Any不是 java.lang.Object;事实上它除了 equals(),hashCode()以及toString()外没有任何成员了。 声明一个明确的父类,需要在类头后加冒号再加父类: open class Base(p: Int) class Derived(p: Int) : Base(p) 1. 2. 3. 如果类有主构造器,则基类可以而且是必须在主构造器中立即初始化。 如果类没有主...
最近开始使用kotlin写项目了,这几天一直对object,companion object,内部类和inner class搞得有点迷糊 现在抽空,理清一下他们之间区别 我定义了一个class A 然后再class A内部分别定义了class B,object C,companion object D,inner class E四中不同的类
classPerson{varlastName:String="zhang"get()=field.toUpperCase()// 将变量赋值后转换为大写setvarno:Int=100get()=field// 后端变量set(value){if(value<10){// 如果传入的值小于 10 返回该值field=value}else{field=-1// 如果传入的值大于等于 10 返回 -1}}varheiht:Float=145.4fprivateset}// 测试...
class MyClass { companion object Factory { fun create(): MyClass = MyClass() } } 使用时就是用类+方法:MyClass.create()。 扩展阅读Object expressions and declarations。 纯数据类型 对于函数式编程,通常要写大量的PoJo用以在函数之间传递数据,这些对象最大的特点就是仅是数据,且不可变(Immutable),通常...
Caused by: java.lang.ClassNotFoundException: org.jetbrains.kotlin.psi.KtClassOrObject PluginClassLoader(plugin=PluginDescriptor(name=MyBatisX, id=com.baomidou.plugin.idea.mybatisx, descriptorPath=plugin.xml, path=~\AppData\Roaming\JetBrains\IntelliJIdea2021.1\plugins\MybatisX, version=1.4.12, packa...
class BubblePickerListener : Java.Lang.Object, IBubblePickerListener { public View Picker { get; } public BubblePickerListener(View picker) { Picker = picker; } public void OnBubbleDeselected(PickerItem item) { Snackbar.Make(Picker, $"Deselected: {item.Title}"...
privatefunsignOutCallback(): ISingleAccountPublicClientApplication.SignOutCallback {returnobject: ISingleAccountPublicClientApplication.SignOutCallback {overridefunonSignOut(){ account =nullupdateUI(account) }overridefunonError(exception:MsalException){ binding.txtLog.text = getString(R.string.exception_...
val method = classOf[ProvisioningApp].getDeclaredMethod("sayGoodbye") method.setAccessible(true) method.invoke(app) } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 2.2 使用 Java 的方式反射 Scala object Scala 中的 object,称之为 “伴生类”,想要反射获取它的类或者方法,首先要知道它编译之后是个...
sealedinterfaceIMsg{sealedinterfacePage:IMsg{objectInit:PagedataclassStateChange(valstate:Int):Page}sealedinterfaceUser:IMsg{objectLogin:UserobjectLogout:User}} 多层级数据kotlin的解析处理 privatefuntest(msg:IMsg){when(msg){isIMsg.Page->{dispatchPageMsg(it)}isIMsg.User->{dispatchUserMsg(it)}}}/*...
Kotlin is the statistically typed language; kotlin was built into Java to inherit all the object-related Java concepts from Java. In kotlin, class is nothing but the blueprint of the entity that was showing in runtime. The kotlin object is nothing but a state, including state behavior. We...