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This article mainly introduces the "kotlin in the setter and getter attributes how to use" related knowledge, editor through the actual case to show you the process of operation, the method of operation is simple and fast, practical, I hope that this "how to use the setter and getter attributes in kotlin" article can help you solve the problem.

1. In Kotlin, getter and setter are optional, and if you don't create them in your code, it will be generated automatically by default.

Class Account {

Var name: String = ""

Var age: Int = 0

Var balance: Double = 0.0

}

Equivalent to

Class Account {

Var name: String = ""

Var age: Int = 0

Var balance: Double = 0.0

/ / this set and get method is not recommended to write it manually in the code.

Set (vaule) {

Field = value

}

Get () = field

}

Note:

The 1.field keyword represents the current domain.

The 2.var keyword is declared as a mutable attribute.

The 3.val keyword is declared as a read-only property.

Use:

Val mAccount = Account ()

/ / assignment

MAccount.name = "Qinchuan Young General"

MAccount.age = 18

MAccount.balance = 100.0

/ / printout

Println ("${mAccount.name}")

Println ("${mAccount.age}")

Println ("${mAccount.balance}")

Output:

... / com.sample.app I/System.out: Qin Chuan young general

... / com.sample.app I/System.out: 18

... / com.sample.app I/System.out: 100.0

two。 If you add modifiers to the properties of an object, you can write the setter and getter methods manually

Class Account {

Private var name: String = ""

Private var age: Int = 0

Private var balance: Double = 0.0

Fun setName (name: String) {

This.name = name

}

Fun getName (): String {

Return this.name

}

Fun setAge (age: Int) {

This.age = age

}

Fun getAge (): Int {

Return this.age

}

Fun setBalance (balance: Double) {

This.balance = balance

}

Fun getBalance (): Double {

Return this.balance

}

}

Use:

Val mAccount = Account ()

/ / assignment

MAccount.setName ("Qinchuan Young General")

MAccount.setAge (18)

MAccount.setBalance (100.0)

/ / printout

Println ("${mAccount.getName ()}")

Println ("${mAccount.getAge ()}")

Println ("${mAccount.getBalance ()}")

Output:

... / com.sample.app I/System.out: Qin Chuan young general

... / com.sample.app I/System.out: 18

... / com.sample.app I/System.out: 100.0

If there is no modifier, the first scheme is recommended, and the properties in the kotlin object are decorated by public by default.

This is the end of the introduction to "how to use the setter and getter properties in kotlin". Thank you for reading. If you want to know more about the industry, you can follow the industry information channel. The editor will update different knowledge points for you every day.

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