Explain the concept of Enum Class and how it differs from regular enumerations.

In Android (and Java in general), enum class is an enumeration class that represents a set of constants with the ability to add fields, methods, and constructors.

Differences from regular enumerations (for example, in C or simple constants):

• Type safety — enum is a full-fledged class, and a variable of enum type can only accept the specified values.
• Ability to add behavior — methods and fields can be defined inside the enum.
• Use in switch — enum is convenient to use in selection statements.

Example of enum in Java/Android:

public enum Status {
    NEW(0),
    IN_PROGRESS(1),
    DONE(2);

    private int code;

    Status(int code) {
        this.code = code;
    }

    public int getCode() {
        return code;
    }
}

Thus, enum class is an extended way of defining a fixed set of constants with additional functionality, unlike simple enumerations, which can be just a set of numbers or strings without logic.