for(EnumWithConstructor item : EnumWithConstructor.values()) { System.out.println(item+" "+item.getValue()); } System.out.println(SimpleEnum.UP.ordinal()); } } 总结: 1.枚举本身就是一个类。 2.它不能有public的构造函数,这样做可以保
publicvoidtestUseSeasonEnum() { System.out.println(SeasonEnum.AUTUMN);// AUTUMN // 获取枚举类中定义的所有枚举项(每一项都是枚举,而不是字符串) finalSeasonEnum[] values = SeasonEnum.values(); for(SeasonEnum season : values) { System.out.print(season +" ");// SPRING SUMMER AUTUMN WINTER ...
SinceSizeis an enum class, the compiler automatically creates instances for each enum constants. Here inside themain()method, we have used the instanceSMALLto call thegetSize()method. Note: Like regular classes, an enum class also may include constructors. To learn more about it, visitJava e...
Java enum example. The purpose of enum is to enforce compile time type safety. Learn enum constructors, methods, inheritance, EnumMap and EnumSet etc.
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Enum(String, Int32) Sole constructor. Enum(IntPtr, JniHandleOwnership) A constructor used when creating managed representations of JNI objects; called by the runtime. C# protectedEnum(IntPtr javaReference, Android.Runtime.JniHandleOwnership transfer); ...
publicenumDay{MON DAY(1),TUES DAY(2);privateintvalue;privateDay(intvalue){this.value=value;}}#Output:# MONDAY=1# TUESDAY=2 Java Copy In this example, we’ve defined an enumDaywith two constants:MONDAYandTUESDAY. Each constant is assigned a specific value through the enum’s constructor....
2. Working withEnumMap 2.1. CreatingEnumMap We can createEnumMapby making use of the following constructors: EnumMap(Class keyType): Used to create an emptymap with the specified keyType. EnumMap(EnumMap m): Used to create amap with the samekeytype as the specifiedEnum Map. ...
Enum Constructors and Interface Initialization Enums can have constructors that can be used to initialize fields or perform other tasks during enum constant creation. When an enum implements an interface, constructors can also be used to initialize fields required by the interface methods. For examp...
In this example, we have defined an enum classDaywith constants for each day of the week along with additional fields for abbreviation and ordinal value. The constructor initializes these fields for each constant, and getter methods are provided to access the values. ...