Scala中没有枚举类型,定义一个扩展Enumeration类的对象,并以value调用初始化枚举中的所有可能值:
1、extends Enumeration
object TrafficLightColor extends Enumeration {
val Red = Value(0, "Stop")
val Yellow = Value(1, "Slow")
val Green = Value(2, "Go")
}
2、TrafficLightColorMain
object TrafficLightColorMain {
def main(args: Array[String]): Unit = {
println(TrafficLightColor.Red)
println(TrafficLightColor.Red.id)
}
}
转载于:https://www.jianshu.com/p/9c15294bb447