枚举神秘之处

7 8String description;

9 10OrdinalEnum(String description){

11this.description = description;

12} 13

14public String getDescription() { 15return description;

16} 17

21 22public static void main(String[] args) {

Ӟᛱ switch ޾զݢ enum Ӟ᩸ᬳአ҅๶຅᭜Ӟӻੜࣳጱᇫா᫨ഘ๢̶

1enum Signal { 2GREEN, YELLOW, RED

3} 4

5public class TrafficLight { 6Signal color = Signal.RED;

7 8public void change() {

9switch (color) { 10case RED:

11color = Signal.GREEN;

12break;

13case YELLOW:

14color = Signal.RED;

15break;

16case GREEN:

17color = Signal.YELLOW;

18break;

19} 20}

21}

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ຍԈᐟᑃԏ॒