Kotlin 允许使用 LazyThreadSafetyMode.PUBLICATION 作为lazy() 函数的参数来防止同步。 例子: val lazyVal: String by lazy { println("This is an") "example of lazy initialization!" } fun main() { println(lazyVal) } 输出: 在Kotlin 中使用 lateinit 初始化属性 后期初始化允许在构造函数之外初始化...
1. by lazy 原理 想象成"点外卖"模式: 先下单(声明),但不立即配送(初始化) 第一次想吃的时候(首次访问)才开始配送(初始化) 之后再想吃就直接吃已送到的饭(缓存值) class Restaurant { // 相当于提前下单,但还没配送 private val dinner by lazy { println("外卖开始配送...") // 初始化过程 "美味...
* If the initialization of a value throws an exception, it will attempt to reinitialize the value at next access. * * Note that the returned instance uses itself to synchronize on. Do not synchronize from external code on * the returned instance as it may cause accidental deadlock. Also t...
Effective C++笔记 Make sure that objects are initialized they’re used使用初始化列表(memberinitializationlist) default构造 伪初始化不同编译单元内定义之non-local static对象的初始化次序 解决方式 总结 [译]带你揭开Kotlin中属性代理和懒加载语法糖衣 ...
kotlin Do you have properties in your Kotlin types that you want to create later after initialization? You may want to avoid making them nullable, avoid using lateinit or delay an expensive set up process to a later point. In Kotlin this is where delegated properties and lazy properties in ...
初识Kotlin (二) --- lateinit vs lazy Kotlin Property Initialization 在使用 kotlin开发中,因为各种原因,我们会经常需要使用到延迟加载的功能(不在构造函数中初始化属性),目前kotlin的延迟加载主要有两种:lateinit 和 lazy ...
Implement Lazy Initialization in Java A getter method checks whether a private member has some value already. If it has, the function returns it; else, it creates a new instance and returns it for the first time execution. There are two methods to do lazy initialization. ...
the Component Holder. This code must be in every particular module, but in a real project, you should not duplicate it. Make a delegate. Inthe sample, you can find the code of the delegate. For convenience, below is the full code of the particular Component Holder with lazy initializat...
The following code behaves in a way that seems pretty counter-intuitive: val myLazyVal by lazy { println("Running lazy initializer!") runBlocking { someSuspendFunctionForInitialization() } } fun main() = runBlocking { coroutineScope { (0 until 10).map { launch { myLazyVal.someOperation()...
and Kotlin Programming Language contributors. * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file. */package kotlin/** * Creates a new instance of the [Lazy] that uses the specified initialization function [initializer]....