Bank Account Project

Question

Help!!! There are alot of things that we need to do in order to finish our project for tomorrow. We didn't start last minute so dont criticize us. We are not java programmers and we try to comprehend as much as we can but we are stuck. If anyone can help us on our project, it would be greatly appreciated.
Here is our code, comments are on the top of the code.
Right now the code works but we need to get the main menu correct. We need to stop looping so that the next menu can come up if selected from the previous menu.
* Bank_Main_Menu.java
* Created on April 8, 2004, 8:58 PM
/* The save routine (a hack)
* Bank public String toFileString() {
* return getName() + "|" +
* getAddress1() + "|" +
* getAddress2() + "|" +
/* Menu Structure
* MAIN MENU
* Exit (Leave Program)
* Load from File
* Load from Database**
* Save to File // Do not SAVE if nothing has been loaded!!!
* Save To Database
* (Go to the Bank Menu) // Make sure you create an EMPTY BANK OBJECT!
* Bank Menu // All menus should be in a while (true) and exit on 0!!
* 0) Exit (to Main Menu)
* Edit Bank Info // bank.edit();
* View Bank Info // bank.view();
* Edit Account
* View Account
* Delete Account
* Create Account
* ACCOUNTS MENUS (Sort of shared except Create!)
* 0) Exit
* X) Display Account for EACH item in the bank.vAccounts Vector
* Given user input idx > 0
* - Edit : ( (GenericAccount) bank.vAccounts.elementAt( idx-1 ) ).edit();
* - View : ( (GenericAccount) bank.vAccounts.elementAt( idx-1 ) ).view();
* - Delete : bank.deleteAccount( idx-1 );
* Adding A Checking Account:
* bank.addAccount( new CheckingAccount().edit() ); // edit() must return this;
* Adding A Saving Account:
* bank.addAccount( new SavingsAccount().edit() ); // edit() must return this;
* public void edit() // For the Bank
* { System.out.println("Thank you for editing the bank info "); }
import java.sql.*;
import java.util.Vector;
import java.io.*;
* @author cbolanos
public class Bank_Main_Menu {
final static int MAX_COL_WIDTH = 40;
final static String NULL_COL_VALUE = " ";
final static String driverClass = "sun.jdbc.odbc.JdbcOdbcDriver";
final static String connectionURL = // Uncommment one below to work for you
"jdbc:odbc:MS Access Database;DBQ=C:\\Program Files\\Microsoft Office\\Office11\\Samples\\Northwind.mdb";
//"jdbc:odbc:MS Access Database;DBQ=C:\\Program Files\\Microsoft Office\\Office\\Samples\\Northwind.mdb";
//"jdbc:odbc:MS Access Database;DBQ=D:\\NorthWind.MDB";
//"jdbc:odbc:Northwind"; // Comment this out if you use another
final static String userID = "sa";
final static String userPassword = "";
private Connection con = null; // We assume 1 connection/object
public Bank_Main_Menu() {
public void openConnection() throws ClassNotFoundException, InstantiationException, IllegalAccessException, SQLException {
System.out.print(" Loading JDBC Driver -> " + driverClass + "\n");
Class.forName(driverClass).newInstance();
System.out.print(" Connecting to -> " + connectionURL + "\n");
this.con = DriverManager.getConnection(connectionURL, userID, userPassword);
System.out.print(" Connected as -> " + userID + "\n\n");
public void closeConnection() {
try {
System.out.print(" Closing Connection...\n");
con.close();
catch (SQLException e) {
e.printStackTrace();
public ResultSet executeQuery(String sSQL) throws SQLException {
ResultSet rs = null;
try {
Statement statement = con.createStatement();
rs = statement.executeQuery(sSQL);
catch (SQLException e){
System.out.println("SQLException was thrown in executeQuery: " + e.getMessage());
throw e;
return rs;
public static String padString(String str, int size){
if (str == null) return NULL_COL_VALUE; // Null strings
StringBuffer result = new StringBuffer(str);
while (result.length() < size)
result.append(" ");
if (result.length() > size)
result.substring(0,size);
return result.toString();
public void displayRows(ResultSet rs, Vector vSizes) throws SQLException {
try {
int cnt = rs.getMetaData().getColumnCount();
while(rs.next()) {
for (int x=1; x<=cnt; x++){
int z = ((Integer) vSizes.elementAt(x-1)).intValue();
System.out.print(padString( rs.getString(x), z) );
System.out.println();
catch (SQLException e){
System.out.println("SQLException was thrown in displayRows: " + e.getMessage());
throw e;
public void displayHeaders(ResultSet rs, Vector vSizes) throws SQLException {
try {
ResultSetMetaData md = rs.getMetaData();
for (int x=1; x<=md.getColumnCount(); x++){
int z = Math.max(MAX_COL_WIDTH, md.getColumnDisplaySize(x));
vSizes.add( new Integer( z ));
System.out.print( padString(md.getColumnLabel(x), z) );
System.out.println();
catch (SQLException e) {
System.out.println("SQLException was thrown in displayHeaders: " + e.getMessage());
throw e;
System.out.println("");
public Vector resultToVector(ResultSet rs, Vector vNames) throws SQLException {
try {
String name;
while(rs.next()) {
name = rs.getString(1) + " " + rs.getString(2);
vNames.add(name);
catch (SQLException e){
System.out.println("SQLException was thrown in displayRows: " + e.getMessage());
throw e;
return vNames;
public String getFileName(ResultSet rs) throws SQLException {
try {
String columnLabels = "";
ResultSetMetaData md = rs.getMetaData();
for (int x=1; x<=md.getColumnCount(); x++){
columnLabels = columnLabels + md.getColumnLabel(x);
if(x==md.getColumnCount()){
//last column should not add '_'
else{
columnLabels = columnLabels + "_";
return columnLabels;
catch (SQLException e){
System.out.println("SQLException was thrown in displayHeaders: " + e.getMessage());
throw e;
/* public String getFileHeader(ResultSet rs) throws SQLException {
try {
String columnLabelspayInterest = "";
ResultSetMetaData md = rs.getMetaData();
for (int x=1; x<=md.getColumnCount(); x++){
columnLabels = columnLabels + md.getColumnLabel(x) + "[" + md.getColumnDisplaySize(x) + "]";
if(x==md.getColumnCount()){
//last column should not add '_'
else{
columnLabels = columnLabels + "_";
return columnLabels;
catch (SQLException e){
System.out.println("SQLException was thrown in displayHeaders: " + e.getMessage());
throw e;
private static void writeFile(String sFileName, Vector vData){
try{
String str;
String FilePath = "c:/LEC-12/" + sFileName;
PrintWriter pw = new PrintWriter(new FileWriter(FilePath)); //reading file into the buffer
for(int i = 0; i < vData.size(); i++){
str = (String)vData.elementAt(i).toString();
pw.println(str); //print name in good.txt, bad.txt, average.txt
//System.out.println(str);
pw.close();
catch(Exception e){
public void WritingToFile() throws IOException {
public void writeToFile(Vector vData){
try{
String str;
String FilePath="c:\\java\\save.txt";
PrintWriter pw = new PrintWriter(new FileWriter(FilePath));
for (int i=0; i < vData.size(); i++) {
str=(String)vData.elementAt(i).toString();
pw.println(str);
pw.close();
catch(Exception e)
public static Vector stringToVector(String sLine, String sDelim) {
Vector v = new Vector();
String s = new String(sLine);
int x = sLine.indexOf(sDelim);
while (x >= 0) {
String sPiece = s.substring(0, x);
v.add(sPiece);
s = s.substring(x + 1).trim();
x = s.indexOf(sDelim);
v.add(s);
return v;
public static void writeVectorToFile(Vector v, String sFileName)
throws FileNotFoundException, IOException {
BufferedWriter fileOut = new BufferedWriter(new FileWriter(sFileName));
for (int x = 0; x < v.size(); x++) {
fileOut.write(v.elementAt(x).toString());
if (x != v.size()-1) fileOut.write("\n");
fileOut.close();
public static void writeVectorToFile(Vector v, String sFileName)
throws FileNotFoundException, IOException {
BufferedWriter fileOut = new BufferedWriter(new FileWriter(sFileName));
for (int x = 0; x < v.size(); x++) {
fileOut.write(v.elementAt(x).toString());
if (x != v.size()-1) fileOut.write("\n");
fileOut.close();
/** Creates a new instance of Bank_Main_Menu */
BankSystem(DataManager dataManager) throws java.io.IOException
this.dataManager=dataManager;
reader=new BufferedReader(new InputStreamReader(System.in));
writer=new BufferedWriter(new OutputStreamWriter(System.out));
//////////////////////////////////////MAIN MENU/////////////////////////////////
public void LoadfromFile() {
String fileName = "c:/java/names.txt" ;
String line;
try {
BufferedReader in = new BufferedReader(
new FileReader( fileName ) );
line = in.readLine();
while ( line != null ) // continue until end of file
System.out.println( line );
line = in.readLine();
in.close();
catch ( IOException iox ) {
System.out.println("Problem reading " + fileName );
//private BufferedReader reader;
// System.out.println(" Loading from file");
//System.out.println(" ");
public void LoadfromDatabase() {
Vector vSizes = new Vector();
Bank_Main_Menu mainPrg = new Bank_Main_Menu();
try {
mainPrg.openConnection();
try {
ResultSet rs = mainPrg.executeQuery("SELECT Title,LastName,FirstName,City,Region FROM Employees order by Title,lastname");
mainPrg.displayHeaders(rs, vSizes);
mainPrg.displayRows(rs, vSizes);
catch (Exception e) { e.printStackTrace(); }
finally {     mainPrg.closeConnection(); }
catch (ClassNotFoundException e) { e.printStackTrace(); }
catch (InstantiationException e) { e.printStackTrace(); }
catch (IllegalAccessException e) { e.printStackTrace(); }
catch (SQLException e) { e.printStackTrace(); }
catch (Exception e) {
System.out.println("Exception was thrown in main(): " + e.getMessage());
e.printStackTrace();
//private BufferedReader reader;
System.out.println(" Loading from Database");
System.out.println(" ");
public void WriteToFile(){
Vector vSizes=new Vector();
Vector vNames=new Vector();
vNames.add("Sheila");
WritingToFile wf = new WritingToFile();
String FileName;
wf.writeToFile(vNames);
System.out.println(" Saving to file");
//System.out.println(" ");
public void SavetoDatabase(){
System.out.println(" Saving to Database");
System.out.println(" ");
//////////////////////////////////////BANK MENU////////////////////////////////
public void GotoBankMenu(){
System.out.println("Welcome to the bank Menu");
System.out.println(" Bank Menu ");
System.out.println(" 0. Exit");
System.out.println(" 1. Edit Bank Information");
System.out.println(" 2. View Bank Information");
System.out.println(" 3. Edit Account");
System.out.println(" 4. View Account ");
System.out.println(" 5. Delete Account ");
System.out.println(" 5. Create Account ");
public void bankDetails() {
public void listAccounts(){
System.out.println("These are the accounts");
public void accountOptions(){
System.out.println("These are the account options");
public void add_Account(){
System.out.println("This is how you add an account");
/* public void deleteAcc() throws IOException {
int i = selectAnAccount();
if (i >= 0) {
vBankAccounts.remove(i);//vBankAccounts is the vector object and remove() is a method
System.out.println("Account deleted.");
public void payInterest() throws IOException {
int count = 0;
for (int x = 0; x < vBankAccounts.size(); x++) {
if (vBankAccounts.get(x) instanceof SavingsAccount) {
((SavingsAccount)vBankAccounts.get(x)).addInterestTransaction();
count++;
// public void addAcc(GenericAccount a) {
// vBankAccounts.add(a);
public void payInterest(){
System.out.println("This is how you pay interest");
public void print_statementofAccount(){
System.out.println("This is how you print a statement");
public void loadAccountsFromFile(){
System.out.println("This is how you load an account from file");
public void loadAccountsfromDatabase(){
System.out.println("This is how you load an account from a database");
public void StoreAccounts(){
System.out.println("This is how you store an account");
public static int menu() {
System.out.println("Welcome to the main menu. Please choose from the following options:");
System.out.println(" MAIN MENU ");
System.out.println(" 0. Exit");
System.out.println(" 1. Load from File");
System.out.println(" 2. Load from Database");
System.out.println(" 3. Save to file");
System.out.println(" 4. Save to Database");
System.out.println(" 5. Go to Bank the Bank Menu");//need to create an instance of bank class that contains the elements of bank menu.
System.out.println(" 6. Print Statement of Account");
System.out.println(" 7. Pay Interest");
System.out.println(" 8. Load Accounts from file");
System.out.println(" 9. Load Accounts from Database");
System.out.println("10. Store Accounts");
System.out.println(" MAIN MENU ");
System.out.println(" 0. Exit");
System.out.println(" 1. Edit Bank Information");
System.out.println(" 2. List Accounts");
System.out.println(" 3. Account Options");
System.out.println(" 4. Add an Account ");
System.out.println(" 5. Delete Account ");
System.out.println(" 6. Print Statement of Account");
System.out.println(" 7. Pay Interest");
System.out.println(" 8. Load Accounts from file");
System.out.println(" 9. Load Accounts from Database");
System.out.println("10. Store Accounts");
MAIN MENU
* Exit (Leave Program)
* Load from File
* Load from Database**
* Save to File // Do not SAVE if nothing has been loaded!!!
* Save To Database
* (Go to the Bank Menu)
int OptionChosen;
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
try {
OptionChosen = Integer.parseInt(in.readLine());
catch (Exception e) {
OptionChosen = 0;
return OptionChosen;
* @param args the command line arguments
public static void main(String[] args) {
Bank_Main_Menu bBank = new Bank_Main_Menu(); //Creating an object of the class
while ( true ) {
int userInput = menu();
if (userInput==0) {
System.out.println(" Good Bye ");
return;
System.out.println("You chose " + userInput);
switch(userInput){
case 1:
bBank.LoadfromFile();//Calling a method
break;
case 2:
bBank.LoadfromDatabase();//Calling a method
break;
case 3:
bBank.WriteToFile();//Calling a method
break;
case 4:
bBank.SavetoDatabase();//Calling a method
break;
case 5:
bBank.GotoBankMenu();//Calling a method
break;
case 6:
bBank.print_statementofAccount();//Calling a method
break;
case 7:
bBank.payInterest();//Calling a method
break;
case 8:
bBank.loadAccountsFromFile();//Calling a method
break;
case 9:
bBank.loadAccountsfromDatabase();//Calling a method
break;
case 10:
bBank.StoreAccounts();//Calling a method
break;
while ( true ) {
int userInput = menu();
if (userInput==0) {
System.out.println(" Good Bye ");
return;
System.out.println("You chose " + userInput);
switch(userInput){
case 1:
bBank.bankDetails();//Calling a method
break;
case 2:
bBank.listAccounts();//Calling a method
break;
case 3:
bBank.accountOptions();//Calling a method
break;
case 4:
bBank.add_Account();//Calling a method
break;
case 5:
bBank.delete_Account();//Calling a method
break;
case 6:
bBank.print_statementofAccount();//Calling a method
break;
case 7:
bBank.payInterest();//Calling a method
break;
case 8:
bBank.loadAccountsFromFile();//Calling a method
break;
case 9:
bBank.loadAccountsfromDatabase();//Calling a method
break;
case 10:
bBank.StoreAccounts();//Calling a method
break;

Answer 1

change this:
while ( true ) {
int userInput = menu();
to
int userInput = menu();
while ( userInput != 0 ) {
if (userInput != 5)
userInput = menu();
don't have time to explain too well....