A fixed set of constants.
✍️ 2 exercises in this lessonAn enum is a special class representing a fixed group of constants, such as days, levels or order statuses.
enum Level { LOW, MEDIUM, HIGH }Level l = Level.HIGH;for (Level x : Level.values())switch and can have fields and methods.Mastering Java Enums helps you write clean and reliable Java code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.
enum Status {
PENDING("Waiting"), SHIPPED("On the way"), DELIVERED("Arrived");
private final String label;
Status(String label) { this.label = label; }
String label() { return label; }
}
public class Main {
public static void main(String[] args) {
for (Status s : Status.values()) {
System.out.println(s + " -> " + s.label());
}
Status order = Status.valueOf("SHIPPED");
System.out.println(order.ordinal());
}
}PENDING -> Waiting SHIPPED -> On the way DELIVERED -> Arrived 1
Check what you learned in “Java Enums”.
Declare an enum.
Level { LOW, MEDIUM, HIGH }
Which method returns all enum constants?
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