Question

What are different packages in Scala?

Answer 1

The default Scala packages are Java.lang, Java.io, and PreDef, each of which has varying functionalities.  

1. Java.lang: Fundamentally, Java.lang is a package containing classes compatible with the Java programming language.
2. Java.io: You can import Scala classes for input-output resources with Java.io.
3. PreDef: The PreDef package implements type aliases for collections such as Map, Set, and List that are specifically immutable.