public enum Command implements OrdinalEnum{ PRINT_FOO(-7), PRINT_BAR(6), PRINT_BAZ(4); private int val; private Command(int val){ this.val = val; } public int getVal(){ return val; } private static Map map = OrdinalEnum.getValues(Command.class); public static Command from(int i)...
[转]C++11的enum class & enum struct和enum 1. 旧版enum存在的问题 问题描述 1 向整形的隐式转换(Implicit conversion to an integer) 2 无法指定底层所使用的数据类型(Inability to specify underlying type) 3 enum的作用域(Scope) 4 不同编译器解决该问题的方法不统一 1.1 问题1:向整形的隐式转换 在...
1、常规代码 publicStringgetSeasonString(Integer key){switch(key) {case1:return"SPRING";case2:return"SUMMER";case3:return"AUTUMN";case4:return"WINTER";default:returnnull;}} 2、使用枚举 // 定义枚举类@JsonFormat(shape = JsonFormat.Shape.OBJE...
ToObject(Type, Int16) Converts the specified 16-bit signed integer to an enumeration member. ToObject(Type, Int32) Converts the specified 32-bit signed integer to an enumeration member. ToObject(Type, Int64) Converts the specified 64-bit signed integer to an enumeration member. ...
Integer getId(); } public interface CodeBaseEnum { String getCode(); } public interface IdCodeBaseEnum extends IdBaseEnum, CodeBaseEnum { } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 接下来就该定义我们的主角了。 定义枚举 前面定义了三个接口,分别是单独 id、单独 code,和有 id 和 code 的...
class Teachers(db.Model): __tablename__ = 'teacher' # 数据库表名 id = db.Column(db.Integer, primary_key=True, autoincrement=True) name = db.Column(db.String(50), unique=True, nullable=False) size = db.Column(db.Enum("SMALL", "MEDIUM", "LARGE"), default="MEDIUM") address = ...
To create anenum, use theenumkeyword (instead of class or interface), and separate the enum items with a comma: ExampleGet your own C# Server enumLevel{Low,Medium,High} You can accessenumitems with thedotsyntax: LevelmyVar=Level.Medium;Console.WriteLine(myVar); ...
PRIMITIVE_WRAPPER_TYPE_MAP.put(Integer.class,int.class); PRIMITIVE_WRAPPER_TYPE_MAP.put(Long.class,long.class); PRIMITIVE_WRAPPER_TYPE_MAP.put(Short.class,short.class);for(Map.Entry<Class<?>, Class<?>>entry : PRIMITIVE_WRAPPER_TYPE_MAP.entrySet()) { ...
Class 语句 Const 语句 Continue 语句 Declare Statement Delegate 语句 Dim 语句 Do...Loop 语句 Else 语句 End 语句 End <keyword> 语句 Enum 语句 Erase 语句 Error 语句 Event 语句 Exit 语句 F-P 语句 Q-Z 语句 子句 声明上下文和默认访问级别 ...
$ExportableTypes =@( [DefinedTypeName] ) # Get the internal TypeAccelerators class to use its static methods. $TypeAcceleratorsClass = [psobject].Assembly.GetType( 'System.Management.Automation.TypeAccelerators' ) # Ensure none of the types would clobber an existing type accelerator. # If a type...