i'm trying to put a `java.lang.Object` in a map with type `Map<Class<*>, Any>`, i'm gett...

# getting-started

[tipsy]

i'm trying to put a java.lang.Object in a map with type Map<Class<*>, Any>, i'm getting the following error message that i'm not able to figure out:

Required type: capture of ? extends Object
Provided: Object

[diesieben07]

Map in Kotlin is Map<K, out V> because Map is read only. If you intend to mutate it you should declare it as MutableMap

[tipsy]

of course

[tipsy]

haha

[tipsy]

ctrl+alt+shift+k is dangerous

[tipsy]

thank you 😄

[tipsy]

i still don't understand the error message though

[diesieben07]

Map<Class<*>, Any> = Map<Class<*>, out Any> = Map<Class<?>, ? extends Object>

[diesieben07]

And that means "I don't know what the values are, but they extend Object. That effectively means "I can't put anything in here, because I don't know what goes there"

[diesieben07]

"capture of ? extends Object" means "whatever type would go there" basically. And "Object" is not it