Account.java

/*
     * DO NOT TOUCH THIS !
     */

    public class Account {

        private double balance;
        private String owner;

        public Account(String owner, double balance) {
            this.balance = balance;
            this.owner = owner;
        }

        public void deposit(double amount) {
            this.balance = this.balance + amount;
        }

        public void withdrawal(double amount) {
            this.balance = this.balance - amount;
        }

        public double balance() {
            return this.balance;
        }

        @Override
        public String toString() {
            return this.owner + " balance: " + this.balance;
        }
    }