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JFreeChart is a free Java class library for generating charts, including pie charts, bar graphs, Gannt charts and more...

A basic performance test for a couple of common operations
Code:


/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2004, 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., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ----------------
* Performance.java
* ----------------
* (C) Copyright 2002-2004, by Object Refinery Limited.
*
* Original Author:  David Gilbert (for Object Refinery Limited).
* Contributor(s):   -;
*
* $Id: Performance.java,v 1.10 2004/04/26 19:12:00 taqua Exp $
*
* Changes (since 11-Oct-2002)
* ---------------------------
* 11-Oct-2002 : Fixed errors reported by Checkstyle (DG);
*
*/
        package org.jfree.chart.demo;

import java.awt.geom.Line2D;
import java.util.Date;

/**
 * A basic performance test for a couple of common operations.
 */
public class Performance {

    /**
     * The value.
     */
    private double value = 2.0;

    /**
     * The number.
     */
    private Double number = new Double(this.value);

    /**
     * Default constructor.
     */
    public Performance() {
        super();
    }

    /**
     * Creates lines in a loop.
     *
     * @param count the number of lines to create.
     */
    public void createLines(final int count) {

        Line2D line = new Line2D.Double();
        for (int i = 0; i < count; i++) {
            line = new Line2D.Double(1.0, 1.0, 1.0, 1.0);
        }
        System.out.println(line.toString());

    }

    /**
     * Creates one line, then repeatedly calls the setLine method.
     *
     * @param count the number of times to call the setLine method.
     */
    public void setLines(final int count) {

        final Line2D line = new Line2D.Double(0.0, 0.0, 0.0, 0.0);
        for (int i = 0; i < count; i++) {
            line.setLine(1.0, 1.0, 1.0, 1.0);
        }

    }

    /**
     * Repeatedly grabs a value from a Number instance.
     *
     * @param count the number of times to call doubleValue().
     */
    public void getNumber(final int count) {

        double d = 0.0;
        for (int i = 0; i < count; i++) {
            d = this.number.doubleValue();
        }
        System.out.println(d);

    }

    /**
     * Repeatedly grabs a value from a double.
     *
     * @param count the number of times to fetch the value.
     */
    public void getValue(final int count) {

        double d = 0.0;
        for (int i = 0; i < count; i++) {
            d = this.value;
        }
        System.out.println(d);

    }

    /**
     * Writes the current time to the console.
     *
     * @param text the prefix.
     * @param time the time.
     */
    public void writeTime(final String text, final Date time) {

        System.out.println(text + " : " + time.getTime());

    }

    /**
     * Starting point for the application.
     *
     * @param args ignored.
     */
    public static void main(final String[] args) {

        final Performance p = new Performance();
        System.out.println("Simple performance tests.");

        final Date start1 = new Date();
        p.createLines(100000);
        final Date end1 = new Date();

        final Date start2 = new Date();
        p.setLines(100000);
        final Date end2 = new Date();

        p.writeTime("Start create lines", start1);
        p.writeTime("Finish create lines", end1);
        p.writeTime("Start set lines", start2);
        p.writeTime("Finish set lines", end2);

        final Date start3 = new Date();
        p.getNumber(1000000);
        final Date end3 = new Date();

        final Date start4 = new Date();
        p.getValue(1000000);
        final Date end4 = new Date();

        p.writeTime("Start get number", start3);
        p.writeTime("Finish get number", end3);
        p.writeTime("Start get value", start4);
        p.writeTime("Finish get value", end4);


    }

}


Code:


A basic performance test for a couple of common operations

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2004, 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., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * ----------------
 * Performance.java
 * ----------------
 * (C) Copyright 2002-2004, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited).
 * Contributor(s):   -;
 *
 * $Id: Performance.java,v 1.10 2004/04/26 19:12:00 taqua Exp $
 *
 * Changes (since 11-Oct-2002)
 * ---------------------------
 * 11-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 *
 */
        package org.jfree.chart.demo;

import java.awt.geom.Line2D;
import java.util.Date;

/**
 * A basic performance test for a couple of common operations.
 */
public class Performance {

    /**
     * The value.
     */
    private double value = 2.0;

    /**
     * The number.
     */
    private Double number = new Double(this.value);

    /**
     * Default constructor.
     */
    public Performance() {
        super();
    }

    /**
     * Creates lines in a loop.
     *
     * @param count the number of lines to create.
     */
    public void createLines(final int count) {

        Line2D line = new Line2D.Double();
        for (int i = 0; i < count; i++) {
            line = new Line2D.Double(1.0, 1.0, 1.0, 1.0);
        }
        System.out.println(line.toString());

    }

    /**
     * Creates one line, then repeatedly calls the setLine method.
     *
     * @param count the number of times to call the setLine method.
     */
    public void setLines(final int count) {

        final Line2D line = new Line2D.Double(0.0, 0.0, 0.0, 0.0);
        for (int i = 0; i < count; i++) {
            line.setLine(1.0, 1.0, 1.0, 1.0);
        }

    }

    /**
     * Repeatedly grabs a value from a Number instance.
     *
     * @param count the number of times to call doubleValue().
     */
    public void getNumber(final int count) {

        double d = 0.0;
        for (int i = 0; i < count; i++) {
            d = this.number.doubleValue();
        }
        System.out.println(d);

    }

    /**
     * Repeatedly grabs a value from a double.
     *
     * @param count the number of times to fetch the value.
     */
    public void getValue(final int count) {

        double d = 0.0;
        for (int i = 0; i < count; i++) {
            d = this.value;
        }
        System.out.println(d);

    }

    /**
     * Writes the current time to the console.
     *
     * @param text the prefix.
     * @param time the time.
     */
    public void writeTime(final String text, final Date time) {

        System.out.println(text + " : " + time.getTime());

    }

    /**
     * Starting point for the application.
     *
     * @param args ignored.
     */
    public static void main(final String[] args) {

        final Performance p = new Performance();
        System.out.println("Simple performance tests.");

        final Date start1 = new Date();
        p.createLines(100000);
        final Date end1 = new Date();

        final Date start2 = new Date();
        p.setLines(100000);
        final Date end2 = new Date();

        p.writeTime("Start create lines", start1);
        p.writeTime("Finish create lines", end1);
        p.writeTime("Start set lines", start2);
        p.writeTime("Finish set lines", end2);

        final Date start3 = new Date();
        p.getNumber(1000000);
        final Date end3 = new Date();

        final Date start4 = new Date();
        p.getValue(1000000);
        final Date end4 = new Date();

        p.writeTime("Start get number", start3);
        p.writeTime("Finish get number", end3);
        p.writeTime("Start get value", start4);
        p.writeTime("Finish get value", end4);


    }

}



Chart Timing Four

Code:


/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2004, 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., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * -----------------
 * ChartTiming4.java
 * -----------------
 * (C) Copyright 2002-2004, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: ChartTiming4.java,v 1.16 2004/04/26 19:11:53 taqua Exp $
 *
 * Changes
 * -------
 * 29-Oct-2002 : Version 1 (DG);
 *
 */

        package org.jfree.chart.demo;

import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;

import javax.swing.Timer;

import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.FastScatterPlot;
import org.jfree.chart.plot.Plot;

/**
 * Draws a scatter plot over and over for 10 seconds.  Reports on how many redraws were achieved.
 * <p/>
 * On my PC (SuSE Linux 8.2, JDK 1.4, 256mb RAM, 2.66ghz Pentium) I get 31 charts per second.
 */
public class ChartTiming4 implements ActionListener {

    /**
     * A flag that indicates when time is up.
     */
    private boolean finished;

    /**
     * Storage for the data.
     */
    private float[][] data = new float[2][1440];

    /**
     * Creates a new application.
     */
    public ChartTiming4() {
        // nothing to do
    }

    /**
     * Runs the test.
     */
    public void run() {

        this.finished = false;

        // create a dataset...
        populateData();

        // create a fast scatter chart...
        final Plot plot = new FastScatterPlot(this.data, new NumberAxis("X"), new NumberAxis("Y"));
        final JFreeChart chart = new JFreeChart(
                "Fast Scatter Plot Timing",
                JFreeChart.DEFAULT_TITLE_FONT,
                plot,
                true
        );

        final BufferedImage image = new BufferedImage(400, 300, BufferedImage.TYPE_INT_RGB);
        final Graphics2D g2 = image.createGraphics();
        final Rectangle2D chartArea = new Rectangle2D.Double(0, 0, 400, 300);

        // set up the timer...
        final Timer timer = new Timer(10000, this);
        timer.setRepeats(false);
        int count = 0;
        timer.start();
        while (!this.finished) {
            chart.draw(g2, chartArea, null, null);
            System.out.println("Charts drawn..." + count);
            if (!this.finished) {
                count++;
            }
        }
        System.out.println("DONE");

    }

    /**
     * Receives notification of action events (in this case, from the Timer).
     *
     * @param event the event.
     */
    public void actionPerformed(final ActionEvent event) {
        this.finished = true;
    }

    /**
     * Populates the data array with random values.
     */
    private void populateData() {

        for (int i = 0; i < this.data[0].length; i++) {

            final float x = i;
            this.data[0][i] = x;
            this.data[1][i] = 100 + (2 * x) + (float) Math.random() * 1440;
        }

    }

    /**
     * Starting point for the application.
     *
     * @param args ignored.
     */
    public static void main(final String[] args) {

        final ChartTiming4 app = new ChartTiming4();
        app.run();

    }

}


Chart Timing three

Code:


/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2004, 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., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * -----------------
 * ChartTiming3.java
 * -----------------
 * (C) Copyright 2002-2004, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: ChartTiming3.java,v 1.15 2004/04/26 19:11:53 taqua Exp $
 *
 * Changes
 * -------
 * 29-Oct-2002 : Version 1 (DG);
 *
 */

        package org.jfree.chart.demo;

import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;

import javax.swing.Timer;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYDotRenderer;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;

/**
 * Draws a scatter plot over and over for 10 seconds.  Reports on how many redraws were achieved.
 * <p/>
 * On my PC (SuSE Linux 8.2, JDK 1.4, 256mb RAM, 2.66ghz Pentium) I get 13-14 charts per second.
 */
public class ChartTiming3 implements ActionListener {

    /**
     * A flag that indicates when time is up.
     */
    private boolean finished;

    /**
     * Creates a new application.
     */
    public ChartTiming3() {
        // nothing to do
    }

    /**
     * Runs the test.
     */
    public void run() {

        this.finished = false;

        // create a dataset...
        final XYSeries series = new XYSeries("Random Data");
        for (int i = 0; i < 1440; i++) {
            final double x = Math.random();
            final double y = Math.random();
            series.add(x, y);
        }
        final XYDataset data = new XYSeriesCollection(series);

        // create a scatter chart...
        final boolean withLegend = true;
        final JFreeChart chart = ChartFactory.createScatterPlot(
                "Scatter plot timing", "X", "Y",
                data,
                PlotOrientation.VERTICAL,
                withLegend,
                false,
                false
        );

        final XYPlot plot = chart.getXYPlot();
        plot.setRenderer(new XYDotRenderer());

        final BufferedImage image = new BufferedImage(400, 300, BufferedImage.TYPE_INT_RGB);
        final Graphics2D g2 = image.createGraphics();
        final Rectangle2D chartArea = new Rectangle2D.Double(0, 0, 400, 300);

        // set up the timer...
        final Timer timer = new Timer(10000, this);
        timer.setRepeats(false);
        int count = 0;
        timer.start();
        while (!this.finished) {
            chart.draw(g2, chartArea, null, null);
            System.out.println("Charts drawn..." + count);
            if (!this.finished) {
                count++;
            }
        }
        System.out.println("DONE");

    }

    /**
     * Receives notification of action events (in this case, from the Timer).
     *
     * @param event the event.
     */
    public void actionPerformed(final ActionEvent event) {
        this.finished = true;
    }

    /**
     * Starting point for the application.
     *
     * @param args ignored.
     */
    public static void main(final String[] args) {

        final ChartTiming3 app = new ChartTiming3();
        app.run();

    }

}
 
 



References.

The list of classes which were used on this page you can find below. The links to Java API contain official SUN documentation about all used classes.

  java.awt.Graphics2D

  java.lang.Object

  java.lang.Double

  javax.sound.sampled.Line

  java.lang.Number

  java.sql.Date

  java.awt.event.ActionListener

  java.awt.image.BufferedImage

  java.awt.Graphics

  java.awt.Rectangle

  java.util.Timer

  java.awt.event.ActionEvent

  java.util.Random




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