Exercise 2: Using Collections to Represent Association (Level 3)

Task 1 - Modifying the Bank Class

Using a text editor, modify the Bank class source file in the src/com/mybank/domain/ directory. This class must satisfy the UML diagram in Figure 9-2 on page Lab 9-11.

Modify the declaration for the customers attribute to be of type List<Customer>, and drop the numberOfCustomers attribute.
private static List<Customer> customers;

Modify the static block to initialize the customers attribute to be a new ArrayList object.

static {
     customers = new ArrayList<Customer>(f, l);
}

Modify the addcustomer method to use the add method.

public static void addCustomer(String f, String l) {
   customers.add(new Cuetomer (f, l)) ;
}

Modify the getCustomer method to use the get method.

public static Customer getCustomer(int customer_index) { 
     return customers.get(customer_index);
}

Modify the getNumOfCustomers method to use the size method.

public static int getNumOfCustomers() {
     return customers.size();
}

Task 2 - Modifying the Customer Class

Using a text editor, modify the Customer class source file in the src/com/mybank/domain/ directory. This class must satisfy the UML diagram in Figure 9-2 on page Lab 9-11.

Modify the declaration for the accounts attribute to be of type List<Account>, and drop the numberOfAccounts attribute
```
private List<Account> accounts;
```
Modify the constructor to initialize the accounts attribute to be a new ArrayList object.
public Custmor(String f, String l) {
firsmame = f;
lastName = l;
// initialize accounts attribute
accounts = new ArrayList<Account>(10);
}

Modify the addAccount method to use the add method.
         
public void addAccount(Account acct) {
   accounts.add(acct);
}

Modify the getAccount method to use the get method.

public Account getAccount(int account_index) {
   return accounts.get(account_index);
}

Modify the getNumOfAccounts method to use the size method.

public int getNumOfAccounts(){
       return accounts.size();

}

Task 3 - Compiling the TestReport Program

Task 4 - Running the TestReport Program

On the command line, use the java command to run the test program.

java -cp ../classes com.mybank.test.TestReport
../data/test.dat