public class Example {    static void Main () {        System.Console.WriteLine ("Hello, world!") ;    }}

public class Account {    private String accountName;    private String accountNumber;    private double balance;    public void deposit (double amount) {        balance = balance + amount;    }    public void withdraw (double amount) {        balance = balance - amount;    }    public String getAccountName () {        return accountName;    }    public void setAccountName (String name) {        accountName = name;    }    public String getAccountNumber () {        return accountNumber;    }    public void setAccountNumber (String number) {        accountNumber = number;    }    public double getBalance () {        return balance;    }    public void setBalance (double amount) {        balance = amount;    }}