Field xxx is never assigned to, and will always have its default value null

Question

Anyone know whats this problem?

I got this warning Field xxx is never assigned to, and will always have its default value null on private sta

Answer 1

The compiler is warning you that quantit is never initialized and will always be null.

You probably should initialize it with an instance of a class that derives from ImageManipulation.Quantizer (you cannot instantiate Quantizer itself because it's an abstract class):

private static Quantizer quantit = new QuantizerImplementation();