Wrapping null-returning method in Java with Option in Scala?

The Option companion object's apply method serves as a conversion function from nullable references:

scala> Option(null)
res4: Option[Null] = None

scala> Option(3)   
res5: Option[Int] = Some(3)

The Option object has an applymethod that does exactly that:

var myOptionalString = Option(session.get("foo"));

Notice that when working with Java objects it won't work as expected:

val nullValueInteger : java.lang.Integer = null
val option: Option[Int] = Option(nullValueInteger)
println(option)  // Doesn't work - zero value on conversion

val nullStringValue : String = null
val optionString: Option[String] = Option(nullStringValue)
println(optionString) // Works - None value