samplexydataset2.java

JfreeChart 常用图表例子

/* ===========================================================
 * 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.]
 *
 * ---------------------
 * SampleXYDataset2.java
 * ---------------------
 * (C) Copyright 2000-2004, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: SampleXYDataset2.java,v 1.7 2004/05/06 08:14:33 mungady Exp $
 *
 * Changes
 * -------
 * 22-Oct-2001 : Version 1 (DG);
 *               Renamed DataSource.java --> Dataset.java etc. (DG);
 * 07-Nov-2001 : Updated source header (DG);
 * 11-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 29-Oct-2002 : Modified so that you can specify dataset parameters in the constructor (DG);
 * 06-May-2004 : Now implements AbstractXYDataset (DG);
 *
 */

package org.jfree.chart.demo;

import org.jfree.data.DomainInfo;
import org.jfree.data.Range;
import org.jfree.data.RangeInfo;
import org.jfree.data.xy.AbstractXYDataset;
import org.jfree.data.xy.XYDataset;

/**
 * Random data for a scatter plot demo.
 * <P>
 * Note that the aim of this class is to create a self-contained data source for demo purposes -
 * it is NOT intended to show how you should go about writing your own datasets.
 *
 */
public class SampleXYDataset2 extends AbstractXYDataset implements XYDataset,
                                                                   DomainInfo, 
                                                                   RangeInfo {

    /** The series count. */
    private static final int DEFAULT_SERIES_COUNT = 4;

    /** The item count. */
    private static final int DEFAULT_ITEM_COUNT = 100;

    /** The range. */
    private static final double DEFAULT_RANGE = 200;

    /** The x values. */
    private Double[][] xValues;

    /** The y values. */
    private Double[][] yValues;

    /** The number of series. */
    private int seriesCount;

    /** The number of items. */
    private int itemCount;

    /** The minimum domain value. */
    private Number domainMin;

    /** The maximum domain value. */
    private Number domainMax;

    /** The minimum range value. */
    private Number rangeMin;

    /** The maximum range value. */
    private Number rangeMax;

    /** The range of the domain. */
    private Range domainRange;

    /** The range. */
    private Range range;

    /**
     * Creates a sample dataset using default settings (4 series, 100 data items per series,
     * random data in the range 0 - 200).
     */
    public SampleXYDataset2() {
        this(DEFAULT_SERIES_COUNT, DEFAULT_ITEM_COUNT);
    }

    /**
     * Creates a sample dataset.
     *
     * @param seriesCount  the number of series.
     * @param itemCount  the number of items.
     */
    public SampleXYDataset2(final int seriesCount, final int itemCount) {

        this.xValues = new Double[seriesCount][itemCount];
        this.yValues = new Double[seriesCount][itemCount];
        this.seriesCount = seriesCount;
        this.itemCount = itemCount;

        double minX = Double.POSITIVE_INFINITY;
        double maxX = Double.NEGATIVE_INFINITY;
        double minY = Double.POSITIVE_INFINITY;
        double maxY = Double.NEGATIVE_INFINITY;

        for (int series = 0; series < seriesCount; series++) {
            for (int item = 0; item < itemCount; item++) {

                final double x = (Math.random() - 0.5) * DEFAULT_RANGE;
                this.xValues[series][item] = new Double(x);
                if (x < minX) {
                    minX = x;
                }
                if (x > maxX) {
                    maxX = x;
                }

                final double y = (Math.random() + 0.5) * 6 * x + x;
                this.yValues[series][item] = new Double(y);
                if (y < minY) {
                    minY = y;
                }
                if (y > maxY) {
                    maxY = y;
                }

            }
        }

        this.domainMin = new Double(minX);
        this.domainMax = new Double(maxX);
        this.domainRange = new Range(minX, maxX);

        this.rangeMin = new Double(minY);
        this.rangeMax = new Double(maxY);
        this.range = new Range(minY, maxY);

    }

    /**
     * Returns the x-value for the specified series and item.  Series are numbered 0, 1, ...
     *
     * @param series  the index (zero-based) of the series.
     * @param item  the index (zero-based) of the required item.
     *
     * @return the x-value for the specified series and item.
     */
    public double getXValue(final int series, final int item) {
        return this.xValues[series][item].doubleValue();
    }

    /**
     * Returns the y-value for the specified series and item.  Series are numbered 0, 1, ...
     *
     * @param series  the index (zero-based) of the series.
     * @param item  the index (zero-based) of the required item.
     *
     * @return  the y-value for the specified series and item.
     */
    public double getYValue(final int series, final int item) {
        return this.yValues[series][item].doubleValue();
    }

    /**
     * Returns the number of series in the dataset.
     *
     * @return the series count.
     */
    public int getSeriesCount() {
        return this.seriesCount;
    }

    /**
     * Returns the name of the series.
     *
     * @param series  the index (zero-based) of the series.
     *
     * @return the name of the series.
     */
    public String getSeriesName(final int series) {
        return "Sample " + series;
    }

    /**
     * Returns the number of items in the specified series.
     *
     * @param series  the index (zero-based) of the series.
     *
     * @return the number of items in the specified series.
     */
    public int getItemCount(final int series) {
        return this.itemCount;
    }

    /**
     * Returns the minimum domain value.
     *
     * @return the minimum domain value.
     */
    public Number getMinimumDomainValue() {
        return this.domainMin;
    }

    /**
     * Returns the maximum domain value.
     *
     * @return the maximum domain value.
     */
    public Number getMaximumDomainValue() {
        return this.domainMax;
    }

    /**
     * Returns the range of values in the domain.
     *
     * @return the range.
     */
    public Range getDomainRange() {
        return this.domainRange;
    }

    /**
     * Returns the minimum range value.
     *
     * @return the minimum range value.
     */
    public Number getMinimumRangeValue() {
        return this.rangeMin;
    }

    /**
     * Returns the maximum range value.
     *
     * @return the maximum range value.
     */
    public Number getMaximumRangeValue() {
        return this.rangeMax;
    }

    /**
     * Returns the range of values in the range (y-values).
     *
     * @return the range.
     */
    public Range getValueRange() {
        return this.range;
    }

	/* (non-Javadoc)
	 * @see org.jfree.data.general.AbstractSeriesDataset#getSeriesKey(int)
	 */
	public Comparable getSeriesKey(int series) {
		// TODO Auto-generated method stub
		return null;
	}

	/* (non-Javadoc)
	 * @see org.jfree.data.xy.XYDataset#getX(int, int)
	 */
	public Number getX(int series, int item) {
		// TODO Auto-generated method stub
		return null;
	}

	/* (non-Javadoc)
	 * @see org.jfree.data.xy.XYDataset#getY(int, int)
	 */
	public Number getY(int series, int item) {
		// TODO Auto-generated method stub
		return null;
	}

	/* (non-Javadoc)
	 * @see org.jfree.data.DomainInfo#getDomainLowerBound(boolean)
	 */
	public double getDomainLowerBound(boolean includeInterval) {
		// TODO Auto-generated method stub
		return 0;
	}

	/* (non-Javadoc)
	 * @see org.jfree.data.DomainInfo#getDomainUpperBound(boolean)
	 */
	public double getDomainUpperBound(boolean includeInterval) {
		// TODO Auto-generated method stub
		return 0;
	}

	/* (non-Javadoc)
	 * @see org.jfree.data.DomainInfo#getDomainBounds(boolean)
	 */
	public Range getDomainBounds(boolean includeInterval) {
		// TODO Auto-generated method stub
		return null;
	}

	/* (non-Javadoc)
	 * @see org.jfree.data.RangeInfo#getRangeLowerBound(boolean)
	 */
	public double getRangeLowerBound(boolean includeInterval) {
		// TODO Auto-generated method stub
		return 0;
	}

	/* (non-Javadoc)
	 * @see org.jfree.data.RangeInfo#getRangeUpperBound(boolean)
	 */
	public double getRangeUpperBound(boolean includeInterval) {
		// TODO Auto-generated method stub
		return 0;
	}

	/* (non-Javadoc)
	 * @see org.jfree.data.RangeInfo#getRangeBounds(boolean)
	 */
	public Range getRangeBounds(boolean includeInterval) {
		// TODO Auto-generated method stub
		return null;
	}

}