publicclassPerson{privateStringname;privateintage;publicPerson(Stringname,intage){this.name=name;this.age=age;}// 属性 name 没有 setterpublicStringgetName(){returnname;}publicintgetAge(){returnage;}publicvoidsetAge(intage){this.age=age;}} Class Kotlin 代码语言:text AI代码解释 class Person(val ...
private Companion() { } public static final Companion Companion = new Companion((DefaultConstructorMarker)null); public static final int LEARNING_FRAGMENT_INDEX = 0; public static final class Companion { public final void jumpToMe(@NotNull Context context, int index) { } } 可以看到jumpToMe()并...
高阶函数(Primary constructors) 函数字面量和内联函数(Function literals & inline functions) 类委托(Class delegation) 等等... 基本语法 (Basic Syntax ) 变量(Variables) 基本数据类型( Basic Data Type ) 空安全(Null Safety ) 函数声明( Define Function ) 让函数更好的调用( Making functions easier to ...
用 Kotlin的专业术语来说,叫作:所有的次构造器都要委托调用初始化块。 class Apple(name: String) { operator fun component1(): String { return } operator fun component2(): String { return this.color } var name: String var color: String //委托给主构造器 constructor(name: String, color: String...
Kotlin Data Class Features Following are some features that a Data Class provides. To create a parameterless constructor, specify default values to each of the parameters present in the primary constructor. A Data Class allows subclassing(No need to mention the keywordopen). ...
this.mData.get(position); } public int getCount() { return PageTestKt.this.mData.size(); } } } 总结一下:声明嵌套类时,在 Java 中是在外部类内部使用 static class A , 而在 Kotlin 中只需要在外部类内部使用 class A 即可;声明内部时,在 Java 中只需要在外部类内部使用 class A , 而在 ...
今天来学习一下全新关于Kotlin的概念---数据类【data class】,也是非常有用的东东,下面先来对其进行理论化的了解: 数据类其实跟java的实体类(model)很类似,像Java定义一个Person类,里面有各种属性然后再生成它的get和set方法,当然可以借助于IDE来生成,但是其实java的这种做法是挺冗长啰嗦的,当然其实有现成的解决方案...
Data Class 1. Overview As data containers, Kotlin’sdata classes, have implemented a few valuable methods by default, such asequals(),toString(),copy(), and so on. In this tutorial, let’s explore how to instantiate a Kotlindata classusing an empty constructor. ...
The primary constructors definition goes inside the class header. We’ve defined the property types(val/var) in the constructor itself. Note: Unless stated as avar, by default, constructor arguments areval. class User(name: String, isAdmin: Boolean) ...
Fastjson反序列化kotlin data class对象,参考Use Fastjson in Kotlin 运行demo: data class DataClassSimple(val a : Int, val b : Int) fun main(args: Array<String>) { val dts = DataClassSimple(1,2) val jsons = JSON.toJSONString(dts) println(jsons) val cl...