Question

While trying to make a map in Scala, I receive the following error message: object Map is not a value

The code I’m using is the following:

val myStringMap =  Map[String, String]("first" -> "A", "second" -> "B", "third" -> "C")

I am quite puzzled as to why I cannot create this map because after looking at Scala documentation, it seems to me that the syntax of my code is proper.

Answer 1

When you see the error “object is not a value” this typically means that the in-scope type is a Java type – you probably are importing java.util.Map in scope

scala> Map(1 -> "one")
res0: scala.collection.immutable.Map[Int,java.lang.String] = Map(1 -> one)

But

scala> import java.util.Map
import java.util.Map

scala> Map(1 -> "one")
<console>:9: error: object Map is not a value
              Map(1 -> "one")
              ^

Remember, in scala each class comes with a (optional) companion object which is a value. This is not true of Java classes.