[Geotools-gt2-users] Image tutorial not working

[maca delic]

Hi, i was going through the image tutroial (https://docs.geotools.org/latest/userguide/tutorial/raster/image.html). And just copy & pasted the wmslab class from the tutorial (from the extra things to try) and executed it. A swing window opens, which displays the wms, but as soon as i click the button to display the full extent of all layers without doing anything else i get a nullpointer:

 

java.lang.NullPointerException
    at javax.media.jai.RenderedImageAdapter.getProperty(RenderedImageAdapter.java:189)
    at org.geotools.image.ImageWorker.extractNoDataProperty(ImageWorker.java:548)
    at org.geotools.image.ImageWorker.setImage(ImageWorker.java:567)
    at org.geotools.image.ImageWorker.<init>(ImageWorker.java:510)
    at org.geotools.renderer.lite.gridcoverage2d.GridCoverageRendererUtilities.affine(GridCoverageRendererUtilities.java:684)
    at org.geotools.renderer.lite.gridcoverage2d.GridCoverageRenderer.affine(GridCoverageRenderer.java:515)
    at org.geotools.renderer.lite.gridcoverage2d.GridCoverageRenderer.symbolize(GridCoverageRenderer.java:442)
    at org.geotools.renderer.lite.gridcoverage2d.GridCoverageRenderer.renderImage(GridCoverageRenderer.java:761)
    at org.geotools.renderer.lite.gridcoverage2d.GridCoverageRenderer.paint(GridCoverageRenderer.java:910)
    at org.geotools.renderer.lite.StreamingRenderer$RenderCoverageReaderRequest.execute(StreamingRenderer.java:3900)
    at org.geotools.renderer.lite.StreamingRenderer$PainterThread.run(StreamingRenderer.java:4011)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
 

Why does that happen? I tried multiple wms and it's the same for all. I didn't change the code, just copied from the tutorial.

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