可以看出Swift中枚举变得更加灵活和复杂,有递归枚举的概念,还有很多和Class类似的特性,比如:计算属性用来提供关于枚举当前值的额外信息;实例方法提供与枚举表示值相关的功能;定义初始化器来初始化成员值;而且能够遵循协议来提供标准功能等等,由于笔者目前还没有更加深入的学习这些东西,所以这些内容有机会将在后面的章节讲到。
publicclassEnumSingletonTest{publicstatic voidmain(String[]args){EnumSingleton enumSingleton=EnumSingleton.getInstance();enumSingleton.setData(newObject());System.out.println("创建单例模式:"+enumSingleton);try{Class clazz=EnumSingleton.class;Constructor c=clazz.getDeclaredConstructor(String.class,int.class...
3.在没有指定成员的访问权限时,union中默认为public权限 4.union中的成员类型比class少,具体见2.2.1节 2.2.1C++中的 union 不能存放的成员类型 联合里面的东西共享内存,所以静态、引用都不能用,因为他们不可能共享内存。 不是所有类都能作为union的成员变量,如果一个类,包括其父类,含有自定义的constructor,copy...
publicclassMain{publicstaticvoidmain(String[]args)throws Exception{EnumSingleton s=EnumSingleton.INSTANCE;// 拿到所有的构造函数,包括非public的Constructor<EnumSingleton>constructor=EnumSingleton.class.getDeclaredConstructor();constructor.setAccessible(true);// 使用空构造函数new一个实例。即使它是private的~~~En...
Enum Constructor Reference Feedback Definition Namespace: System Assembly: System.Runtime.dll Source: Enum.CoreCLR.cs Initializes a new instance of the Enum class. C# コピー protected Enum (); Applies to 製品バージョン .NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, ...
Constructors 展开表 Enum(IntPtr, JniHandleOwnership) A constructor used when creating managed representations of JNI objects; called by the runtime. Enum(String, Int32) Sole constructor. Properties 展开表 Class Returns the runtime class of this Object. (Inherited from Object) Declaring...
Constructor Details RunbookTypeEnum @Deprecatedpublic RunbookTypeEnum() Deprecated Use the fromString(String name) factory method. Creates a new instance of RunbookTypeEnum value. Method Details fromString public static RunbookTypeEnum fromString(String name) Creates or finds a RunbookTypeEnum from...
Constructor Summary 展開表格 ConstructorDescription ColumnTypeEnum() Deprecated Use the fromString(String name) factory method. Creates a new instance of ColumnTypeEnum value. Method Summary 展開表格 Modifier and TypeMethod and Description static ColumnTypeEnum fromString(String name) Creates...
Enum Constructor 發行項 2011/09/08 本文內容 Syntax Version Information See Also Initializes a new instance of the Enum class.Namespace: System Assembly: mscorlib (in mscorlib.dll)SyntaxC# 複製 protected Enum () Version InformationAvailable in the .NET Micro Framework versions 2.0, 2.5, 3.0...
classSizes{staticSmall=newSizes('small')staticMedium=newSizes('medium')staticLarge=newSizes('large')#valueconstructor(value){this.#value=value}toString(){returnthis.#value}}constmySize=Sizes.Smallconsole.log(mySize===newSizes('small'))// logs false ...