通过外部Eclipse项目在RCP应用程序中添加jar

Question

I am learning rcp development, and currently I try to import some SWT widgets into an e4 RCP app, but I have problems.

I found jars for the XYGraph component here , and from the tutorial of lars Vogel, I learned to import some jars in an RCP app: I created a "Project from jars" in eclipse, in which I put all the jars (not only those mentionned above, but also others from the nebula project, but it not linked to the problem I get). then, I added the plugin project with the jars in the manifest file of my RCP app(in the dependencies tab). After that, I added the right "import" statements in my part file, and all should be good... but I get this error when I launch the RCP app(from the product file): java.lang.NoClassDefFoundError: org/eclipse/draw2d/IFigure at the line 51

here is me RCP @postConstruct file: an arrow shows the line 51

@PostConstruct
public void postConstruct(Composite parent) {
    parent.setLayout(new FillLayout(SWT.HORIZONTAL));

    Canvas canvas = new Canvas(parent, SWT.NONE);

    LightweightSystem lws = new LightweightSystem(canvas);


    // create a new XY Graph.
    XYGraph xyGraph = new XYGraph();  <---- line 51
    xyGraph.setTitle("Simple Example");
    // set it as the content of LightwightSystem
    lws.setContents(xyGraph);

    // create a trace data provider, which will provide the data to the
    // trace.
    CircularBufferDataProvider traceDataProvider = new CircularBufferDataProvider(
            false);
    traceDataProvider.setBufferSize(100);
    traceDataProvider.setCurrentXDataArray(new double[] { 10, 23, 34, 45,
            56, 78, 88, 99 });
    traceDataProvider.setCurrentYDataArray(new double[] { 11, 44, 55, 45,
            88, 98, 52, 23 });

    // create the trace
    Trace trace = new Trace("Trace1-XY Plot", xyGraph.primaryXAxis,
            xyGraph.primaryYAxis, traceDataProvider);

    // set trace property
    trace.setPointStyle(PointStyle.XCROSS);

    // add the trace to xyGraph
    xyGraph.addTrace(trace);
}

do you have an idea about the origin of this error?

EDIT: here are all the 4 files:

NebulaJars (jars plugin): MANIFEST.MF
https://paste.ofcode.org/mchNUQdCpGde3Tf2yKp8Qr
NebulaJars (jars plugin): build.properties
https://paste.ofcode.org/J6UHffTrjvGfWvHSqunQks
RCP project:
MANIFEST.MF
https://paste.ofcode.org/hR7ZkU85qXAqBPjTam53nV
build.properties
https://paste.ofcode.org/DWEc8SV9U85rHMKk4Eb9X3

EDIT 2:

Answer 1

Did you add the corresponding exported packages in runtime tab of the manifest file created for XYGraph (and others...) plugin ?

EDIT 1 : Try to tune your plugins from your launch configuration. You can access launch configuration from Run->Run Configurations... menu. Check if your plugin configuration is valid.