Java enum类型笔记

1 public enum Weekend {
2     SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY;
3     
4     public static void main(String[] args) {
5         for (Weekend day : Weekend.values()) {
6             System.out.println(day);
7         }
8     }
9 }

 1 public enum Direction {
 2     EAST("d"), WEST("a"), SOUTH("s"), NORTH("w"); // 用键盘上的wasd键代表方向
 3 
 4     private String key;
 5 
 6     private Direction(String key) {
 7         this.key = key;
 8     }
 9 
10     public String getKey() {
11         return key;
12     }
13 
14     public static void main(String[] args) {
15         for (Direction d : Direction.values()) {
16             System.out.println("direction map:" + d.getKey());
17         }
18     }
19 
20 }