我试图创建一个接口，强制其派生类具有特定属性，但只能使用公共getter.因为我不想允许从它的私有范围之外进行更改，所以我不想让它实现一个公共集.
interface Transaction{
var transferDate: Date get //I only require a get, no set
}
class MoneyTransaction(){
override var transferDate: Date get private set
/*private set does not work*/
}
A property is an accessor to some data. You'll have a getter and if the property is mutable a setter as well. Therefore you can override any declared val property with a var property:
interface Transaction {
val transferDate: Date
}
class MoneyTransaction: Transaction {
override lateinit var transferDate: Date
private set
}
Note that you don't need to make the property a lateinit var if you initialize it with the object; I just added it to have your example compile properly.