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How Do We Declare A Private Primary Constructor In Scala? How Do We Make A Call To A Private Primary Constructor In Scala?

Answer»

In Scala, we can declare a private Primary Constructor very easily. Just define a Primary Constructor as it is and ADD ‘private’ just after class NAME and before parameter LIST as shown below:

class Person private (name: String)
object Person{
 def apply(name: String) = new Person(name)
}

As it’s a private constructor, we cannot call it from outside. We should PROVIDE a factory method (that is apply method) as shown above and use that constructor INDIRECTLY.

In Scala, we can declare a private Primary Constructor very easily. Just define a Primary Constructor as it is and add ‘private’ just after class name and before parameter list as shown below:

class Person private (name: String)
object Person{
 def apply(name: String) = new Person(name)
}

As it’s a private constructor, we cannot call it from outside. We should provide a factory method (that is apply method) as shown above and use that constructor indirectly.


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