Cascade clasificator JAVA does not load XML

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Hi, I have tried first steps with OpenCV and have a problem I need help with.

Based on examples I wanted to test face detection. I prepared a simple code that loads a image and should run the detection with the source-code follows:

Source code test2.java

public void run(){


    System.out.println("Start");
    System.out.println(Core.VERSION);


    System.out.println(getClass().getResource("CV_test.jpg").getPath());
    Mat image = Imgcodecs.imread(getClass().getResource("CV_test.jpg").getPath());
    System.out.println(image.height()+"x"+image.width());


    System.out.println(getClass().getResource("haarcascade_frontalface_default.xml").getPath());
    CascadeClassifier faceDetector = new CascadeClassifier(getClass().getResource("haarcascade_frontalface_default.xml").getPath());
    System.out.println(faceDetector.empty());


}

and console output:

Console output

Start
3.1.0-dev
/home/ocena/workspace/test2/bin/test2/CV_test.jpg
520x782
/home/ocena/workspace/test2/bin/test2/haarcascade_frontalface_default.xml
true

CV_test.jpg & haarcascade_frontalface_default.xml are in the same directory and the image is loaded OK where the XML not.

Any idea what is wrong?

Thanks for hint, J.Ocenasek