I have a Java library that I have to use / call and I'm doing that from Scala. The Java library has a signature like this:
JavaFunction( List<Object[]> data) {
this.data = data;
}
I was under the assumption that to be compatible with this from Scala, I need to have a AnyRef, so I had this defined:
val fromScala: List[Array[AnyRef]] = List(
Array[AnyRef](1, "Str1", 'a'),
Array[AnyRef](2, "Str2", 'b'),
Array[AnyRef](3, "Str3", 'c'),
Array[AnyRef](4, "Str4", 'd')
)
When I tried to pass this to the constructor, upon compilation, I hit the following error:
the result type of an implicit conversion must be more specific than AnyRef
Array[AnyRef](1, "Str1", 'a')
I understand that the compiler is expecting that I should be explicit on my types, but I do not see any other way to make this compatible. Any ideas?
The problem is the 1 those are AnyVal instead of AnyRef thus an implicit conversion happens under the hood.
You may use Int.box(1) to create a java.lang.Integer
However, that boxing will nevertheless happen at runtime so you are only adding boilerplate, you may try to see if List[Array[Any]] compiles and works as expected.