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Editorial Team
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Asked: 2026-05-23T01:31:52+00:00

When implementing a Scala trait, one has to implement the trait’s methods and the

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When implementing a Scala trait, one has to implement the trait’s methods and the simply call the respective static method on Foo$class.class. I’m not sure however how to deal with private fields which are defined in the trait.

That is, if there is a field _something in the trait, if I don’t implement _something_$eq() and _something(), the compiler yells at me. My assumption is that I have to create a _something field in my implementing class.

I just want to confirm that this is the correct way of handling this issue.

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  1. Editorial Team

    Yes, create the private field in the class

    Note you also need to call the init method of the Foo$class module

    If you want to see exactly what you need to do, just create a Scala class that extends Foo, compile it, and then use a decompiler (jd-gui) to see how it was generated.

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