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Home » Java » Java Programs Java example to demonstrate an enum in switch case. Submitted by Nidhi, on April 04, 2022 Problem statement In this program, we will create a vehicle enumeration using "enum" inside the class Main. Then we will use an enum constant with a switch case inside the main() method and print the appropriate message. Java program to demonstrate an enum in switch case The source code to demonstrate an enum in the switch case is given below. The given program is compiled and executed successfully. // Java program to demonstrate an enum // in switch casepublic class Main { enum Vehicle { BIKE, CAR, BUS } public static void main(String[] args) { String str = "BUS"; switch (Vehicle.valueOf(str)) { case BIKE: System.out.println("BIKE is for 2 persons."); break; case CAR: System.out.println("CAR is for 5 persons."); break; case BUS: System.out.println("BUS is for 50 persons."); break; default: System.out.println("Unknown Vehicle."); break; } }}OutputBUS is for 50 persons. Explanation In the above program, we created an enumeration Vehicle inside class Main. The enum Vehicle contains 3 constants BIKE, CAR, BUS. The Main class also contains a static method main(). The main() method is the entry point for the program, here we created a string initialized with "BUS". Then we converted the string into an enum constant using the valueOf() method and used it in a switch case and printed the appropriate message. Java Enums Programs » Advertisement Advertisement
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Public enum Color { RED("#FF0000"), GREEN("#00FF00"), BLUE("#0000FF"); private final String code; Color(String code) { this.code = code; } public String getCode() { return code; }} Here, the Color enum includes a private field code, which stores the hexadecimal code for each color. The constructor Color(String code) allows for initializing these fields when the constant is created.Using Enum MethodsUtilize the method defined in the enum to perform operations. java Color favoriteColor = Color.BLUE;System.out.println("Favorite Color Code: " + favoriteColor.getCode()); This code sets favoriteColor to Color.BLUE and uses the getCode() method to retrieve and print the hexadecimal value of the color.Enum in Switch StatementsUtilizing Enum in Control StructuresLeverage enums in a switch statement to make decisions based on enum values. java Day day = Day.TUESDAY;switch(day) { case MONDAY: System.out.println("Start of the work week."); break; case FRIDAY: System.out.println("Almost weekend!"); break; default: System.out.println("Midweek days."); break;} This snippet demonstrates using an enum in a switch statement to execute different blocks of code depending on the enum value. Such usage enhances readability and the maintainability of conditional logic.ConclusionThrough defining and using enums in Java, you augment the readability and robustness of your code. Enums offer a structured way to handle fixed sets of constants with optional associated functionalities. Whether you’re managing simple constants like days of the week, or more complex data such as color codes with methods, enums make your Java programs easier to manage and maintain. Harness these strategies in your own development to elevate the clarity and effectiveness of your code.
