In Java (from 1.5), enums are represented usingenumdata type. Java enums are more powerful thanC/C++ enums. In Java, we can also add variables, methods, and constructors to it. The main objective of enum is to define our own data types(Enumerated Data Types). Declaration of enum in...
2. Use Enum Class 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 privateBinAttributes getBinAttributes(Map<PropertyKey, PropertyValue> properties, BinAttributes.Builder builder) { properties.forEach((k, v) -> { switch(ContainerPrope...
private static void useEnumInJava() { String typeName = "f5"; TYPE type = TYPE.fromTypeName(typeName); if (TYPE.BALANCE.equals(type)) { System.out.println("根据字符串获得的枚举类型实例跟枚举常量一致"); } else { System.out.println("大师兄代码错误"); } } /** * 季节枚举(不带参数的...
* in its enum declaration, where the initial constant is assigned * an ordinal of zero). * * Most programmers will have no use for this method. It is * designed for use by sophisticated enum-based data structures, such * as {@link java.util.EnumSet} and {@link java.util.EnumMap}. ...
Methods inherited from class java.lang.Object getClass,notify,notifyAll,wait,wait,wait Constructor Detail Enum protected Enum(Stringname, int ordinal) Sole constructor. Programmers cannot invoke this constructor. It is for use by code emitted by the compiler in response to enum type declarations. ...
A specialized Set implementation for use with enum types. Methods in java.util with type parameters of type Enum Modifier and TypeMethodDescription static <E extends Enum<E>>EnumSet<E> EnumSet.allOf(Class<E> elementType) Creates an enum set containing all of the elements in the specified ele...
UnicodeCase 64 This constant specifies that a Patternthat uses case-insensitive matching will use Unicode case folding. CanonEq 128 This constant specifies that a character in a Patternand a character in the input string only match if they are canonically equivalent. UnicodeCharacterClass 256 Remarks...
所以EnumTypeHandler对我们来说并不适用,因为它在java Bean转数据库数据时获取的是枚举的name而不是value。 而EnumOrdinalTypeHandler存入数据库的是参数的位置,所以这两个处理器都不是我们想要的。但是我们可以根据EnumTypeHandler的设计思想转变一下,变成符合我们想要的统一处理器。
java.lang.Object java.lang.Enum com.microsoft.azure.documentdb.MediaReadMode public enum MediaReadMode extends java.lang.Enum<MediaReadMode>Represents the mode for use with downloading attachment content (aka media) from the Azure Cosmos DB database service....
Enum values can be referenced scoped from their type, Suit::Heart, or first imported with use Suit::* and then used unqualified. Because they're a full type, they can be used in function signatures. Enums are almost always used with either match or if let, the latter of which being ...