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
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...
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 ...
我简单地将静态的final字段放在我的类上面，如下所示Static #Static 定义的变量 其调用： 类名.变量名...
synchronized synchronized 关键字放在方法声明上时,表示该方法为Synchronized Methods,即同步方法,在The Java™ Tutorials中对同步方法有以下描述: First, it is not possible for two invocations of synchronized methods on the same object to interleave. When one thread is executing a synchronized method for ...
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} ...
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 ...
When I was starting to write Kotlin code, and one problem I faced was how the heck do I do static methods like I can add in Java? The solution… The companion object in your Kotlin class. class MyClass() { companion object {
public class HelloJava { public static void main(String[] args) { Hello hello = new Hello(); System.out.println(hello.name); } } 1. 2. 3. 4. 5. 6. 在Java 类中会报错 : 'name' has private access in 'Hello' 1. 在Java 类中 , 只能通过 Getter 和 Setter 方法 , 调用 Kotlin 字...
This is an issue for discussion of Kotlin statics and static extensions proposal. This proposal is the culmination of our research and design on KT-11968 Research and prototype namespace-based solution for statics and static extensions. ...