Upgrade from 2002 version of jFreeChart

[eselick]

Hi
I need to upgrade to the latest version which I have downloaded and am desperately trying to avoid a rewrite

I've added jcommon-1.0.23.jar and jfreechart-1.0.19.jar to my Netbeans project library.
I also tried replacing the following with the org.jfree equivalents as show below.

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/*
import com.jrefinery.data.*;
import com.jrefinery.chart.*;
import com.jrefinery.chart.ChartPanel;
import com.jrefinery.chart.data.*;
import com.jrefinery.chart.ui.*;
import com.jrefinery.layout.LCBLayout;
*/
import org.jfree.data.*;
import org.jfree.chart.*;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.data.*;
import org.jfree.chart.ui.*;
import org.jfree.layout.LCBLayout;

I'm getting "package does not exist" errors on these two lines:

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import org.jfree.chart.data.*;
import org.jfree.chart.ui.*;

How can I fix this?

Thanks in advance. I really appreciate the help.
Elliot

[paradoxoff]

How can I fix this?

By deleting the import statement!
PLease check what classes were imported from the com.jrefinery.chart.data and com.jrefinery.chart.ui packages. Then try to find them in the current package structure.

[eselick]

Hi

I've just purchased the developer guide but still need some help

The old code is creating a dataset using three array lists for the series, categories and data.
These are created before the dataset itself is created and and I would like to keep the existing code for that part.

Is there a way of creating a dataset in the same way with the new version of jFree?

The guts of the old code is shown below and I would like to get rid of the MyCategoryDataSet class and replace it with a simpler updated version.

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private ArrayList categories, series, dataAL, tmp_categories;
 
private CategoryDataset createCategoryDataSet() {
	return (new MyCategoryDataSet(generateSeries(series),
			generateCategory(tmp_categories),
			generateData(dataAL)));
}

The declaration for MycategoryDataset is as follows:

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public class MyCategoryDataSet extends AbstractSeriesDataset implements CategoryDataset {

    /** The series names. */
    protected String[] seriesNames;

    /** The categories. */
    protected Object[] categories;

    /** Storage for the data. */
    protected Number[][] data;
	/**
public MyCategoryDataSet(String[] seriesNames, Object[] categories, Number[][] data) {

Thanks
Elliot

[eselick]

Hi

I've decided to rewrite the routine that creates the dataset. The code has to parse a socket stream that is sending a tokenized list of rows and categories. I have the following declarations

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private DefaultCategoryDataset dataset;
private String dateTok;
private String seriesTtl;
private Integer intValue;

i'm getting a "nullpointer exception" when I execute the following line:

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dataset.addValue(intValue, seriesTtl, dateTok);

The three fields being passed into the addValue method are show in the Netbeans debugger as an Integer, a String and a String so I don't think that's the problem

Is there sometihng incorrect about using the addvalue method with a DefaultCategoryDataset? Will it only work with a CategoryDataset class?

I hope someone's out there to give a hand
Thanks
Elliot

[eselick]

Please forget the last post/question.The following should have been.

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 private  DefaultCategoryDataset dataset = new DefaultCategoryDataset();
not
 private  DefaultCategoryDataset datase;

It's been a while since I've done any Java but it's working now
Elliot