publicclassMain{publicstaticvoidmain(String[]args){Colorcolor=Color.getValueByKey("RED");System.out.println("Enum value: "+color);}} 1. 2. 3. 4. 5. 6. In this example, we call thegetValueByKeymethod with the key “RED” and store the returned enum constant in thecolorvariable. ...
您可以通过重写._generate_next_value_()方法来调整此默认行为,该方法在后台使用自动生成值。 # 您可以通过重写 ._generate_next_value_() 方法来调整此默认行为,该方法在后台使用自动生成值。classCardinalDirection(Enum):def_generate_next_value_(name, start, count, last_values):returnname[0] NORTH = au...
MONDAYTUESDAYWEDNESDAYTHURSDAYFRIDAYSATURDAYSUNDAY- String value+Weekday(value: String)+String getValue()+String getValueByKey(key: String) 结语 在本文中,我们介绍了如何使用Java Enum来根据key取值。通过在枚举类型中定义静态方法,并根据key返回对应的值,我们可以很方便地实现这个功能。枚举类型可以有效地组织常...
先解决问题:通过value 获取key,通过key 获取value 参照下方原理解释。 public enum NationalityEnum { HAN("01","汉族"); NationalityEnum(String code, String desc) { this.code = code; this.desc = desc; } private String code; private String desc; public String getCode() { return code; } public...
EnumMap中的 key是enum类型,而value则可以是任意类型。 枚举映射在内部表示为数组。此表示形式非常紧凑且高效。 EnumMap 将丰富的和安全的 Map 接口与数组快速访问结合到一起,如果你希望要将一个枚举类型映射到一个值,你应该使用 EnumMap。 枚举映射根据其键的自然顺序来维护(该顺序是声明枚举常量的顺序)。
Specifies key codes and modifiers. This enumeration supports a bitwise combination of its member values. C# Copy [System.ComponentModel.TypeConverter(typeof(System.Windows.Forms.KeysConverter))] [System.Flags] public enum Keys Inheritance Object ValueType Enum Keys Attributes TypeConverterAttribute Flags...
如果不想写枚举值后的字符串,也可以使用隐式RawValue分配,如下所示 <!--String类型--> enum Week: String{ case MON, TUE, WED = "WED", THU, FRI, SAT, SUN } <!--Int类型--> //MON是从0开始一次递推,而WED往后是从10开始一次递推
Specifies key codes and modifiers. This enumeration supports a bitwise combination of its member values. C# Copy [System.ComponentModel.TypeConverter(typeof(System.Windows.Forms.KeysConverter))] [System.Flags] public enum Keys Inheritance Object ValueType Enum Keys Attributes TypeConverterAttribute Flags...
Value unlocked lockedReadOnly userDefaultAuthenticationMethod values Expand table Member push oath voiceMobile voiceAlternateMobile voiceOffice sms none unknownFutureValue applicationKeyUsage values Expand table Member sign verify unknownFutureValue applicationKeyType values Expand table Member clientSecret ce...
In the Win32 application programming interface (API) a key value has two halves, with the high-order bits containing the key code (which is the same as a Windows virtual key code), and the low-order bits representing key modifiers such as the SHIFT, CONTROL, and ALT keys....