设计得很好的企业网站,星宿网站建设,企业手机网站建设精英,网站聊天室怎样做炫彩马甲kotlin获取属性属性获取器和设置器方法 (Properties Getter and Setter Methods) Variable having a class-level scope, declared inside the class body but outside the functions called property. 具有类级别范围的变量#xff0c;在类主体内部但在称为属性的函数外部声明…kotlin获取属性 属性获取器和设置器方法 (Properties Getter and Setter Methods) Variable having a class-level scope, declared inside the class body but outside the functions called property. 具有类级别范围的变量在类主体内部但在称为属性的函数外部声明。 Property can be declared with var(mutable) and val (read-only). 可以使用var(mutable)和val(只读)声明属性。 var/val propertyName: PropertyType property_initializer
[getter]
[setter]
property_initializer, getter, and Setter are optional. property_initializergetter和Setter是可选的。 Getter and Setter Auto-Generated into the code. Getter和Setter自动生成到代码中。 Getter is used to get the value of properties and setter is used to set value of properties. Getter用于获取属性值而setter用于设置属性值。 val(read-only) type property does not allow setter. val(只读)类型属性不允许使用setter。 If we dont want public access of setter than declare it private. 如果我们不希望公开访问setter则将其声明为私有。 var name:String
private set
程序以演示Kotlin中的属性Getter和Setter方法的示例 (Program to demonstrate the example of Properties Getter and Setter Methods in Kotlin) package com.includehelp
// Declare class,
class America{
// Declare property with initial value
var city:String NewYork
// Auto Generated getter and setter
}
// Declare class,
class India{
// Declare property with initial value
var city:String Delhi
// define optional getter and setter
get() field // Getter
set(value) { // Setter
fieldvalue
}
}
// Declare class, define optional getter and setter
class China{
// Declare property with initial value
var city:String Wuhan
// private setter, cant set value from outside the class
private set
// member function to set property
fun setCity(city:String){
this.citycity
}
}
// declare class, with customized getter and setter
class Japan{
// Declare property with initial value
var city:String Tokyo
// Getter of property
get() field.toUpperCase()
//setter of Property
set(value) {
fieldModern City $value
}
}
// Main function, entry Point of Program
fun main(){
// create Instance
val americaAmerica()
america.cityAlsakaaa // access setter
println(America : ${america.city}) // access getter
// create Instance
val indiaIndia()
india.cityMumbai // access setter
println(India : ${india.city}) // access getter
// create Instance
val chinaChina()
// Try to access private setter, leads to compile time error
// china.cityBeijing
// Set City by calling member function
china.setCity(Beijing)
println(China : ${china.city}) // access getter
// create Instance
val japanJapan()
india.cityQuoto // access setter
println(Japan : ${india.city}) // access getter
}
Output: 输出 America : Alsakaaa
India : Mumbai
China : Beijing
Japan : Quoto
翻译自: https://www.includehelp.com/kotlin/example-of-properties-getter-and-setter-methods.aspxkotlin获取属性