Multi tool use

How to convert BehaviorSubject<Optional<List<File>>> to Kotlin?

I have BehaviorSubject in RxJava, but I am not able convert it to Kotlin.

public class Test {

private final BehaviorSubject<Optional<List<File>>> fileList = BehaviorSubject.createDefault(Optional.absent());

void test() {
File file = new File("");
fileList.getValue().get().add(file);
}

}


This is converted BehaviorSubject to Kotlin, but I am not able to ADD object (file) to list.

class Test {

private val fileList = BehaviorSubject.createDefault(Optional.absent<List<File>>())

internal fun test() {
val file = File("")
fileList.value.get().add(file)
}

}


I have following imports:

implementation 'io.reactivex.rxjava2:rxandroid:2.0.2'
implementation 'io.reactivex.rxjava2:rxjava:2.1.13'
implementation 'io.reactivex.rxjava2:rxkotlin:2.2.0'


1 Answer
1

Kotlin distinguishes between immutable Lists (the default), and MutableLists. Declare a MutableList instead.

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