Object is not a value error in scala

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.

Answer 2

Just found this so maybe it will be useful to share my solution. If you have imported java.util.Map and need to use scala.collection.immutable.Map then use it with the full name so instead of

 Map(1 -> "one")

do

scala.collection.immutable.Map(1 -> "one")

This way it will know what you mean