does anybody know why I cant override LinkedHashMa...

# announcements

[groostav]

does anybody know why I cant override LinkedHashMaps removeEldestEntry in java-covariant way with Any as the argument type?

eg:

val thingy : LinkedHashMap<AnnoyingKeyType, ValueType> = object: LinkedHashMap<AnnoyingKeyType, ValueType>{
  override fun removeEldestEntry(eldest: MutableMap.MutableEntry<AnnoyingKeyType, ValueType>?) = ...
}

is the default signature, and it is legal to override it with:

val thingy : LinkedHashMap<AnnoyingKeyType, ValueType> = object: LinkedHashMap<AnnoyingKeyType, ValueType>{
  override fun removeEldestEntry(eldest: Map.Entry<AnnoyingKeyType, ValueType>?) = ...
}

but it is not legal to override it with

val thingy : LinkedHashMap<AnnoyingKeyType, ValueType> = object: LinkedHashMap<AnnoyingKeyType, ValueType>{
  override fun removeEldestEntry(eldest: Any?) = ...
}

why?