[JAVA] Extreme points in contours

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Hi everyone!

I need to find the coordinate of the top point of the largest contour in the scene. I can find the largest contour but I can't find info about extreme points in java. This is what I found in Python:

extTop = tuple(c[c[:, :, 1].argmin()][0])
extBot = tuple(c[c[:, :, 1].argmax()][0])

Can someone help me to understand how to do that in Java?

Thank you!