Scala FAQ: How do I find API documentation (Scaladoc) for the Scala String class?
Scala doesn’t have its own String class, but you can use all of the methods of the Java String class, and additional implicit methods that are added through the Scala StringOps class. From the Scaladoc of the Scala Predef object: “The String type in Scala has methods that come either from the underlying Java String, or are added implicitly through scala.collection.immutable.StringOps.”
When I look at the documentation for the Scala Predef object — which is implicitly imported and available to all of your classes and objects — there are also conversion methods to go to and from a String and a Scala WrappedString, but I haven’t looked into what methods might come from StringOps and which ones might come from WrappedString. (I’ll leave that as an exercise for the reader for now.)