Account.java - Sample code for instructional purposes

Account.java

public class Account {
  private String accountNumber;
  
  public Account(String accountNumber) {
    // Constructor
    this.accountNumber = accountNumber;  
  }
  
  public String getAccountNumber() {
    return accountNumber;  // return the account number
  }
  
  public ArrayList getTransactions() throws Exception {
    try {
      // Get the list of transactions
      List dbTransactionList = Db.getTransactions(accountNumber.trim());
      
      ArrayList transactionList = new ArrayList();
      int i;
      for(i = 0; i < dbTransactionList.size(); i++) {
        DbRow row = (DbRow) dbTransactionList.get(i);
        Transaction trans = makeTransactionFromDbRow(row);
        transactionList.add(trans);
      }
      return transactionList;
      
    } catch (SQLException ex) {
      // There was a database error
      throw new Exception("Can't retrieve transactions from the database");
    }
  }
  
  public Transaction makeTransactionFromDbRow(DbRow row) {
    double currencyAmountInPounds = Double.parseDouble(row.getValueForField("amt"));
    String description = row.getValueForField("desc");
    return new Transaction(description, currencyAmountInPounds);  // return the new Transaction object
  }
  
  // Override the equals method
  public boolean equals(Account o) {
    return o.getAccountNumber() == getAccountNumber(); // check account numbers are the same
  }
}