Cannot convert from List to List

Question

A raw list converts to List just fine. Why can\'t a list of raw lists convert to a list of List?

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Answer 1

You cannot assign or cast it directly, because raw type List isn't the same as List.

When using List type checking is ignored and you may use any generic method with any type. When using List the compiler won't let you use methods with generic parameters.

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Therefore you could either ignore the warnings:

@SuppressWarnings("rawtypes")

And/Or cast it explicitly with a workaround:

List> raw = (List>) ((Object)api());