Classes can be declared in Kotlin using the word class followed by its name and body inside curly braces.
class Moominvalley{
//class body
}A class can have one or more Constructors, it can be declared as a Primary or a Secondary Constructor.
Primary Constructor Declaration
The primary constructor is part of the class header.
class Moominvalley(resident: String){//class body}
Secondary Constructor Declaration
class Moominvalley{
constructor(resident: String, kind: String){
print("Resident Name: $resident Kind: $kind")
}}
Initializer Block
init{} will be always initialized
fun main() {
Moominvalley("Moominmama","Moomin")
}class Moominvalley(resident: String){
constructor(resident: String, kind: String ): this(resident){
println("Resident Name: $resident Kind: $kind")
}//initializer Block
init {
println("Welcome to Moominvalley, $resident!")
}
}--------------
Output: Welcome to Moominvalley, Moominmama!
Resident Name: Moominmama Kind: Moomin
Note: You can’t use the kind variable inside the initializer block because it is not accessible.
I’m still learning, please leave a comment if there’s something I need to improve/learn/ elaborate on. Arigato!
