1) Enums in Java are type-safe and has there own name-space. It means your enum will have a type for example “Currency” in below example and you can not assign any value other than specified in Enum Constants. public enum Currency {PENNY, NICKLE, DIME, QUARTER}; Currency coin = Cu...
The above code shows howenum Carsfunctionality is used in theenum DriveCars. Which means the functionality is extended. Thename()method in the above code isfinal, which cannot be overridden, and thevalueOfmethod will be generated by the compiler. Both of these methods are a good fit for eac...
By design, this converter is calledEnum.valueOf(Class, String),which means that the given string must match exactly one of the declared enum constants. For instance, let’s consider theLevelenum: public enum Level { LOW, MEDIUM, HIGH } Next, let’s create ahandler methodthat accepts our ...
Polymorphism and Interface Methods in Enums Java enums support polymorphism through interface implementation. This means you can treat different enum constants as instances of their common interface type. For instance: ```java Printable color = Color.RED; color.print(); // Output: Printed RED ``...
You can add data (in the form of fields) and behaviors (in the form of methods) to a typesafe enum. For example, suppose you need to introduce an enum for Canadian coins, and you want the class to provide the means to return the number of nickels, dimes, quarters, or dollars contain...
Means that enum constructor can have default modifier and we can do as belowenum Color { RED.GREEN,BLUE; Color() { } public static void main(String[] args) { Color c = new Color(); }} In the main method below line throws compile time error. Color c = new Color(); <- Color ...
The fundamental difference between WeakHashMap and other Map classes like HashMap, IdentityHashMap, and EnumMap is that its keys are WeakReferences, which means both key and value becomes eligible to garbage collection if a key is no longer referenced from elsewhere in the program. This pro...
The conversion logic is encapsulated in a dedicated method namedconvertEnumToInt. This method efficiently utilizes thevalueOf()method to obtain theenumconstant by its name and subsequently retrieves its ordinal value. This approach provides a concise and effective means of convertingenumsto integers,...
Enumerated types help you to specify what values can be assigned to a variable, making your Java code more readable. This chapter will show you how to use enumerated types to clean up your code in JDK 1.5. What Field Modifier static Means ...
Third, there is the fact that Enum is generic in the first place. It means that some of the methods of class Enum take an argument or return a value of an unknown type (or otherwise depend on an unknown type). As we already know, this unknown type will later be a subtype X of En...