Scala convert string to enum with values

Question

I started learning scala and I have little problem. I want to convert string value into Enum but occur error No value found for "TEST". What mistake did I?

object Function1 extends Enumeration {
    val TEST = Value("1")
    val TES = Value("2")
    val TE = Value("3")
  }
 println(Function1 withName "TEST")

chengpohi · Accepted Answer · 2017-10-04 12:30:38Z

5

You are misunderstanding the name of Enumeration, the name in Enumeration actually is the Value's parameter, for your example should be 1

/** Creates a fresh value, part of this enumeration, called name.

@param name A human-readable name for that value.

@return Fresh value called name.

Value(name: String): Value = Value(nextId, name)

and for withName definition:

Return a Value from this Enumeration whose name matches the argument s. The names are determined automatically via reflection.

answered Oct 4, 2017 at 12:30

chengpohi

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2 Comments

Mateusz Sobczak Over a year ago

Thanks for answer, is it possible to create enum with function like in java?

chengpohi Over a year ago

You can use trait with case object to simulate Java's enum

fcat · Accepted Answer · 2017-10-04 12:14:28Z

4

You should use one of the followings:

println(Function1.TEST)

or

println(Function1.withName("1"))

answered Oct 4, 2017 at 12:14

fcat

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1 Comment

Mateusz Sobczak Over a year ago

Thanks for answer. I thought its work a little difference. Is it possible to create function to each enum like in java?

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