componentProvider = { x }, ... ) x = injector.createComponent() } 检查一个延迟初始化属性是否初始化 通过访问属性的isInitialized...var lateinitVar: String fun initializationLogic() { //sampleStart println("isInitialized...before assignment: " + this::lateinitVar.isInitialized) lateinitVar = "value" println...("isInitialized after assignment: " + this::lateinitVar.isInitialized) //sampleEnd }
文章目录 一、lateinit 延迟初始化 ( ::属性名称.isInitialized 检查属性是否初始化 ) 二、lazy 惰性初始化 一、lateinit 延迟初始化 ( ::属性名称.isInitialized...lateinit 关键字 设置该属性的 延迟初始化 , 在 实例对象 创建时不进行初始化 , 在使用该属性之前对其进行初始化即可 ; 对于 lateinit 延迟初始化 的属性 , 在使用前可以执行 ::属性名称.isInitialized...查看该属性是否进行了初始化操作 ; 代码示例 : class Hello{ lateinit var name: String fun logName() { if(::name.isInitialized
private lateinit var mList: MutableList<String fun main(args: Array<String ) { if (::mList.isInitialized...mList: MutableList<String } class PreB{ val mPreA = PreA() fun print(){ if (mPreA::mList.isInitialized...lateinit属性: class PreA{ lateinit var mList: MutableList<String fun isListInitialised() = ::mList.isInitialized
ClassLoader getClassLoader(){ return Thread.currentThread().getContextClassLoader(); } // 为提升性能,isInitialized...> loadClass(String className, boolean isInitialized){ Class cls; try{ cls = Class.forName(className,isInitialized,getClassLoader()); }catch(ClassNotFoundException
= null private var isInitialized: Boolean = false operator fun getValue(thisRef: Any?...isInitialized) { value = initializer() isInitialized = true }...isInitialized 用于追踪属性是否已经被初始化。 Lazy 类还实现了 getValue 操作符函数,这是属性委托的关键。...当被委托的属性首次被访问时,getValue 函数会执行 initializer lambda 表达式,初始化属性的值,并将 isInitialized 设置为 true。
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) 二、解决方案 ---- 使用 ::延迟初始化变量.isInitialized...::string.isInitialized) { return } 如果没有初始化则返回 ;
initializer = null typedValue } } } override fun isInitialized...== UNINITIALIZED_VALUE override fun toString(): String = if (isInitialized()) value.toString() else...returned `true` it stays `true` for the rest of lifetime of this Lazy instance. */ public fun isInitialized...@Suppress("UNCHECKED_CAST") return _value as T } override fun isInitialized...== UNINITIALIZED_VALUE override fun toString(): String = if (isInitialized()) value.toString() else
this.baseSiteService.isInitialized()) { this.baseSiteService.setActive( getContextParameterDefault...关于 CurrencyService 的 isInitialized 方法,我加了 config.log, 两次打印都是 true: onRead 成功从 localstorage 里读取到了 USD...,但是没有进入代码 29 行的 IF 分支,∵ currencyService.isInitialized 返回了 true: 所以这里没有执行 setActive 方法。
public abstract class UnityGuiView:MonoBehaviour,IView where T:ViewModelBase { private bool _isInitialized..._isInitialized) { OnInitialize(); _isInitialized = true;..._isInitialized) { OnInitialize(); _isInitialized = true; } } public virtual
ohhzxing As OhhZXing Dim barimg As Bitmap=ohhzxing.CreateQRcode(EditText1.Text,300,300) If barimg.IsInitialized...ohhzxing As OhhZXing Dim barimg As Bitmap=ohhzxing.CreatePDF417code(EditText1.Text,300,300) If barimg.IsInitialized...OhhZXing Dim barimg As Bitmap=ohhzxing.CreateBarcode(EditText1.Text,300,150,"CODE_128") If barimg.IsInitialized
/www.toly1994.com:8089/file/洛天依.mp3"); mPlayer = MediaPlayer.create(mContext, uri); isInitialized...isInitialized) { return; } mPlayer.start(); } /** * 销毁...= null) { mPlayer.release();//释放资源 mPlayer = null; } isInitialized...isInitialized && mPlayer.isPlaying()) { return; } mPlayer.start(); }...isInitialized) { return false; } return mPlayer.isPlaying(); } /
typedValue } } } // 判断是否初始化过 override fun isInitialized...== UNINITIALIZED_VALUE override fun toString(): String = if (isInitialized()) value.toString() else
延迟初始化属性检测 通过访问属性的isInitialized字段,现在开发者可以检查一个延迟初始化属性是否已经初始化。...class Foo { lateinit var lateinitVar: String fun initializationLogic() { println("isInitialized...before assignment: " + this::lateinitVar.isInitialized) lateinitVar = "value" println...("isInitialized after assignment: " + this::lateinitVar.isInitialized) } } fun main(args: Array...) { Foo().initializationLogic() } 运行结果为: isInitialized before assignment: false isInitialized
延迟初始化属性初始化判定 : this::name.isInitialized 2 ....本类中判定 : 延迟初始化 属性 只能在本类中使用 this::属性名称.isInitialized 进行判定 , 如果返回 true , 说明已经初始化 , 如果返回 false , 说明该属性还没有进行初始化...: String var age : Int = 0 fun isNameInitialized() : Boolean{ println("this::name.isInitialized...= ${this::name.isInitialized}") return this::name.isInitialized } } fun main() { var...println("name 属性已经初始化完毕") }else{ println("name 属性没有进行初始化") } } 执行结果 : this::name.isInitialized
() { 134 byte isInitialized = memoizedIsInitialized; 135 if (isInitialized !...= -1) return isInitialized == 1; 136 137 if (!...result.isInitialized()) { 349 throw newUninitializedMessageException(result); 350...() { 698 byte isInitialized = memoizedIsInitialized; 699 if (isInitialized !...= -1) return isInitialized == 1; 700 701 if (!
private ObjectProvider meterRegistry; //只初始化一次 private volatile boolean isInitialized...ApplicationContext 可能 refresh 多次,例如调用 /actuator/refresh,还有就是多 ApplicationContext 的场景 // 这里为了简单,通过一个简单的 isInitialized...isInitialized) { Gauge.builder("http_servlet_queue_size", () -> {...} return -1; }).register(meterRegistry.getIfAvailable()); isInitialized
private ObjectProvider meterRegistry; //只初始化一次 private volatile boolean isInitialized...ApplicationContext 可能 refresh 多次,例如调用 /actuator/refresh,还有就是多 ApplicationContext 的场景 // 这里为了简单,通过一个简单的 isInitialized...isInitialized) { //通过 LogManager 获取 LoggerContext,从而获取配置 LoggerContext loggerContext...Log4j2Configuration-init error: {}", e.getMessage(), e); } }); isInitialized
. /// public static bool IsInitialized { get
RuntimeException(); } instance = new AppContext(context); } public static boolean isInitialized...AppContext.isInitialized()){ AppContext.init(getApplicationContext()); } } }
isInitialized()) { init(); } return processEngines.get(processEngineName); } 第三步:...4.遍历所有的资源文件,通过initProcessEngineFromSpringResource这个方法构建其processEngine实例并添加其对应的属性 * * 5.将初始化属性isInitialized...isInitialized()) { if (processEngines == null) { processEngines = new HashMap<String, ProcessEngine
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