hi everyone, what is difference between companion object and object keyword? tks so much

companion object

is just an

object

inside a

class

.

Altho there can be objects inside a class that are not companion

Companion object also can reference to any thing in that class including private variable, …

No they can't

Companion object and object keyword are also replace "static" keyword (java), but I have not just see what difference between it, Can one clarify for me to be clear?

Note that

object

keyword can be used in other contexts too

class AB { private val NAME = “name” companion object { fun print() { AB().NAME } } }

oh, nice, I did no know. The object does not have to be companion thou

about jvm-static, should u explain some about it? when do we use it?

@hqbao : object keyword will perform that feature class AB { private val NAME = “name” object { fun print() { AB().NAME } } }

i dont know too, 😞

@voddan : "`object` creates a singleton, that's it. It is not directly related to `static`" ==> I think 'object' keyword in Kotlin will be replaced "static" keyword in Java

Companion object is an object that shares namespace with its containing class. You can refer to the members of companion object using the scope of the containing class both outside and inside of the class. In particular, it means, that inside the class you can refer to the

member

of companion object directly, without writing

Companion.member

and outside of the class you can write

Class.member

instead of

Class.Companion.member

.

✅