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import java.util.HashMap;
import java.util.Map;
public class AccountManager {
private Map<Integer, Account> accounts = new HashMap<>();
/*
This is a called a constructor. It gets executed when an object of this class is
created.
*/
public AccountManager() {
// For testing, create some account objects.
// In a real systems, account data will be in a storage system like a database.
Account account = new Account(1, 10.0);
accounts.put(account.getAccountNumber(), account);
account = new Account(2, 20.0);
accounts.put(account.getAccountNumber(), account);
account = new Account(3, 10.0);
accounts.put(account.getAccountNumber(), account);
}
public void withdraw(int accountId, double amount) {
Account account = accounts.get(accountId);
account.setBalance(account.getBalance() - amount);
}
public void deposit(int accountId, double amount) {
Account account = accounts.get(accountId);
account.setBalance(account.getBalance() + amount);
}
public double getBalance(int accountId) {
return accounts.get(accountId).getBalance();
}
}
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