Kotlin - accessing and using constructor parameters-CodePudding

I have this constructor in a class inside my interface (it's supposed to be more like a static structure but for now this is ok)

class BinData {
        constructor(card_id: Int,
                    from: Int,
                    to: Int)
    }

I created an instance, and I want to use all properties inside constructor in a form of a map as an argument for function

val binData = IConfiguration.BinData(2, 222100, 272099)
memoryConfig.binAdd(1, binData)

Of course then, when I printed the line in binAdd() I got Bin added: {1=control.app.activities.IConfiguration$BinData@8bd0008} which is just object hash

What is the reasonable way to approach this? I thought of a creating a method like BinData.getdata() which would return Map of parameters but I'm really not sure that's the way.

For any help I'll be glad. Thanks.

CodePudding user response：

Constructor parameters can only be properties if they are in the primary constructor, declared before the { }. And toString() will only list the property values if your class is a data class or if you override toString() to manually define this behavior.

You should declare your class like this:

data class BinData(
    val card_id: Int,
    val from: Int,
    val to: Int
)

CodePudding user response：

You're just declaring a constructor that receives 3 parameters but you're not specifying that those are properties. I'd recommend you setting a primary constructor with those properties

class BinData(val card_id: Int,
              val from: Int,
              val to: Int)

Notice that I specified those properties as val assuming that they're immutable. If you need to modify them, make them mutable by defining them as var

Consider also using a data class if your class is meant to only hold values and not logic