package bigbank; import java.util.HashMap; import java.util.Map; public class BankDaoStub implements BankDao { private long id = 0; private final Map accounts = new HashMap(); public void createOrUpdateAccount(Account account) { if (account.getId() == -1) { id++; account.setId(id); } accounts.put(new Long(account.getId()), account); System.out.println("SAVE: " + account); } public Account[] findAccounts() { Account[] accounts = this.accounts.values().toArray(new Account[] {}); System.out.println("Returning " + accounts.length + " account(s):"); for (Account account : accounts) { System.out.println(" > " + account); } return accounts; } public Account readAccount(Long id) { return accounts.get(id); } }