在Kotlin中,虽然没有直接等同于Java中static关键字的概念,但Kotlin通过对象声明(object declarations)和伴生对象(companion objects)来实现类似静态变量和静态方法的功能。下面我将根据要求逐一解答你的问题。 1. 解释什么是Kotlin中的静态变量 在Kotlin中,所谓的“静态变量”通常指的是那些可以在没有创建类实例的情况下...
在kotlin里,因为java的静态变量及方法都是放在伴生对象里实现的,而伴生对象也是一个普通对象,所以可以通过伴生对象的init方法来实现变量的初始化,代码如下: class StaticTest companion object//伴生对象是可以指定名字的,不过一般都省略掉。 var STATIC_VAR = 0 init STATIC_VAR = 100 println("in companion object...
classFoo{companionobjectBlah {funa():Int=1; } } 它可以让您以相同的方式从Kotlin调用它。在JAVA中可以用Foo.Blah.a()在Java中调用它(这个调用方法在Kotlin中也可以使用)。 第二种回答 A.旧的Java方式: 声明companion object以包含静态方法/变量 classFoo{companionobject{funfoo()= println("Foo")valbar ...
Kotlin is designed so that there’s no such thing as a “static member” in a class. If you have a function in a class, it can only be called on instances of this class. If you need something that is not attached to an instance of any class, you define it in a package, outside...
First, we’ll take a quick look atstaticinitialization in Java. Then we’re going to achieve the same in Kotlin. Along the way, we’ll take a peek at the bytecode representation of the Kotlin solution. 2. Static Initialization In Java, to initializestaticcomponents of a class, we can ...
问在Kotlin中，Java static final字段的等价物是什么？EN根据Kotlindocumentation的说法，这是等价的：...
Note:In Java, only nested classes are allowed to be static. Like regular classes, static nested classes can include both static and non-static fields and methods. For example, Class Animal {staticclassMammal{// static and non-static members of Mammal}// members of Animal} ...
希望大家通过这code出完美兼容java的kotlin代码,让java和kotlin想看两不厌。 先来个方法总览: @JvmStatic 告诉jvm生成静态方法和成员 @JvmOverloads 生成Java重载方法,应用于kotlin方法有默认值生成对于的java方法 @JvmName 改变getter和setter中的方法名 @JvmField 直接暴露类中的属性和 @Throws 声明这个方法要检查...
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:665) 定位下去,原来是阿里云java sdk在向服务器穿参数的时候用到了Base64加密,具体使用org.apache.commons.codec.binary.Base64.encodeBase64String()这个方法。然而Android系统也有这个库,覆盖了sdk的引用,但是版本太老了,没有这个...
In Java, where everything is a class and must be dynamically instantialized, it makes sense. But in Kotlin we have top level functions, objects etc. The concept of static does not make a lot of sense. On the other hand namespace makes a lot of sense. It emphasizes the fact that we...