How to return Observable of type object from a method in the interface

问题

I am learning kotlin. as shown in the code below, i created a object Model and an interface. the method in the interface should return

Model.Result

but when I wrap the aforementioned data type in Observable I receive the following error

No type argument expected for class observable

please let me know how fix this issue...as i tried to find some solution in google but it does not work

Object:

public object Model {
data class Result(val query: Query)
data class Query(val searchinfo: SearchInfo)
data class SearchInfo(val totalhits: Int)
}

interface:

interface WikiService {
fun method1(): Observable<Model.Result>//No type argument expected for class observable

回答1:

Can you show imports? You have probably imported wrong Observable class. I think you are using RxJava2 so the import should be import io.reactivex.Observable

回答2:

You are using java.util.Observable that doesn't accept any paramter.

You should import io.reactivex.Observable that is parametrized.

来源：https://stackoverflow.com/questions/56950569/how-to-return-observable-of-type-object-from-a-method-in-the-interface