generics

[pliant palm]

<@&987246399047479336> please have a look, thanks.

[safe shale]

generics

[pliant palm]

Here is an AI assisted attempt to answer your question 🤖. Maybe it helps! In any case, a human is on the way 👍. To continue talking to the AI, you can use </chatgpt:1108714622413963314>.

Yes, if your code has raw types and unchecked casts, you are indeed losing compile-time checks and safety. Raw types are essentially generic types without type parameters, and they exist for backward compatibility with pre-generics code. By using raw types, you bypass the type checking mechanism provided by generics.

Unchecked casts occur when you cast a generic type to a non-generic type or vice versa without providing explicit type information. This can lead to runtime errors if the actual types of the objects being cast do not match the expected types.

In your specific case, using Map<String, List<?>> means that you have a map where the keys are strings and the values are lists of unknown parameterized types. This allows you to store lists of any type in the map. However, when retrieving elements from this map, you will lose compile-time type safety because the compiler cannot guarantee that the retrieved list will contain elements of a specific type.

To address this issue and regain compile-time safety, you can consider using bounded wildcards or introducing a generic parameter for your list. For example:

Map<String, List<? extends SomeType>> map = new HashMap<>();

Here SomeType represents the specific type that should be stored in the list. By using bounded wildcards (? extends SomeType), you allow lists of any subtype of SomeType to be stored in the map while still maintaining compile-time checks when retrieving elements from it.

Alternatively, if all lists in your map should have elements of the same type, you can introduce a generic parameter for your list:

Map<String, List<ElementType>> map = new HashMap<>();