In Scala, we USE ‘object’ keyword to define Factory methods. The main purpose of these Factory methods in Scala is to avoid using ‘new’ keyword. Without using ‘new’ keyword we can create OBJECTS.

To define Factory methods:

We can use apply method to define Factory methods in Scala. If we have Primary Constructor and Multiple Auxiliary CONSTRUCTORS, then we NEED to define multiple apply methods as shown below.

class Person(val FIRSTNAME: String, val middleName: String, val lastName: String){
def this(firstName: String, lastName: String){
this(firstName,"",lastName)
}
}
object Person{
def apply(val firstName: String, val middleName: String, val lastName: String) 
= new Person(firstName,middleName,lastName)
 
def apply(val firstName: String, val lastName: String) 
= new Person(firstName, lastName)
}
Now we can create Person objects without using new keyword or with new keyword upto your wish.
val p1 = new Person("Scala","Java")
or 
val p1 = Person("Scala","Java")

In Scala, we use ‘object’ keyword to define Factory methods. The main purpose of these Factory methods in Scala is to avoid using ‘new’ keyword. Without using ‘new’ keyword we can create objects.

To define Factory methods:

We can use apply method to define Factory methods in Scala. If we have Primary Constructor and Multiple Auxiliary constructors, then we need to define multiple apply methods as shown below.

class Person(val firstName: String, val middleName: String, val lastName: String){
def this(firstName: String, lastName: String){
this(firstName,"",lastName)
}
}
object Person{
def apply(val firstName: String, val middleName: String, val lastName: String) 
= new Person(firstName,middleName,lastName)
 
def apply(val firstName: String, val lastName: String) 
= new Person(firstName, lastName)
}
Now we can create Person objects without using new keyword or with new keyword upto your wish.
val p1 = new Person("Scala","Java")
or 
val p1 = Person("Scala","Java")