// This example extends the Account class to have a user-defined
//    Exception thrown by the withdraw method.
//    

public class AccountException
{ // instance variables
  String name;
  double balance;
  static double interestrate = .04;

  // constructor method is used to initialize instance variables
  public AccountException (String n, double b)
  { name = n;
    balance = b;
  }

  // accessor methods
  public String getname()
  { return name; }

  public double getbalance()
  { return balance; }

  // other methods
  public void withdraw (double amount) throws Exception
  { 
    if ((balance - amount) > 0)
    { balance -= amount;
    }
    else throw new Exception ("Insufficient Funds");
  }

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

  // returns monthly interest and updates balance
  public double monthactivity()
  { double interest = (balance * interestrate)/12;
    balance += interest;
    return interest;
  }
}