[jCharts-users] LineCharts Question multiple data series...

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Being a newbie to the JCharts, I am having difficulty getting a graph to =
correctly display multiple lines of data, and have not been able to find =
an example that does this.

I see http://jcharts.sourceforge.net/samples/line.html shows a sample, =
but no code is provided.

I have played/modifed the code from ComboChartServlet example, where I =
simplied added another data series, but this too fail, unless the second =
data series is configured to render using ChartType.BAR

The modified service method is shown below...

If I modify the one of the lines:

dataSeries.addIAxisPlotDataSet( new AxisChartDataSet( data, =
legendLabels, paints, ChartType.LINE, this.lineChartProperties ) );

to

dataSeries.addIAxisPlotDataSet( new AxisChartDataSet( data, =
legendLabels, paints, ChartType.BAR, this.barChartProperties ) );

it will render this series correctly as a bar chart, and the other as a =
line chart.  But I cannot get them both to render as lines..what gives?

I must be missing something....any suggestions would be greatly =
appreciated

--- service() method in question ----

public void service( HttpServletRequest req, HttpServletResponse =
httpServletResponse ) throws ServletException, IOException
	{
		try
		{
			String[] xAxisLabels =3D {"1995", "1996", "1997", "1998", "1999", =
"2000", "2001", "2002", "2003", "2004"};
			String xAxisTitle =3D "Years";
			String yAxisTitle =3D "Problems";
			String title =3D "Micro$oft At Work";
			IAxisDataSeries dataSeries =3D new DataSeries( xAxisLabels, =
xAxisTitle, yAxisTitle, title );

			double[][] data =3D new double[][]{{1500, 6880, 4510, 2600, 1200, =
1580, 8000, 4555, 4000, 6120}};
			double[][] data2 =3D new double[][]{{2500, 7880, 5510, 8600, 2200, =
2580, 9000, 5555, 3000, 1120}};
			String[] legendLabels =3D {"Bugs"};
			String[] legendLabels2 =3D {"tests"};
			Paint[] paints =3D new Paint[]{Color.blue.darker()};
			Paint[] linePaints =3D new Paint[]{Color.green};
			dataSeries.addIAxisPlotDataSet( new AxisChartDataSet( data, =
legendLabels, paints, ChartType.LINE, this.lineChartProperties ) );
			dataSeries.addIAxisPlotDataSet( new AxisChartDataSet( data2, =
legendLabels2, linePaints, ChartType.LINE, this.lineChartProperties ) );
			//dataSeries.addIAxisPlotDataSet( new AxisChartDataSet( data, =
legendLabels, linePaints, ChartType.LINE, this.lineChartProperties ) );

			AxisChart axisChart =3D new AxisChart( dataSeries, =
this.chartProperties, this.axisProperties, this.legendProperties, =
this.width, this.height );
			ServletEncoderHelper.encodeJPEG13( axisChart, 1.0f, =
httpServletResponse );
		}
		catch( Throwable throwable )
		{
			//HACK do your error handling here...
			throwable.printStackTrace();
		}
	}

----- full servlet code below -----
/************************************************************************=
***********************
 * File Info: $Id: ComboChartServlet.java,v 1.3 2003/03/14 03:23:23 =
nathaniel_auvil Exp $
 * Copyright (C) 2000
 * Author: Nathaniel G. Auvil
 * Contributor(s):
 *
 * Copyright 2002 (C) Nathaniel G. Auvil. All Rights Reserved.
 *
 * Redistribution and use of this software and associated documentation
 * ("Software"), with or without modification, are permitted provided
 * that the following conditions are met:
 *
 * 1. Redistributions of source code must retain copyright
 *    statements and notices.  Redistributions must also contain a
 *    copy of this document.
 *
 * 2. Redistributions in binary form must reproduce the
 *    above copyright notice, this list of conditions and the
 *    following disclaimer in the documentation and/or other
 *    materials provided with the distribution.
 *
 * 3. The name "jCharts" or "Nathaniel G. Auvil" must not be used to
 * 	  endorse or promote products derived from this Software without
 * 	  prior written permission of Nathaniel G. Auvil.  For written
 *    permission, please contact nat...@us...
 *
 * 4. Products derived from this Software may not be called "jCharts"
 *    nor may "jCharts" appear in their names without prior written
 *    permission of Nathaniel G. Auvil. jCharts is a registered
 *    trademark of Nathaniel G. Auvil.
 *
 * 5. Due credit should be given to the jCharts Project
 *    (http://jcharts.sourceforge.net/).
 *
 * THIS SOFTWARE IS PROVIDED BY Nathaniel G. Auvil AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 * jCharts OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 =
*************************************************************************=
***********************/

package org.jCharts.demo.simpleServlet;

import org.jCharts.axisChart.AxisChart;
import org.jCharts.chartData.AxisChartDataSet;
import org.jCharts.chartData.DataSeries;
import org.jCharts.chartData.interfaces.IAxisDataSeries;
import org.jCharts.encoders.ServletEncoderHelper;
import org.jCharts.properties.*;
import org.jCharts.properties.util.ChartFont;
import org.jCharts.types.ChartType;

import javax.servlet.ServletException;
import javax.servlet.http.*;
import java.awt.*;
import java.io.IOException;

public class ComboChartServlet extends HttpServlet
{
	//---all of my charts serviced by this Servlet will have the same =
properties.
	private LineChartProperties lineChartProperties;

	//---all of my charts serviced by this Servlet will have the same =
properties.
	private BarChartProperties barChartProperties;

	//---all of my charts serviced by this Servlet will have the same =
properties.
	protected LegendProperties legendProperties;
	protected AxisProperties axisProperties;
	protected ChartProperties chartProperties;

	protected int width =3D 550;
	protected int height =3D 360;

	=
/************************************************************************=
**********************
	 *
	 =
*************************************************************************=
*********************/
	public void init()
	{
		this.legendProperties =3D new LegendProperties();
		this.chartProperties =3D new ChartProperties();
		this.axisProperties =3D new AxisProperties( false );
		ChartFont axisScaleFont =3D new ChartFont( new Font( "Georgia Negreta =
cursiva", Font.PLAIN, 13 ), Color.black );
		axisProperties.getXAxisProperties().setScaleChartFont( axisScaleFont =
);
		axisProperties.getYAxisProperties().setScaleChartFont( axisScaleFont =
);

		ChartFont axisTitleFont =3D new ChartFont( new Font( "Arial Narrow", =
Font.PLAIN, 14 ), Color.black );
		axisProperties.getXAxisProperties().setTitleChartFont( axisTitleFont =
);
		axisProperties.getYAxisProperties().setTitleChartFont( axisTitleFont =
);

		ChartFont titleFont =3D new ChartFont( new Font( "Georgia Negreta =
cursiva", Font.PLAIN, 14 ), Color.black );
		this.chartProperties.setTitleFont( titleFont );

		Stroke[] strokes =3D {LineChartProperties.DEFAULT_LINE_STROKE};
		Shape[] shapes =3D {PointChartProperties.SHAPE_DIAMOND};
		this.lineChartProperties =3D new LineChartProperties( strokes, shapes =
);

		this.barChartProperties =3D new BarChartProperties();
	}

	=
/************************************************************************=
**********************
	 *
	 =
*************************************************************************=
*********************/
	public void service( HttpServletRequest req, HttpServletResponse =
httpServletResponse ) throws ServletException, IOException
	{
		try
		{
			String[] xAxisLabels =3D {"1995", "1996", "1997", "1998", "1999", =
"2000", "2001", "2002", "2003", "2004"};
			String xAxisTitle =3D "Years";
			String yAxisTitle =3D "Problems";
			String title =3D "Micro$oft At Work";
			IAxisDataSeries dataSeries =3D new DataSeries( xAxisLabels, =
xAxisTitle, yAxisTitle, title );

			double[][] data =3D new double[][]{{1500, 6880, 4510, 2600, 1200, =
1580, 8000, 4555, 4000, 6120}};
			double[][] data2 =3D new double[][]{{2500, 7880, 5510, 8600, 2200, =
2580, 9000, 5555, 3000, 1120}};
			String[] legendLabels =3D {"Bugs"};
			String[] legendLabels2 =3D {"tests"};
			Paint[] paints =3D new Paint[]{Color.blue.darker()};
			Paint[] linePaints =3D new Paint[]{Color.green};
			dataSeries.addIAxisPlotDataSet( new AxisChartDataSet( data, =
legendLabels, paints, ChartType.LINE, this.lineChartProperties ) );
//			dataSeries.addIAxisPlotDataSet( new AxisChartDataSet( data, =
legendLabels, paints, ChartType.BAR, this.barChartProperties ) );

			dataSeries.addIAxisPlotDataSet( new AxisChartDataSet( data2, =
legendLabels2, linePaints, ChartType.LINE, this.lineChartProperties ) );

			AxisChart axisChart =3D new AxisChart( dataSeries, =
this.chartProperties, this.axisProperties, this.legendProperties, =
this.width, this.height );
			ServletEncoderHelper.encodeJPEG13( axisChart, 1.0f, =
httpServletResponse );
		}
		catch( Throwable throwable )
		{
			//HACK do your error handling here...
			throwable.printStackTrace();
		}
	}
}