
import
import
org.jfree.chart.ChartFactory;
org.jfree.chart.ChartPanel;
org.jfree.chart.JFreeChart;
org.jfree.chart.plot.PlotOrientation;
org.jfree.data.category.CategoryDataset;
org.jfree.data.category.DefaultCategoryDataset;
org.jfree.ui.ApplicationFrame;
org.jfree.ui.RefineryUtilities;
public class BarChart_AWT extends ApplicationFrame {
public BarChart_AWT( String applicationTitle , String chartTitle ) {
super( applicationTitle );
JFreeChart barChart = ChartFactory.createBarChart(
chartTitle,
"Category",
"Score",
createDataset(),
PlotOrientation.VERTICAL,
true, true, false);
ChartPanel chartPanel = new ChartPanel( barChart );
chartPanel.setPreferredSize(new java.awt.Dimension( 560 , 367 ) );
setContentPane( chartPanel );
}
private CategoryDataset createDataset( ) {
final String fiat = "FIAT";
final String audi = "AUDI";
final String ford = "FORD";
final String speed = "Speed";
final String millage = "Millage";
final String userrating = "User Rating";
final String safety = "safety";
final DefaultCategoryDataset dataset =
new DefaultCategoryDataset( );
dataset.addValue(
dataset.addValue(
dataset.addValue(
dataset.addValue(
1.0
3.0
5.0
5.0
,
,
,
,
dataset.addValue(
dataset.addValue(
dataset.addValue(
dataset.addValue(
5.0 , audi , speed );
6.0 , audi , userrating );
10.0 , audi , millage );
4.0 , audi , safety );
dataset.addValue(
dataset.addValue(
dataset.addValue(
dataset.addValue(
4.0
2.0
3.0
6.0
,
,
,
,
fiat
fiat
fiat
fiat
ford
ford
ford
ford
,
,
,
,
,
,
,
,
speed );
userrating );
millage );
safety );
speed );
userrating );
millage );
safety );
return dataset;
}
public static void main( String[ ] args ) {
BarChart_AWT chart = new BarChart_AWT("Car Usage Statistics",
"Which car do you like?");
chart.pack( );
RefineryUtilities.centerFrameOnScreen( chart );
chart.setVisible( true );
}
}
Let us keep the above Java code in BarChart_AWT.java file, and then compile and run it
from the command prompted as −
$javac BarChar_AWT.java
$java BarChart_AWT
If everything is fine, it will compile and run to generate the following Bar Graph −
JPEG Image Creation
Let us re-write the above example to generate a JPEG image from a command line.
import java.io.*;
import
import
import
import
import
org.jfree.chart.ChartFactory;
org.jfree.chart.JFreeChart;
org.jfree.chart.plot.PlotOrientation;
org.jfree.data.category.DefaultCategoryDataset;
org.jfree.chart.ChartUtilities;
public class BarChart {
public static void main( String[ ] args )throws Exception {
final String fiat = "FIAT";
final String audi = "AUDI";
final String ford = "FORD";
final String speed = "Speed";
final String millage = "Millage";
final String userrating = "User Rating";
final String safety = "safety";
final DefaultCategoryDataset
dataset.addValue( 1.0 , fiat
dataset.addValue( 3.0 , fiat
dataset.addValue( 5.0 , fiat
dataset.addValue( 5.0 , fiat
dataset = new DefaultCategoryDataset( );
, speed );
, userrating );
, millage );
, safety );
dataset.addValue(
dataset.addValue(
dataset.addValue(
dataset.addValue(
5.0 , audi , speed );
6.0 , audi , userrating );
10.0 , audi , millage );
4.0 , audi , safety );
dataset.addValue(
dataset.addValue(
dataset.addValue(
dataset.addValue(
4.0
2.0
3.0
6.0
,
,
,
,
ford
ford
ford
ford
,
,
,
,
speed );
userrating );
millage );
safety );
JFreeChart barChart = ChartFactory.createBarChart(
"CAR USAGE STATIStICS",
"Category", "Score",
dataset,PlotOrientation.VERTICAL,
true, true, false);
int width = 640;
/* Width of the image */
int height = 480;
/* Height of the image */
File BarChart = new File( "BarChart.jpeg" );
ChartUtilities.saveChartAsJPEG( BarChart , barChart , width , height );
}
}
Let us keep the above Java code in BarChart.java file, and then compile and run it from
the command prompted as −
$javac BarChart.java
$java BarChart
If everything is fine, it will compile and run to create a JPEG image file named
BarChart.jpeg in your current directory.
JFreeChart - Line Chart
A line chart or line graph displays information as a series of data points (markers)
connected by straight line segments. Line Chart shows how data changes at equal time
frequency.
This chapter demonstrates how we can use JFreeChart to create Line Chart from a given
set of business data.
Business Data
The following example draws a line chart to show a trend of number of schools opened in
different years starting from 1970.
Given data is as follows −
Year
Number OF Schools
1970
15
1980
30
1990
60
2000
120
2013
240
2014
300
AWT Based Application
Following is the code to create Line Chart from the information above given. This code
helps you to embed a line chart in any AWT based application.
import
import
import
import
import
import
import
org.jfree.chart.ChartPanel;
org.jfree.chart.ChartFactory;
org.jfree.chart.JFreeChart;
org.jfree.ui.ApplicationFrame;
org.jfree.ui.RefineryUtilities;
org.jfree.chart.plot.PlotOrientation;
org.jfree.data.category.DefaultCategoryDataset;
public class LineChart_AWT extends ApplicationFrame {
public LineChart_AWT( String applicationTitle , String chartTitle ) {
super(applicationTitle);
JFreeChart lineChart = ChartFactory.createLineChart(
chartTitle,
"Years","Number of Schools",
createDataset(),
PlotOrientation.VERTICAL,
true,true,false);
ChartPanel chartPanel = new ChartPanel( lineChart );
chartPanel.setPreferredSize( new java.awt.Dimension( 560 , 367 ) );
setContentPane( chartPanel );
}
private DefaultCategoryDataset createDataset( ) {
DefaultCategoryDataset dataset = new DefaultCategoryDataset( );
dataset.addValue( 15 , "schools" , "1970" );
dataset.addValue( 30 , "schools" , "1980" );
dataset.addValue( 60 , "schools" , "1990" );
dataset.addValue( 120 , "schools" , "2000" );
dataset.addValue( 240 , "schools" , "2010" );
dataset.addValue( 300 , "schools" , "2014" );
return dataset;
}
public static void main( String[ ] args ) {
LineChart_AWT chart = new LineChart_AWT(
"School Vs Years" ,
"Numer of Schools vs years");
chart.pack( );
RefineryUtilities.centerFrameOnScreen( chart );
chart.setVisible( true );
}
}
Let us keep the above Java code in LineChart_AWT.java file, and then compile and run it
from the command prompted as −
$javac LineChart_AWT.java
$java LineChart_AWT
If everything is fine, it will compile and run to generate the following Line Graph −
JPEG Image Creation
Let us re-write the above example to generate a JPEG image from a command line.
import java.io.*;
import
import
import
import
import
org.jfree.chart.JFreeChart;
org.jfree.chart.ChartFactory;
org.jfree.chart.ChartUtilities;
org.jfree.chart.plot.PlotOrientation;
org.jfree.data.category.DefaultCategoryDataset;
public class LineChart {
public static void main( String[ ] args ) throws Exception {
DefaultCategoryDataset line_chart_dataset = new DefaultCategoryDataset();
line_chart_dataset.addValue( 15 , "schools" , "1970" );
line_chart_dataset.addValue( 30 , "schools" , "1980" );
line_chart_dataset.addValue( 60 , "schools" , "1990" );
line_chart_dataset.addValue( 120 , "schools" , "2000" );
line_chart_dataset.addValue( 240 , "schools" , "2010" );
line_chart_dataset.addValue( 300 , "schools" , "2014" );
JFreeChart lineChartObject = ChartFactory.createLineChart(
"Schools Vs Years","Year",
"Schools Count",
line_chart_dataset,PlotOrientation.VERTICAL,
true,true,false);
int width = 640;
/* Width of the image */
int height = 480;
/* Height of the image */
File lineChart = new File( "LineChart.jpeg" );
ChartUtilities.saveChartAsJPEG(lineChart ,lineChartObject, width ,height);
}
}
Let us keep the above Java code in LineChart.java file, and then compile and run it from
the command prompted as −
$javac LineChart.java
$java LineChart
If everything is fine, it will compile and execute to create a JPEG image file named
LineChart.jpeg in your current directory.
JFreeChart - XY Chart
The XY chart (scatter) is based on one data series consisting of a list of X and Y values.
Each value pair (X,Y) is a point in a coordinate system. Here, one value determines the
horizontal (X) position, and the other determines the vertical (Y) position. This chapter
demonstrates — how we can use JFreeChart to create XY Chart from a given set of
business data.
Business Data
Consider an example where we want to create an XY chart for all major browsers. Here,
different performance scores are gathered from different categories of people as shown
below −
Firefox
Category(X)
Score(Y)
1.0
1.0
2.0
4.0
3.0
3.0
Category(X)
Score(Y)
1.0
4.0
2.0
5.0
3.0
6.0
Category(X)
Score(Y)
3.0
4.0
4.0
5.0
5.0
4.0
Chrome
IE
AWT Based Application
Following is the code to create an XY Chart from the above given information. This code
helps you to embed an XY chart in any AWT based application.
import java.awt.Color;
import java.awt.BasicStroke;
import
import
import
import
import
import
import
import
import
import
import
org.jfree.chart.ChartPanel;
org.jfree.chart.JFreeChart;
org.jfree.data.xy.XYDataset;
org.jfree.data.xy.XYSeries;
org.jfree.ui.ApplicationFrame;
org.jfree.ui.RefineryUtilities;
org.jfree.chart.plot.XYPlot;
org.jfree.chart.ChartFactory;
org.jfree.chart.plot.PlotOrientation;
org.jfree.data.xy.XYSeriesCollection;
org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
public class XYLineChart_AWT extends ApplicationFrame {
public XYLineChart_AWT( String applicationTitle, String chartTitle ) {
super(applicationTitle);
JFreeChart xylineChart = ChartFactory.createXYLineChart(
chartTitle ,
"Category" ,
"Score" ,
createDataset() ,
PlotOrientation.VERTICAL ,
true , true , false);
ChartPanel chartPanel = new ChartPanel( xylineChart );
chartPanel.setPreferredSize( new java.awt.Dimension( 560 , 367 ) );
final XYPlot plot = xylineChart.getXYPlot( );
XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer( );
renderer.setSeriesPaint( 0 , Color.RED );
renderer.setSeriesPaint( 1 , Color.GREEN );
renderer.setSeriesPaint( 2 , Color.YELLOW );
renderer.setSeriesStroke( 0 , new BasicStroke( 4.0f ) );
renderer.setSeriesStroke( 1 , new BasicStroke( 3.0f ) );
renderer.setSeriesStroke( 2 , new BasicStroke( 2.0f ) );
plot.setRenderer( renderer );
setContentPane( chartPanel );
}
private XYDataset createDataset( ) {
final XYSeries firefox = new XYSeries( "Firefox" );
firefox.add( 1.0 , 1.0 );
firefox.add( 2.0 , 4.0 );
firefox.add( 3.0 , 3.0 );
final XYSeries chrome
chrome.add( 1.0 , 4.0
chrome.add( 2.0 , 5.0
chrome.add( 3.0 , 6.0
final XYSeries
iexplorer.add(
iexplorer.add(
iexplorer.add(
= new XYSeries( "Chrome" );
);
);
);
iexplorer
3.0 , 4.0
4.0 , 5.0
5.0 , 4.0
= new XYSeries( "InternetExplorer" );
);
);
);
final XYSeriesCollection dataset = new XYSeriesCollection( );
dataset.addSeries( firefox );
dataset.addSeries( chrome );
dataset.addSeries( iexplorer );
return dataset;
}
public static void main( String[ ] args ) {
XYLineChart_AWT chart = new XYLineChart_AWT("Browser Usage Statistics",
"Which Browser are you using?");
chart.pack( );
RefineryUtilities.centerFrameOnScreen( chart );
chart.setVisible( true );
}
}
Let us keep the above Java code in XYLineChart_AWT.java file, and then compile and
run it from the command prompted as:
$javac XYLineChart_AWT.java
$java XYLineChart_AWT
If everything is fine, it will compile and run to generate the following XY Graph −
JPEG Image Creation
Let us re-write the above example to generate a JPEG image from the command line.
import java.io.*;
import
import
import
import
import
import
org.jfree.chart.ChartFactory;
org.jfree.chart.JFreeChart;
org.jfree.data.xy.XYSeries;
org.jfree.chart.plot.PlotOrientation;
org.jfree.data.xy.XYSeriesCollection;
org.jfree.chart.ChartUtilities;
public class XYLineChart_image {
public static void main( String[ ] args )throws Exception {
final XYSeries firefox = new XYSeries( "Firefox" );
firefox.add( 1.0 , 1.0 );
firefox.add( 2.0 , 4.0 );
firefox.add( 3.0 , 3.0 );
final XYSeries chrome
chrome.add( 1.0 , 4.0
chrome.add( 2.0 , 5.0
chrome.add( 3.0 , 6.0
final XYSeries
iexplorer.add(
iexplorer.add(
iexplorer.add(
= new XYSeries( "Chrome" );
);
);
);
iexplorer
3.0 , 4.0
4.0 , 5.0
5.0 , 4.0
= new XYSeries( "InternetExplorer" );
);
);
);
final XYSeriesCollection dataset = new XYSeriesCollection( );
dataset.addSeries( firefox );
dataset.addSeries( chrome );
dataset.addSeries( iexplorer );
JFreeChart xylineChart = ChartFactory.createXYLineChart(
"Browser usage statastics",
"Category",
"Score",
dataset,
PlotOrientation.VERTICAL,
true, true, false);
int width = 640;
/* Width of the image */
int height = 480; /* Height of the image */
File XYChart = new File( "XYLineChart.jpeg" );
ChartUtilities.saveChartAsJPEG( XYChart, xylineChart, width, height);
}
}
Let us keep the above Java code in XYLineChart_image.java file, and then compile and
run it from the command prompted as −
$javac XYLineChart_image.java
$java XYLineChart_image
If everything is fine, it will compile and run to create a JPEG image file named
XYLineChart.jpeg in your current directory.
JFreeChart - 3D Pie/Bar Chart
The 3D charts are the ones, which appear in a three-dimensional format. You can use
these charts to provide better display and clear information. A 3D Pie chart is same as the
pie chart additionally with a nice 3D effect. A 3D effect can be achieved by adding a little
extra code, which will take care of creating 3D effect in a pie chart.
3D Pie chart
Consider the following example to illustrate mobile sale with the help of a 3D pie chart.
Following is a list of different mobile brands and their sale (units per day).
S.No
Mobile Brands
Sales (UNITS per day)
1
Iphone 5S
20
2
Samsung Grand
20
3
MOTO G
40
4
Nokia Lumia
10
Following is the code to create 3D Pie Chart from the above given information. This code
helps you to embed a pie chart in any AWT based application.
import java.io.*;
import
import
import
import
import
org.jfree.chart.ChartFactory;
org.jfree.chart.JFreeChart;
org.jfree.chart.plot.PiePlot3D;
org.jfree.data.general.DefaultPieDataset;
org.jfree.chart.ChartUtilities;
public class PieChart3D {
public static void main( String[ ] args )throws Exception {
DefaultPieDataset dataset = new DefaultPieDataset( );
dataset.setValue( "IPhone 5s" , new Double( 20 ) );
dataset.setValue( "SamSung Grand" , new Double( 20 ) );
dataset.setValue( "MotoG" , new Double( 40 ) );
dataset.setValue( "Nokia Lumia" , new Double( 10 ) );
JFreeChart chart = ChartFactory.createPieChart3D(
"Mobile Sales" , // chart title
dataset ,
// data
true ,
// include legend
true,
false);
final PiePlot3D plot = ( PiePlot3D ) chart.getPlot( );
plot.setStartAngle( 270 );
plot.setForegroundAlpha( 0.60f );
plot.setInteriorGap( 0.02 );
int width = 640;
/* Width of the image */
int height = 480; /* Height of the image */
File pieChart3D = new File( "pie_Chart3D.jpeg" );
ChartUtilities.saveChartAsJPEG( pieChart3D , chart , width , height );
}
}
Let us keep the above Java code in PieChart3D.java file, and then compile and run it from
the command prompted as −
$javac PieChart3D.java
$java PieChart3D
If everything is fine, it will compile and run to create a JPEG image file named
PieChart3D.jpeg having the following 3D Pie Chart −
3D Bar Chart
A 3D Bar chart is same as the bar chart additionally with a nice 3D effect. A 3D effect can
achieved by adding a little extra code, which will take care of creating 3D effect in a bar
chart. Consider the following example that depicts various car statistics with the help of a
3D bar chart. Following is a list of car brands along with their different characteristics,
which we will show using a bar chart −
Car
Speed
User Rating
Millage
Safety
FIAT
1.0
3.0
5.0
5.0
AUDI
5.0
6.0
10.0
4.0
FORD
4.0
2.0
3.0
6.0
The following code creates 3D Bar Chart from the above given information. This code helps
you to embed a bar chart in any AWT based application.
import java.io.*;
import
import
import
import
import
org.jfree.chart.ChartFactory;
org.jfree.chart.JFreeChart;
org.jfree.chart.plot.PlotOrientation;
org.jfree.data.category.DefaultCategoryDataset;
org.jfree.chart.ChartUtilities;
public class BarChart3D {
public static void main( String[ ] args )throws Exception {
final String fait = "FAIT";
final String audi = "AUDI";
final String ford = "FORD";
final String speed = "Speed";
final String popular = "Popular";
final String mailage = "Mailage";
final String userrating = "User Rating";
final String safety = "safety";
final DefaultCategoryDataset dataset = new DefaultCategoryDataset( );
dataset.addValue(
dataset.addValue(
dataset.addValue(
dataset.addValue(
dataset.addValue(
1.0
4.0
3.0
5.0
5.0
,
,
,
,
,
dataset.addValue(
dataset.addValue(
dataset.addValue(
dataset.addValue(
dataset.addValue(
5.0 , audi , speed );
7.0 , audi , popular );
6.0 , audi , userrating );
10.0 , audi , mailage );
4.0 , audi , safety );
dataset.addValue(
dataset.addValue(
dataset.addValue(
dataset.addValue(
dataset.addValue(
4.0
3.0
2.0
3.0
6.0
,
,
,
,
,
fait
fait
fait
fait
fait
ford
ford
ford
ford
ford
,
,
,
,
,
,
,
,
,
,
speed );
popular );
userrating );
mailage );
safety );
speed );
popular );
userrating );
mailage );
safety );
JFreeChart barChart = ChartFactory.createBarChart3D(
"Car Usage Statistics",
"Category",
"Score",
dataset,
PlotOrientation.VERTICAL,
true, true, false);
int width = 640; /* Width of the image */
int height = 480; /* Height of the image */
File barChart3D = new File( "barChart3D.jpeg" );
ChartUtilities.saveChartAsJPEG( barChart3D, barChart, width, height);
}
}
Let us keep the above Java code in BarChart3D.java file, and then compile and run it
from the command prompted as −
$javac BarChart3D.java
$java BarChart3
If everything is fine with your environment, it will compile and run to create a JPEG image
file BarChart3D.jpeg having the following 3D Bar Chart −
JFreeChart - Bubble Chart
This chapter demonstrates how you can use JFreeChart to create Bubble Chart from a
given set of business data. A bubble chart displays information in three-dimensional way. A
bubble is plotted at the place where (x, y) coordinate intersect. The size of the bubble is
considered as range or quantity of X and Y axis.
Business Data
Let us consider different persons along with their age, weight, and work capacities. The
wok capacity can be treated as number of hours that is plotted as bubbles in the chart.
WEIGHT
AGE
30
10
20
30
40
50
60
40
50
60
70
80
4
WORK
5
10
8
9
6
AWT Based Application
Following is the code to create Bubble Chart from the above given information. This code
helps you to embed a Bubble chart in any AWT based application.
import java.awt.Color;
import java.awt.Dimension;
import javax.swing.JPanel;
import
import
import
import
import
import
import
import
import
org.jfree.chart.*;
org.jfree.chart.axis.NumberAxis;
org.jfree.chart.plot.PlotOrientation;
org.jfree.chart.plot.XYPlot;
org.jfree.chart.renderer.xy.XYItemRenderer;
org.jfree.data.xy.DefaultXYZDataset;
org.jfree.data.xy.XYZDataset;
org.jfree.ui.ApplicationFrame;
org.jfree.ui.RefineryUtilities;
public class BubbleChart_AWT extends ApplicationFrame {
public BubbleChart_AWT( String s ) {
super( s );
JPanel jpanel = createDemoPanel( );
jpanel.setPreferredSize(new Dimension( 560 , 370 ) );
setContentPane( jpanel );
}
private static JFreeChart createChart( XYZDataset xyzdataset ) {
JFreeChart jfreechart = ChartFactory.createBubbleChart(
"AGE vs WEIGHT vs WORK",
"Weight",
"AGE",
xyzdataset,
PlotOrientation.HORIZONTAL,
true, true, false);
XYPlot xyplot = ( XYPlot )jfreechart.getPlot( );
xyplot.setForegroundAlpha( 0.65F );
XYItemRenderer xyitemrenderer = xyplot.getRenderer( );
xyitemrenderer.setSeriesPaint( 0 , Color.blue );
NumberAxis numberaxis = ( NumberAxis )xyplot.getDomainAxis( );
numberaxis.setLowerMargin( 0.2 );
numberaxis.setUpperMargin( 0.5 );
NumberAxis numberaxis1 = ( NumberAxis )xyplot.getRangeAxis( );
numberaxis1.setLowerMargin( 0.8 );
numberaxis1.setUpperMargin( 0.9 );
return jfreechart;
}
public static XYZDataset createDataset( ) {
DefaultXYZDataset defaultxyzdataset = new DefaultXYZDataset();
double ad[ ] = { 30 , 40 , 50 , 60 , 70 , 80 };
double ad1[ ] = { 10 , 20 , 30 , 40 , 50 , 60 };
double ad2[ ] = { 4 , 5 , 10 , 8 , 9 , 6 };
double ad3[][] = { ad , ad1 , ad2 };
defaultxyzdataset.addSeries( "Series 1" , ad3 );
return defaultxyzdataset;
}
public static JPanel createDemoPanel( ) {
JFreeChart jfreechart = createChart( createDataset( ) );
ChartPanel chartpanel = new ChartPanel( jfreechart );
chartpanel.setDomainZoomable( true );
chartpanel.setRangeZoomable( true );
return chartpanel;
}
public static void main( String args[ ] ) {
BubbleChart_AWT bubblechart = new BubbleChart_AWT( "Bubble Chart_frame" );
bubblechart.pack( );
RefineryUtilities.centerFrameOnScreen( bubblechart );
bubblechart.setVisible( true );
}
}
Let us keep the above Java code in BubbleChart_AWT.java file, and then compile and
run it from the command prompted as −
$javac BubbleChart_AWT.java
$java BubbleChart_AW
If everything is fine, it will compile and run to generate the following Bubble Graph −
JPEG Image Creation
Let us re-write the above example to generate a JPEG image from a command line.
import java.io.*;
import java.awt.Color;
import
import
import
import
import
import
import
org.jfree.chart.*;
org.jfree.chart.axis.NumberAxis;
org.jfree.chart.plot.PlotOrientation;
org.jfree.chart.plot.XYPlot;
org.jfree.chart.renderer.xy.XYItemRenderer;
org.jfree.data.xy.DefaultXYZDataset;
org.jfree.chart.ChartUtilities;
public class BubbleChart_image {
public static void main( String args[ ] )throws Exception {
DefaultXYZDataset defaultxyzdataset = new DefaultXYZDataset( );
double ad[ ] = { 30 , 40 , 50 , 60 , 70 , 80 };
double ad1[ ] = { 10 , 20 , 30 , 40 , 50 , 60 };
double ad2[ ] = { 4 , 5 , 10 , 8 , 9 , 6 };
double ad3[ ][ ] = { ad , ad1 , ad2 };
defaultxyzdataset.addSeries( "Series 1" , ad3 );
JFreeChart jfreechart = ChartFactory.createBubbleChart(
"AGE vs WEIGHT vs WORK",
"Weight",
"AGE",
defaultxyzdataset,
PlotOrientation.HORIZONTAL,
true, true, false);
XYPlot xyplot = ( XYPlot )jfreechart.getPlot( );
xyplot.setForegroundAlpha( 0.65F );
XYItemRenderer xyitemrenderer = xyplot.getRenderer( );
xyitemrenderer.setSeriesPaint( 0 , Color.blue );
NumberAxis numberaxis = ( NumberAxis )xyplot.getDomainAxis( );
numberaxis.setLowerMargin( 0.2 );
numberaxis.setUpperMargin( 0.5 );
NumberAxis numberaxis1 = ( NumberAxis )xyplot.getRangeAxis( );
numberaxis1.setLowerMargin( 0.8 );
numberaxis1.setUpperMargin( 0.9 );
int width = 560;
/* Width of the image */
int height = 370; /* Height of the image */
File bubbleChart = new File("BubbleChart.jpeg");
ChartUtilities.saveChartAsJPEG(bubbleChart,jfreechart,width,height);
}
}
Let us keep the above Java code in BubbleChart_image.java file, and then compile and
run it from the command prompted as −
$javac BubbleChart_image.java
$java BubbleChart_image
If everything is fine, it will compile and run to create a JPEG image file named
BubbleChart.jpeg in your current directory.
JFreeChart - TimeSeries Chart
A time series chart displays sequence of data points, which varies at equal intervals of
time. This chapter demonstrates — how we can use JFreeChart to create Time Series
Chart from a given set of business data.
Business Data
Let us consider various random numbers generated by using standard Java API
Math.random(). We use these numbers to generate a Time Series Chart. You can
generate similar chart for total number of errors occurring in your website at a given
interval of time.
AWT Based Application
Following is the code to create Time Series Chart from the numbers generated by
Math.random() at a given time internal.
import
import
import
import
import
import
import
import
import
import
org.jfree.chart.ChartFactory;
org.jfree.chart.ChartPanel;
org.jfree.chart.JFreeChart;
org.jfree.data.general.SeriesException;
org.jfree.data.time.Second;
org.jfree.data.time.TimeSeries;
org.jfree.data.time.TimeSeriesCollection;
org.jfree.data.xy.XYDataset;
org.jfree.ui.ApplicationFrame;
org.jfree.ui.RefineryUtilities;
public class TimeSeries_AWT extends ApplicationFrame {
public TimeSeries_AWT( 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( 560 , 370 ) );
chartPanel.setMouseZoomable( true , false );
setContentPane( chartPanel );
}
private XYDataset createDataset( ) {
final TimeSeries series = new TimeSeries( "Random Data" );
Second current = new Second( );
double value = 100.0;
for (int i = 0; i < 4000; i++) {
try {
value = value + Math.random( ) - 0.5;
series.add(current, new Double( value ) );
current = ( Second ) current.next( );
} catch ( SeriesException e ) {
System.err.println("Error adding to series");
}
}
return new TimeSeriesCollection(series);
}
private JFreeChart createChart( final XYDataset dataset ) {
return ChartFactory.createTimeSeriesChart(
"Computing Test",
"Seconds",
"Value",
dataset,
false,
false,
false);
}
public static void main( final String[ ] args ) {
final String title = "Time Series Management";
final TimeSeries_AWT demo = new TimeSeries_AWT( title );
demo.pack( );
RefineryUtilities.positionFrameRandomly( demo );
demo.setVisible( true );
}
}
Let us keep the above Java code in TimeSeries_AWT.java file, and then compile and run
it from the command prompted as −
$javac TimeSeries_AWT.java
$java TImeSeries_AWT
If everything is fine, it will compile and run to generate the following Time Series Graph −
JPEG Image Creation
Let us re-write the above example to generate a JPEG image from a command line.
import java.io.*;
import
import
import
import
import
import
import
import
org.jfree.chart.ChartFactory;
org.jfree.chart.JFreeChart;
org.jfree.data.general.SeriesException;
org.jfree.data.time.Second;
org.jfree.data.time.TimeSeries;
org.jfree.data.time.TimeSeriesCollection;
org.jfree.data.xy.XYDataset;
org.jfree.chart.ChartUtilities;
public class TimeSeriesChart {
public static void main( final String[ ] args )throws Exception {
final TimeSeries series = new TimeSeries( "Random Data" );
Second current = new Second();
double value = 100.0;
for ( int i = 0 ; i < 4000 ; i++ ) {
try {
value = value + Math.random( ) - 0.5;
series.add( current , new Double( value ) );
current = ( Second ) current.next( );
} catch ( SeriesException e ) {
System.err.println( "Error adding to series" );
}
}
final XYDataset dataset=( XYDataset )new TimeSeriesCollection(series);
JFreeChart timechart = ChartFactory.createTimeSeriesChart(
"Computing Test",
"Seconds",
"Value",
dataset,
false,
false,
false);
int width = 560;
/* Width of the image */
int height = 370; /* Height of the image */
File timeChart = new File( "TimeChart.jpeg" );
ChartUtilities.saveChartAsJPEG( timeChart, timechart, width, height );
}
}
Let us keep the above Java code in TimeSeriesChart.java file, and then compile and run
it from the command prompted as −
$javac TimeSeriesChart.java
$java TimeSeriesChart
If everything is fine with your environment, it will compile and run to create a JPEG image
file TimeChart.jpeg file in your current directory.
JFreeChart - File Interface
So far we studied how to create various types of charts using JFreeChart APIs using static
data. But in production environment, data is provided in the form of text file with a
predefined format, or it comes directly from the database.
This chapter will explain — how we can read a simple data from a given text file from a
given location and then use JFreeChart to create a chart of your choice.
Business Data
Consider we have a file named mobile.txt, having different mobile brands and their sale
(units per day) separated by a simple comma (,) −
Iphone 5S, 20
Samsung Grand, 20
MOTO G, 40
Nokia
Lumia, 10
Chart Generation Based on File
Following is the code to create a Pie Chart based on the information provided in mobile.txt
−
import java.io.*;
import java.util.StringTokenizer;
import
import
import
import
org.jfree.chart.ChartUtilities;
org.jfree.chart.ChartFactory;
org.jfree.chart.JFreeChart;
org.jfree.data.general.DefaultPieDataset;
public class PieChart_File {
public static void main( String[ ] args )throws Exception {
String mobilebrands[ ] = {
"IPhone 5s" ,
"SamSung Grand" ,
"MotoG" ,
"Nokia Lumia"
};
InputStream in = new FileInputStream( new File( "C:/temp/test.txt" ) );
BufferedReader reader = new BufferedReader(new InputStreamReader(in ) );
StringBuilder out = new StringBuilder();
String line;
DefaultPieDataset dataset = new DefaultPieDataset();
while (( line = reader.readLine() ) != null ) {
out.append( line );
}
StringTokenizer s = new StringTokenizer( out.toString(), "," );
int i = 0;
while( s.hasMoreTokens( ) && ( mobilebrands [i] != null ) ) {
dataset.setValue(mobilebrands[i], Double.parseDouble( s.nextToken( ) ));
i++;
}
JFreeChart chart = ChartFactory.createPieChart(
"Mobile Sales",
// chart title
dataset,
// data
true,
// include legend
true,
false);
int width = 560;
/* Width of the image */
int height = 370;
/* Height of the image */
File pieChart = new File( "pie_Chart.jpeg" );
ChartUtilities.saveChartAsJPEG( pieChart, chart, width, height);
}
}
Let us keep the above Java code in PieChart_File.java file, and then compile and run it
from the command prompted as −
$javac PieChart_File.java
$java PieChart_File
If everything is fine, it will compile and run to create a JPEG image file named
PieChart.jpeg that contains the following chart.
JFreeChart - Database Interface
This chapter explains how you can read simple data from a database table and then use
JFreeChart to create a chart of your choice.
Business Data
Consider we have the following MySQL table mobile_tbl(mobile_brand VARCHAR(100) NOT
NULL, unit_sale INT NO NULL);
Consider this table is having the following records −
Mobile Brands
Unit Sales
IPhone5S
20
Samsung Grand
20
MotoG
40
Nokia Lumia
10
Chart Generation Using Database
Following is the code to create a Pie Chart based on the information provided in mobile_tbl
table available in test_db in a MySQL database. Based on your requirements, you can use
any other database.
import java.io.*;
import java.sql.*;
import
import
import
import
org.jfree.chart.ChartUtilities;
org.jfree.chart.ChartFactory;
org.jfree.chart.JFreeChart;
org.jfree.data.general.DefaultPieDataset;
public class PieChart_DB {
public static void main( String[ ] args )throws Exception {
String mobilebrands[] = {
"IPhone 5s",
"SamSung Grand",
"MotoG",
"Nokia Lumia"
};
/* Create MySQL Database Connection */
Class.forName( "com.mysql.jdbc.Driver" );
Connection connect = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/jf_testdb" ,
"root",
"root123");
Statement statement = connect.createStatement( );
ResultSet resultSet = statement.executeQuery("select * from mobile_data" );
DefaultPieDataset dataset = new DefaultPieDataset( );
while( resultSet.next( ) ) {
dataset.setValue(
resultSet.getString( "mobile_brand" ) ,
Double.parseDouble( resultSet.getString( "unit_sale" )));
}
JFreeChart chart = ChartFactory.createPieChart(
"Mobile Sales",
// chart title
dataset,
// data
true,
// include legend
true,
false );
int width = 560;
/* Width of the image */
int height = 370;
/* Height of the image */
File pieChart = new File( "Pie_Chart.jpeg" );
ChartUtilities.saveChartAsJPEG( pieChart , chart , width , height );
}
}
Let us keep the above Java code in PieChart_DB.java file, and then compile and run it
from the command prompted as −
$javac PieChart_DB.java
$java PieChart_DB
If everything is fine, it will compile and run to create a JPEG image file named
Pie_Chart.jpeg having the following chart.
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