Kotlin 面向对象 - 枚举排序

Kotlin 枚举排序

1. 基本排序

enum class Priority {
    LOW,
    MEDIUM,
    HIGH,
    URGENT
}

val priorities = listOf(Priority.HIGH, Priority.LOW, Priority.URGENT, Priority.MEDIUM)

println("排序前：" + priorities)

val sortedPriorities = priorities.sorted()

println("排序后：" + sortedPriorities)

# 输出结果

排序前：[HIGH, LOW, URGENT, MEDIUM]
排序后：[LOW, MEDIUM, HIGH, URGENT]

2. 自定义排序

enum class Status(val code: Int, val description: String) {
    PENDING(1, "待处理"),
    APPROVED(3, "已批准"),
    REJECTED(2, "已拒绝")
}

val sortedByCode = Status.values().sortedBy { it.code }

println(sortedByCode)

# 输出结果

[PENDING, REJECTED, APPROVED]