As we delve deeper into the topic, we will shed light on the specifics of Java enums, particularly focusing on enums with values. Let’s embark on this exciting journey into the realm of Java enum and see how it plays a crucial role in the broader field of software engineering. Delving...
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 { ...
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...
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");}} 1. 2. 3. ...
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 ...
// Java program to demonstrate working of values(), // ordinal() and valueOf() enum Color { RED, GREEN, BLUE; } public class Test { public static void main(String[] args) { // Calling values() Color arr[] = Color.values(); // enum with loop for (Color col : arr) { // ...
Let's take another example, import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.io.Serializable; class Dog implements Serializable { String name; String breed; public Dog(String name, String breed) { ...