enums injava

1
2public class EnumTest {
3    Day day;
4    
5    public EnumTest(Day day) {
6        this.day = day;
7    }
8    
9    public void tellItLikeItIs() {
10        switch (day) {
11            case MONDAY:
12                System.out.println("Mondays are bad.");
13                break;
14                    
15            case FRIDAY:
16                System.out.println("Fridays are better.");
17                break;
18                         
19            case SATURDAY: case SUNDAY:
20                System.out.println("Weekends are best.");
21                break;
22                        
23            default:
24                System.out.println("Midweek days are so-so.");
25                break;
26        }
27    }
28    
29    public static void main(String[] args) {
30        EnumTest firstDay = new EnumTest(Day.MONDAY);
31        firstDay.tellItLikeItIs();
32        EnumTest thirdDay = new EnumTest(Day.WEDNESDAY);
33        thirdDay.tellItLikeItIs();
34        EnumTest fifthDay = new EnumTest(Day.FRIDAY);
35        fifthDay.tellItLikeItIs();
36        EnumTest sixthDay = new EnumTest(Day.SATURDAY);
37        sixthDay.tellItLikeItIs();
38        EnumTest seventhDay = new EnumTest(Day.SUNDAY);
39        seventhDay.tellItLikeItIs();
40    }
41}
42

1
2public enum Day {
3    SUNDAY, MONDAY, TUESDAY, WEDNESDAY,
4    THURSDAY, FRIDAY, SATURDAY 
5}
6