![]() This primary constructor has two properties: name and roll. Here, (val name: String, var roll: Int), is the primary Constructor. We will discuss companion objects in next tutorial. In Kotlin language, the Constructor is declared with the class header, unlike Java, where you have to declare the Constructor in the class body. We saw primary constructors, primary constructors with init block, and secondary constructor. In this tutorial, we discussed constructors in Kotlin. We will discuss it in the Kotlin Inheritance tutorial. We can also call the constructor of the parent class (in case of inheritance) using super(). This constructor is calling other constructors with values 10.0 and 1.0 for mrp and discount. We can also call one secondary constructor from another secondary constructor using this(): constructor(_brand: String, _model: String): this(10f,1f) It is called using this():Ĭonstructor(_brand: String, _model: String): this() If the Primary constructor is already present then each secondary constructor should call the primary constructor.They are generally avoided, the init blocks can be used instead to perform any specific task before object creation. Secondary constructors are not that common. The primary constructor is created by adding constructor() at the end of the class name: class ClassName constructor()")įew points regarding secondary constructor: All the properties of class also became part of the primary constructor. The primary constructor is a part of the class header. It can be seen from the declaration of the primary constructor. One of the most important features of Kotlin is its conciseness. There can be only one primary constructor and many secondary constructors. There are two types of constructors in Kotlin: Whenever we create an object of a class, the constructor is automatically called. The constructor is called itself at the time of object creation. It can be considered as a special function. A constructor is used to initialize the class properties when a class object is created. The constructor will initialize the properties when you. You can specify the properties inside of the parantheses (like passing parameters into a regular function). A constructor is like a special function, and it is defined by using two parantheses () after the class name. In this tutorial, we will discuss the Kotlin class constructors. In Kotlin, theres a faster way of doing this, by using a constructor.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |