2/10/2024 0 Comments Java enum class with valuesThis usage of enums within switch.case statements brings multiple benefits. Each enum constant can be associated with a distinct block of code, enabling efficient branching and decision-making within the program flow. This feature allows for a more expressive and structured approach when dealing with a set of predefined values.īy utilizing an enum within a switch.case statement, developers can easily handle different cases based on the specific enum constant. Enum switch.case Example :Īn enum type can also be employed within a switch.case statement, similar to how one would use primitive data types like int or char. Whether it is using enum constants as method parameters or incorporating them as variables, enums provide a robust mechanism to enforce type safety and reduce the likelihood of errors resulting from incompatible or incorrect values. The versatility of enum types allows for seamless integration within various components of a Java program. This streamlined approach enhances code readability and maintains a clear and intuitive representation of the predefined set of instances. Enum types offer a concise and straightforward solution in such cases, eliminating the need for a full-fledged class structure. For instance, scenarios such as representing the days of the week (Sunday, Monday, etc.) or cardinal directions (NORTH, SOUTH, EAST, and WEST) call for the utilization of enums.īy utilizing an enum instead of a class, developers can effectively handle situations where the number of instances remains fixed and enumerable. Enum types find their purpose when a variable, particularly a method parameter, is restricted to a limited set of possible values. When should I use?Įnum types prove to be a valuable asset whenever the requirement arises to portray a definitive and unchanging collection of constants. Strengths of the language and I encourage you to use more of them in your code.The main advantage of Enum is that it make your code more explicit, less error-prone and in a self-documenting way. I think Java enums are one of the greater Very often we are still under utilising the older set of language features. There is a lot of attention on the new Java features and what they bring, but Final WordsĮnum in Java is a very powerful construct. It is useful to know when mixing strategy pattern and enums in general. On algorithmic library with a requirement for clients to be able to extend the algorithm. This may look like a non-standard case, but it actually comes up frequently in some domains. Now the client is free to implement its own AdvancesMean enum with the HARMONIC_MEAN member and the library is stillĪble to provide implementation for basic mathematical means. Using Enums in Java it is very easy to implement a lazy loading Singleton: With this reminder of how similar enums are to classes, it should be clear that they can be used for more than simplyĮnumerating things. They have minor differences that won’t be important for the usages mentioned here unless explicitly stated.Methods, fields… They really are like classes, with only a few specific differences: This is quite different to C# where enums are a much simpler type. In Java, enumerated types are kinds of classes which have predefined So let’s try with an informal way of describing them. What are Java enums?Īn enumerated type in Java is a type whose values consist of a fixed set of constants. In this blog post I want to remind you what Java enums canĭo and show some of the usage patterns that don’t get enough attention. To see them either being used incorrectly or not used at all. Even though they can do so much, it is very common Java enums are very powerful and important part of the Java language.
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