Kotlin's main inheritance solution
How to create a new one SavingAccount
with init values for owner
andbalance
open class BankAccount(val owner: String = "Long John Silver", private var balance: Double = 0.00) {
constructor (amount: Double) : this() {
this.balance = amount
}
fun deposit(amount: Double){
this.balance += amount
}
fun withdraw(amount: Double){
this.balance -= amount
}
fun getBalance(): Double{
return this.balance
}
}
And the child class
class SavingAccount(val increasedBy: Double = 0.05): BankAccount(){
fun addInterest(): Unit{
val increasedBy = (this.getBalance() * increasedBy)
deposit(amount = increasedBy)
}
}
and mostly
fun main(args: Array<String>) {
val sa = SavingAccount();// how to do this SavingAccount("Captain Flint", 20.00)
println(sa.owner)
println(sa.owner)
}
How to create SavingAccount
for a new user without default values?
+3
source to share
2 answers
You can implement it with normal constructor arguments (hence no properties) and pass them in your BankAccount
class SavingAccount(owner: String,
balance: Double,
val increasedBy: Double = 0.05
): BankAccount(owner, balance) {
}
The default values for SavingAccount
can be defined similarly BankAccount
:
class SavingAccount(owner: String = "Default Owner",
balance: Double = 0.0,
val increasedBy: Double = 0.05
): BankAccount(owner, balance) {
}
+7
source to share