What is wrong with this code?Overriding java

Question

import java.util.Scanner;
class Main {
public static void main(String[] args) {
Scanner read = new Scanner(System.in);
double saving = read.nextDouble();
double checking = read.nextDouble();

Account savingAcc = new SavingAcc(saving);
Account checkingAcc = new CheckingAcc(checking);

System.out.println(savingAcc.getIncome());
System.out.println(checkingAcc.getIncome());
}
}
class Account {

private double amount;

public Account(double amount) {
this.amount = amount;
}

public double getAmount() {
return amount;
}

public double getIncome() {
return 0;
}
}

class SavingAcc extends Account {

public SavingAcc(double amount) {
super(amount);
}
//Override the method for saving account
public double getIncome(double saving) {
System.out.println(saving+saving*0.2);
}
}
class CheckingAcc extends Account {

public CheckingAcc(double amount) {
super(amount);
}
//Override the method for checking account
public double getIncome(double checking) {
System.out.println(checking+checking*0.05);
}
}

Answer 1

Hi👋 Софія,
the first thing I saw, is that both getIncome (in Saving and Checking classes) have to return a double, also in getIncome take a double as an argument but you passe nothing to it, I suggest :
public double getIncome() {
return getAmount() + getAmount() * xxx ;
}

Answer 2

In Java you need to add parameter list in your example your Account getIncome method:

public double getIncome(){double amount){
return 0;
}

Java is checking the methods parameter list, and the return type,
I hope its helping you

Answer 3

If you want parameter you need to add parameter in the parent class method