Eclipse RCP with JFreeChart

I'm trying yo use JFreeChart in RCP application with a simple view. I added JfreeChart jar file as a referenced library to project.

The view could not be created because of the error :

Could not create the view: Plug-in "ViewJFreeChart" was unable to instantiate class "viewJFreeChart.View".
java.lang.NoClassDefFoundError: org/jfree/data/general/PieDataset
    at java.lang.Class.getDeclaredConstructors0(Native Method)
    at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
    at java.lang.Class.getConstructor0(Unknown Source)
    at java.lang.Class.newInstance0(Unknown Source)
    at java.lang.Class.newInstance(Unknown Source)

......

This is the sorce code for View.java:

package viewJFreeChart;

import java.awt.Font;

import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.part.ViewPart;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PiePlot;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.general.PieDataset;
import org.jfree.experimental.chart.swt.ChartComposite;

public class View extends ViewPart {
    public static final String ID = "ViewJFreeChart.view";

    private TableViewer viewer;

    /**
     * This is a callback that will allow us to create the viewer and initialize
     * it.
     */
    public void createPartControl(Composite parent) {

     JFreeChart chart = createChart(createDataset());
     final ChartComposite frame = new ChartComposite(parent, SWT.NONE,
       chart, true);
    }

    /**
     * Passing the focus request to the viewer's control.
     */
    public void setFocus() {
     viewer.getControl().setFocus();
    }

    /**
     * Creates the Dataset for the Pie chart
     */
    private PieDataset createDataset() {
     DefaultPieDataset dataset = new DefaultPieDataset();
     dataset.setValue("One", new Double(43.2));
     dataset.setValue("Two", new Double(10.0));
     dataset.setValue("Three", new Double(27.5));
     dataset.setValue("Four", new Double(17.5));
     dataset.setValue("Five", new Double(11.0));
     dataset.setValue("Six", new Double(19.4));
     return dataset;
    }

    /**
     * Creates the Chart based on a dataset
     */
    private JFreeChart createChart(PieDataset dataset) {

     JFreeChart chart = ChartFactory.createPieChart("Pie Chart Demo 1", // chart
       // title
       dataset, // data
       true, // include legend
       true, false);

     PiePlot plot = (PiePlot) chart.getPlot();
     plot.setSectionOutlinesVisible(false);
     plot.setLabelFont(new Font("SansSerif", Font.PLAIN, 12));
     plot.setNoDataMessage("No data available");
     plot.setCircular(false);
     plot.setLabelGap(0.02);
     return chart;

    }
}

Thank you. It works after adding the JFreeChart libraries to the Manifest's classpath..

penguru 2009-10-02 08:55:02

You're welcome, for more information see this 3-part tutorial on RCP apps: http://www.eclipse.org/articles/Article-RCP-1/tutorial1.html

Rich Seller 2009-10-02 09:22:17

Nicely put and illustrated, as usual. +1

VonC 2009-10-02 10:47:56

@Rich Seller"Assuming the jar is in a sub-directory of your plugin project".. if I want add the jar files to run time tab of more than one plugin, where should I store them instead of the sub-directory of plugin ?

penguru 2009-11-13 13:54:03

You can host the jar in one plugin and add that plugin as a dependency of others. You'd need to ensure that the JFreeChart jar's packages are exported in the plugin's manifest (under the Runtime tab)

Rich Seller 2009-11-13 21:35:08

ansaurus

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Eclipse RCP with JFreeChart

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