Explanation of singleton objects in Scala

Question

I get the coding in that you basically provide an \"object SomeClass\" and a \"class SomeClass\" and the companion class is the class declaration and the object is a singleton.

Answer 1

In many cases we need a singleton to stand for unique object in our software system. Think about the the solar system. We may have following classes

class Planet
object Earth extends Planet
object Sun extends Planet

object is a simple way to create singleton, of course it is usually used to create class level method, as static method in java