<分区>
我想在 Java 中将整数映射到枚举。整数需要是键，枚举是值。我见过的所有示例都以枚举作为值，以整数作为键。我有:
enum CardStatus {
UNKNOWN, // 0 should map to this
PENDING, // 1 should map to this
ACTIVE // 2 should map to this
public CardStatus getCardStatus(int cardStatus) {
// e.g. cardStatus of 1 would return PENDING
}
}
如何调用 getCardStatus() 并取回 CardStatus 枚举？例如。 getCardStatus(2) 将返回 ACTIVE
最佳答案
您可以使 getCardStatus() 静态化:
enum CardStatus {
UNKNOWN, // 0 should map to this
PENDING, // 1 should map to this
ACTIVE; // 2 should map to this
public static CardStatus getCardStatus(int cardStatus) {
return CardStatus.values()[cardStatus];
}
}
并使用它:
System.out.println(CardStatus.getCardStatus(0));
关于java - 将 java 枚举映射到整数，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/55106101/