使用枚举代替常量

 1 public enum SumtypeEnum {
 2     DEFALUT("",""),
 3     SUM("sum","求和"),
 4     MAX("max","最大值"),
 5     MIN("min","最小值");
 6     String mStatus;
 7     String mDesc;
 8     SumtypeEnum(String status,String desc){
 9         mStatus=status;
10         mDesc=desc;
11     }
12     
13     public static SumtypeEnum getsumtypeEnum(String status) {
14         for(SumtypeEnum sum:values()) {
15             if(status==sum.mStatus) {
16                 return sum;
17             }
18         }
19         return DEFALUT;
20     }
21 }

1 public class EnumTest {
2     public static void main(String[] args) {
3         SumtypeEnum sum=SumtypeEnum.getsumtypeEnum("sum");
4         System.out.println(sum.mDesc);
5 
6         //输出 "求和"
7     }
8 }