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 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, FALL}. This allows you to associate specific values with each enum constant...
For example, Size pizzaSize; Here, pizzaSize is a variable of the Size type. It can only be assigned with 4 values. pizzaSize = Size.SMALL; pizzaSize = Size.MEDIUM; pizzaSize = Size.LARGE; pizzaSize = Size.EXTRALARGE; Example 2: Java Enum with the switch statement enum Size { ...
By default,enums don’t require constructordefinitions and their default values are always the string used in the declaration. Though, you can give define your own constructors to initialize the state of enum types. For example, we can addangleattribute to direction. All directions have some an...
};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...
publicenumColor{RED,GREEN,BLUE;publicstaticColorfromString(Stringcolor){for(Colorc:Color.values()){if(c.name().equalsIgnoreCase(color)){returnc;}}thrownewIllegalArgumentException("No constant with text "+color+" found");}} 在这个示例中,我们定义了一个fromString静态方法,它会遍历Color枚举中的所有...
Java Enum Methods and Implementation Now that we have explored Java Enum with values, let’s look at the built-in methods offered by Java Enum and how we can use them. Java Enum comes equipped with several useful methods likevalues(),valueOf(),name(), andordinal(), among others. These...
To get the value of an enum constant by its key, we can use a static method that iterates over all the values of the enum and returns the matching one based on the key provided. Here is an example method in theColorenum class that retrieves the value based on the 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...
Let’s see a quick example using ourvalueOfLabel()method: assertSame(Element.LI, Element.valueOfLabel("Lithium")); 5. Caching the Lookup Values We can avoid iterating theenumvalues by using aMapto cache the labels. To do this, we define astatic final Mapand populate it when the class ...