In Java, you can assign values to enums by defining a constructor and a private variable in the enum. For example an enum for Seasons of the year will have 4 constants:public enum Season {WINTER, SPRING, SUMMER,
In Java, an enum (short for enumeration) is a type that has a fixed set of constant values. We use theenumkeyword to declare enums. For example, enumSize { SMALL, MEDIUM, LARGE, EXTRALARGE } Here, we have created an enum namedSize. It contains fixed valuesSMALL,MEDIUM,LARGE, andEXTR...
Creategetter methodsso we can access any of the values assigned to a particular enum constant Create areverse lookupmethod so we can get the enum constant from any given enum value assigned to it 2. Example of Enum with Multiple Values In the given example, we are creating an enumAccountSta...
In thisguide to Javaenumwith string values, learn tocreate enum using strings, iterate over all enum values, get enum value and perform a reverse lookup tofind an enum by stringparameter. We should always createenumwhen we have a fixed set of related constants.Enums are inherently singleton,...
};publicstatichr.test.Color[] values();//实现Enum类的抽象方法publicstaticcom.dxz.enumtest.Color valueOf(java.lang.String arg0); } 下面我们就详细介绍enum定义的枚举类的特征及其用法。(后面均用Color举例) 1、Color枚举类就是class,而且是一个不可以被继承的final类。其枚举值(RED,BLUE...)都是Color...
Similarly, we can add any values we want to theenum, such as the proper case symbols, “He”, “Li” and “Be”, for example. Moreover, we can add computed values to ourenumby adding methods to perform operations. 7. Controlling the Interface ...
Here is an example method in theColorenum class that retrieves the value based on the key: publicstaticColorgetValueByKey(Stringkey){for(Colorcolor:Color.values()){if(color.name().equalsIgnoreCase(key)){returncolor;}}thrownewIllegalArgumentException("Invalid key: "+key);} ...
valueOf(Class<T> enumType, String name):根据指定的枚举类型和名称,返回对应的枚举常量。 此外,Enum类还包含一些其他的保护方法,如clone()、finalize()和反序列化相关的方法。 需要注意的是,枚举类型在编译时会由编译器自动生成一些方法,如values()和valueOf(String)方法,用于获取枚举类型的所有常量和根据名称获...
Instances of the class Class represent classes and interfaces in a running Java application. An enum is a kind of class and an annotation is a kind of interface...
问Java8:将EnumMap<ExampleEnum、String>转换为Map<String、Object>ENMap<String,Object>newMap=map....