Master of Science thesis Fighting Spam

}
protected void addAccount(BankAccount acc)
{
accounts.put(acc.username, acc);
}
protected boolean removeAccount(BankAccount acc)
{
return(accounts.remove(acc.username) != null);
}
protected double totalbalance()
{
double total = 0;
int i = 0;
for(Enumeration e = accounts.keys(); e.hasMoreElements(); )
{
total += ((BankAccount) e.nextElement()).balance;
}
}
return total;
protected BankAccount getAccount(String username)
{
return(BankAccount) accounts.get(username);
}
public String toString()
{
String s = "BankAccounts:\n";
for(Enumeration e = accounts.elements(); e.hasMoreElements(); )
{
s += " " + ((BankAccount) e.nextElement()).toString() + "\n";
}
return s;
}
public static void main(String[] s)
{
try
{
//Partial Functional test
Accounts accounts = new Accounts(new BankAccount("Bent", "Bent01", 100));
System.out.println(accounts.toString());
BankAccount acc = accounts.getAccount("Bent");
acc.withdraw(9.0);
System.out.println("Withrawed 9.0 from Bents account");
System.out.println(accounts.toString());
acc.deposit(20.0);
System.out.println("Deposit 20.0 to Bents account");
System.out.println(accounts.toString());
acc.withdrawNoteUpFront(5.0);
System.out.println("withdrawNoteUpFront 5.0 from Bents account");
System.out.println(accounts.toString());
acc.withdrawFromUpFront(5.0);
System.out.println("withdrawFromUpFront 5.0 from Bents account");
System.out.println(accounts.toString());
acc.withdrawNoteUpFront(12.0);
System.out.println("withdrawNoteUpFront 12.0 from Bents account");
System.out.println(accounts.toString());
acc.withdrawFromUpFront(20.0);
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