Java接口字段到枚举列表

Question

如何从不同类中的交换机访问这些字段？我需要为每个 LocationType 做一个 switch case。

@FunctionalInterface
public interface LocationType {
    LocationType UNKNOWN = () -> "Unknown Location";
    LocationType MERGE = () -> "Merge Location";
    LocationType REGULAR = () -> "Regular Location";
    LocationType MULTI = () -> "Multi Location";
    LocationType ZONE = () -> "Zone Location";

    String getName();
}

例如，我稍后需要在另一堂课中做的是：

switch (locationList) {
    case LocationType.MERGE:
        break;
    case LocationType.MULTI:
        break;
}

Answer 1

假设您只想通过字符串比较，而不是在此处的枚举列表中进行比较，则可能是一个可能的解决方案。

public enum Locations{   
   
     UNKNOWN{
          public String toString() {
            return "Unknown Location";
          } 
      },
     MERGE{
          public String toString() {
            return "Merge Location";
          } 
      },
    REGULAR{
          public String toString() {
            return "Regular Locaton";
          } 
      },
      MULTI{
          public String toString() {
            return "Multi Location";
          } 
      },
    ZONE{

          public String toString() {
            return "Zone Location";
          } 
      }, }