Account.java

public class Account {

    private int number;
    private double balance;

    public Account(int number) {
        this(number, 0.0);
    }

    public Account(int number, double balance) {
        this.number = number;
        this.balance = balance;
    }

    public void setNumber(int number) {
        this.number = number;
    }

    public int getNumber() {
        return number;
    }

    public void setBalance(double balance) {
        this.balance = balance;
    }

    public double getBalance() {
        return balance;
    }

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

    public void withdraw(double amount) {
        setBalance(this.balance - amount);
    }

    public String toString() {
        return String.format("Account %d with amount %.2f", getNumber(),
                getBalance());
    }
} // end of Account