Banking Application

Description: Application to implement a Banking system that has the following details for a current account customer:
ľ Account Name
ľ Account Number
ľ Sort Code
The system also provides the following services to a customer:
ľ Opening an account
ľ Depositing money in an account
ľ Withdraw money from an account with the condition that the customer cannot withdraw more money than the amount that is present in the account
ľ Ask for a balance of the account
ľ Provide a mini statement showing a maximum of the last 10 transactions
ľ Close an account
ľ The customer can open a joint account that can be shared by 3 people
ľ The customer can have an overdraft of $5000
Assumptions
The program does not save the data of a customer permanently. Thus all data related to a particular session is deleted once the application ends.
The task does not require the application to be a multi user application thus the application is started by opening an account and ended by closing that particular account.



//main
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

//BANKS CLASS INHERITS FROM THE JFRAME CLASS AND IMPLEMENTS ACTIONLISTENERS INTERFACE
public class Banks extends JFrame implements ActionListener{

//DECLARATION SECTION

//DECLARING IMAGEICONS FOR THE BUTTONS
private ImageIcon image1;
private ImageIcon image2;

private ImageIcon image3;
private ImageIcon image4;

private ImageIcon image5;
private ImageIcon image6;

//DECLARING COMPONENTS
private JButton openButton, depositButton, withDrawButton, balanceButton, miniStaButton, closeButton;
private JToolBar bar;
private JTextArea txtTextArea;
private JScrollPane scrBarForTextArea;

//DECLARING THE DIMENSIONS FOR THE BUTTONS
private Dimension buttonSize = new Dimension(200,50);

//DECLARING COLOR THAT ARE TO BE USED
private Color blue = new Color(10,110,255);
private Color white = new Color(255,255,255);

//DECLARING THE FONTS
private Font head = new Font("Castellar",Font.ITALIC,17);

//DECLARING VARIABLES
private String strTemp=null;
private String strAmount = "";
private float amount = 0;

//CREATING OBJECTS OF OTHER CLASSES
private Account current = new Account();
private JAccount joint = new JAccount();

//CONSTRUCTOR FOR THE BANKS CLASS
public Banks(){
super("GENIUSDIP'S BANKS");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container con = getContentPane();
con.setLayout(new BorderLayout());
con.add(getScrBarForTextArea(),BorderLayout.CENTER);

JToolBar bar = new JToolBar(SwingConstants.VERTICAL);

//ADDING BUTTONS TO THE TOOL BAR
bar.add(getOpenButton());
bar.add(getDepositButton());
bar.add(getWithDrawButton());
bar.add(getBalanceButton());
bar.add(getMinaStaButton());
bar.add(getCloseButton());

//DISABLING SOME BUTTONS
setAllBtnsEnabled(false);

//ADDING ACTION LISTENERS TO ALL THE BUTTONS
addActionListenerAllBtns();

//ADDING THE BAR TO THE CONTENT PANE
con.add(bar,BorderLayout.WEST);
}

//FUNCTION THAT RETURNS A TEXTAREA WITH SOME PROPERTIES SET
private JTextArea getTxtTextArea(){
if(txtTextArea==null){
txtTextArea=new JTextArea(10,10);
txtTextArea.setBackground(white);
txtTextArea.setForeground(blue);
txtTextArea.setEditable(false);
txtTextArea.setFont(head);
txtTextArea.setText("\t Geniusdip's Banks \n\n");
}
return txtTextArea;
}


//FUNCTION THAT RETURNS A SCROLLPANE WITH SOME PROPERTIES SET
private JScrollPane getScrBarForTextArea(){
if(scrBarForTextArea==null){
//VIEWING THE TEXTAREA FROM THE SCROLLPANE
scrBarForTextArea=new JScrollPane(getTxtTextArea());
}
return scrBarForTextArea;
}

//FUNCTION THAT RETURNS A BUTTON WITH SOME PROPERTIES SET
private JButton getOpenButton()
{
if(openButton==null)
{
ImageIcon image1 = new ImageIcon("OPENANACCOUNTANI.gif");
openButton=new JButton("",image1);
openButton.setPreferredSize(buttonSize);
}
return openButton;
}

//FUNCTION THAT RETURNS A BUTTON WITH SOME PROPERTIES SET
private JButton getDepositButton()
{
if(depositButton==null)
{
ImageIcon image2 = new ImageIcon("DEPOSIT.gif");
depositButton=new JButton("",image2);
depositButton.setPreferredSize(buttonSize);
}
return depositButton;
}

//FUNCTION THAT RETURNS A BUTTON WITH SOME PROPERTIES SET
private JButton getWithDrawButton()
{
if(withDrawButton==null)
{
ImageIcon image3 = new ImageIcon("WITHDRAW.gif");
withDrawButton=new JButton("",image3);
withDrawButton.setPreferredSize(buttonSize);
}
return withDrawButton;
}

//FUNCTION THAT RETURNS A BUTTON WITH SOME PROPERTIES SET
private JButton getBalanceButton()
{
if(balanceButton==null)
{
ImageIcon image4 = new ImageIcon("BALANCE.gif");
balanceButton=new JButton("",image4);
balanceButton.setPreferredSize(buttonSize);
}
return balanceButton;
}

//FUNCTION THAT RETURNS A BUTTON WITH SOME PROPERTIES SET
private JButton getMinaStaButton()
{
if(miniStaButton==null)
{
ImageIcon image5 = new ImageIcon("MINI.gif");
miniStaButton=new JButton("",image5);
miniStaButton.setPreferredSize(buttonSize);
}
return miniStaButton;
}


//FUNCTION THAT RETURNS A BUTTON WITH SOME PROPERTIES SET
private JButton getCloseButton()
{
if(closeButton==null)
{
ImageIcon image6 = new ImageIcon("CLOSE.gif");
closeButton=new JButton("",image6);
closeButton.setPreferredSize(buttonSize);
}
return closeButton;
}

//FUNCTION TO ENABLE OR DISABLE BUTTONS
private void setAllBtnsEnabled(boolean bool){
getDepositButton().setEnabled(bool);
getWithDrawButton().setEnabled(bool);
getBalanceButton().setEnabled(bool);
getMinaStaButton().setEnabled(bool);
getCloseButton().setEnabled(bool);
}

//FUNCTION TO ADD ACTIONLISTENERS TO BUTTONS
private void addActionListenerAllBtns(){
getOpenButton().addActionListener(this);
getDepositButton().addActionListener(this);
getWithDrawButton().addActionListener(this);
getBalanceButton().addActionListener(this);
getMinaStaButton().addActionListener(this);
getCloseButton().addActionListener(this);
}

//FUNCTION TO SET VARIABLES TO POINT TO NOTHING
private void setVariables(){
strTemp=null;
strAmount = "";
amount = 0;
current = null;
joint = null;
}

//THE ACTION PERFORMED METHOD
//EXECUTES WHEN THE CLICK EVENT IS FIRED
public void actionPerformed(ActionEvent e){

Object source = e.getSource();

//OPEN BUTTON CLICKED
if(source==openButton){
String Name = "";
String ANumber = "";
String Name2 = "";
String Name3= "";

//QUERY THE USER FOR THE NEEDED INFORMATION
do
{
strTemp = JOptionPane.showInputDialog(null,"Please Enter C To Open A Current Account \n Or J To Open A Joint Account");
}while(strTemp==null || strTemp.length()==0);
switch(strTemp.charAt(0)){
case 'c':
case 'C':
//ENABLE ALL OTHER BUTTON EXCEPT THE OPEN BUTTON
setAllBtnsEnabled(true);
openButton.setEnabled(false);
do
{
Name = JOptionPane.showInputDialog(null,"Please Enter The Account Holder's Name");
}while(Name==null || Name.length()==0);
do
{
ANumber = JOptionPane.showInputDialog(null,"Please Enter The Account Number");
}while(ANumber==null || ANumber.length()==0);
current.openAnAccount(Name,ANumber,"Current Account");
txtTextArea.append("Current Account Created With The Following Details \n");
txtTextArea.append("Account Holder's Name:::" + current.getAccountName() + "\n");
txtTextArea.append("Account Number::::::::::" + current.getAccountNumber()+ "\n");
txtTextArea.append("Account Sort Code:::::::" + current.getSortCode()+ "\n");
break;
case 'j':
case 'J':
setAllBtnsEnabled(true);
openButton.setEnabled(false);
String choice = null;
do
{
choice = JOptionPane.showInputDialog(null,"Please Enter 2 If They Are 2 Account Holders For The Joint Account \n Or 3 If They Are 3 Account Holders For The Joint Account");
}while(choice==null || choice.length()==0);
switch(choice.charAt(0)){
case '2':
do
{
Name = JOptionPane.showInputDialog(null,"Please Enter The First Account Holder's Name");
}while(Name==null || Name.length()==0);
do
{
Name2 = JOptionPane.showInputDialog(null,"Please Enter The Second Account Holder's Name");
}while(Name2==null || Name2.length()==0);
do
{
ANumber = JOptionPane.showInputDialog(null,"Please Enter The Account Number");
}while(ANumber==null || ANumber.length()==0);
joint.openAnAccount(Name,Name2,ANumber,"Joint Account");
txtTextArea.append("Joint Account Created With The Following Details \n");
txtTextArea.append("First Account Holder's Name:::" + joint.getAccountName() + "\n");
txtTextArea.append("Second Account Holder's Name:::" + joint.getAccountName2() + "\n");
txtTextArea.append("Account Number::::::::::" + joint.getAccountNumber()+ "\n");
txtTextArea.append("Account Sort Code:::::::" + joint.getSortCode()+ "\n");
break;
case '3':
do
{
Name = JOptionPane.showInputDialog(null,"Please Enter The First Account Holder's Name");
}while(Name==null || Name.length()==0);

do
{
Name2 = JOptionPane.showInputDialog(null,"Please Enter The Second Account Holder's Name");
}while(Name2==null || Name2.length()==0);

do
{
Name3 = JOptionPane.showInputDialog(null,"Please Enter The Third Account Holder's Name");
}while(Name3==null || Name3.length()==0);

do
{
ANumber = JOptionPane.showInputDialog(null,"Please Enter The Account Number");
}while(ANumber==null || ANumber.length()==0);

joint.openAnAccount(Name,Name2,Name3,ANumber,"Joint Account");
txtTextArea.append("Joint Account Created With The Following Details \n");
txtTextArea.append("First Account Holder's Name:::" + joint.getAccountName() + "\n");
txtTextArea.append("Second Account Holder's Name:::" + joint.getAccountName2() + "\n");
txtTextArea.append("Third Account Holder's Name:::" + joint.getAccountName3() + "\n");
txtTextArea.append("Account Number::::::::::" + joint.getAccountNumber()+ "\n");
txtTextArea.append("Account Sort Code:::::::" + joint.getSortCode()+ "\n");
break;
default:
do
{
Name = JOptionPane.showInputDialog(null,"Please Enter The First Account Holder's Name");
}while(Name==null || Name.length()==0);

do
{
Name2 = JOptionPane.showInputDialog(null,"Please Enter The Second Account Holder's Name");
}while(Name2==null || Name2.length()==0);

do
{
Name3 = JOptionPane.showInputDialog(null,"Please Enter The Third Account Holder's Name");
}while(Name3==null || Name3.length()==0);

do
{
ANumber = JOptionPane.showInputDialog(null,"Please Enter The Account Number");
}while(ANumber==null || ANumber.length()==0); joint.openAnAccount(Name,Name2,Name3,ANumber,"Joint Account");
txtTextArea.append("Joint Account Created With The Following Details \n");
txtTextArea.append("First Account Holder's Name:::" + joint.getAccountName() + "\n");
txtTextArea.append("Second Account Holder's Name:::" + joint.getAccountName2() + "\n");
txtTextArea.append("Third Account Holder's Name:::" + joint.getAccountName3() + "\n");
txtTextArea.append("Account Number::::::::::" + joint.getAccountNumber()+ "\n");
txtTextArea.append("Account Sort Code:::::::" + joint.getSortCode()+ "\n");
}
break;
default:
setAllBtnsEnabled(true);
current = new Account();
do
{
Name = JOptionPane.showInputDialog(null,"Please Enter The Account Holder's Name");
}while(Name==null || Name.length()==0);
do
{
ANumber = JOptionPane.showInputDialog(null,"Please Enter The Account Number");
}while(ANumber==null || ANumber.length()==0);
current.openAnAccount(Name,ANumber,"Current Account");
txtTextArea.append("Current Account Created With The Following Details \n");
txtTextArea.append("Account Holder's Name:::" + current.getAccountName() + "\n");
txtTextArea.append("Account Number::::::::::" + current.getAccountNumber()+ "\n");
txtTextArea.append("Account Sort Code:::::::" + current.getSortCode()+ "\n");
}
//DEPOSIT BUTTON CLICKED
}else if(source==depositButton){
boolean success = false;
while(success == false){
try{
strAmount = JOptionPane.showInputDialog(null,"Please Enter The Amount To Deposit");
amount = Float.parseFloat(strAmount);
success = true;
}catch(Exception am){
JOptionPane.showMessageDialog(null,"Invalid Numerals Added");
}
}
switch(strTemp.charAt(0)){
case 'c':
case 'C':
current.deposit(amount);
txtTextArea.append(Float.toString(amount) + " Deposited Into Current Account \n");
break;
case 'j':
case 'J':
joint.deposit(amount);
txtTextArea.append(Float.toString(amount) + " Deposited Into Joint Account \n");
break;
}
//WITHDRAW BUTTON CLICKED
}else if(source==withDrawButton){
boolean success = false;
while(success == false){
try{
strAmount = JOptionPane.showInputDialog(null,"Please Enter The Amount To WithDraw");
amount = Float.parseFloat(strAmount);
success = true;
}catch(Exception amo){
JOptionPane.showMessageDialog(null,"Invalid Numerals Added");
}
}
switch(strTemp.charAt(0)){
case 'c':
case 'C':
String strTemp2 = current.withDraw(amount);
txtTextArea.append(strTemp2 + "\n");
break;
case 'j':
case 'J':
String strTemp3 = joint.withDraw(amount);
txtTextArea.append(strTemp3 + "\n");
break;
}
//BALANCE BUTTON CLICKED
}else if(source==balanceButton){
switch(strTemp.charAt(0)){
case 'c':
case 'C':
txtTextArea.append(Float.toString(current.askBalance()) + "\n");
break;
case 'j':
case 'J':
txtTextArea.append(Float.toString(joint.askBalance()) + "\n");
break;
}
//MINI STATEMENT BUTTON CLICKED
}else if(source==miniStaButton){
switch(strTemp.charAt(0)){
case 'c':
case 'C':
txtTextArea.append(current.askMiniStatement() + "\n");
break;
case 'j':
case 'J':
txtTextArea.append(joint.askMiniStatement() + "\n");
break;
}
//CLOSE BUTTON CLICKED
}else if(source==closeButton){
openButton.setEnabled(true);
switch(strTemp.charAt(0)){
case 'c':
case 'C':
current.closeAnAccount();
setVariables();
System.exit(0);
break;
case 'j':
case 'J':
//SET ALL VARIABLES TO POINT AT NOTHING
joint.closeAnAccount();
setVariables();
//EXIT THE SYSTEM
System.exit(0);
break;
}
txtTextArea.setText("\t Geniusdip's Banks \n\n");
}

}

//MAIN METHOD
public static void main(String[] args){
Banks fram=new Banks();
fram.setBounds(0,0,900,500);
fram.show();
}



}


//CLASS ACCOUNT TO HANDLE CURRENT ACCOUNT
class Account{
private String accountName="", accountNumber="", sortCode="";
private Transaction trans = new Transaction();
private float amountDeposited=0, amountWithDrawn=0, currentBalance=0;
private int x=0;

//PUBLIC PROPERTY TO GET ACCOUNT NAME
public String getAccountName()
{
return accountName;
}

//PUBLIC PROPERTY TO GET ACCOUNT NUMBER
public String getAccountNumber()
{
return accountNumber;
}

//PUBLIC PROPERTY TO GET SORT CODE
public String getSortCode()
{
return sortCode;
}

//PUBLIC PROPERTY TO SET ACCOUNT NAME
public void setAccountName(String accountName)
{
this.accountName = accountName;
}

//PUBLIC PROPERTY TO SET ACCOUNT NUMBER
public void setAccountNumber(String accountNumber)
{
this.accountNumber = accountNumber;
}

//PUBLIC PROPERTY TO SET SORTCODE
public void setSortCode(String sortCode)
{
this.sortCode = sortCode;
}

//FUNCTION TO OPEN AN ACCOUNT
public void openAnAccount(String accountName, String accountNumber, String sortCode)
{
this.setAccountName(accountName);
this.setAccountNumber(accountNumber);
this.setSortCode(sortCode);
}

//FUNCTION TO DEPOSIT
public void deposit(float amountDeposited){
trans.depositInToAccount(amountDeposited,x);
x++;
}

//OVERLOADED FUNCTION TO WITHDRAW WITH ONE ARGUMENT
public String withDraw(float amountWithDrawn){
String strWD="";
if(trans.queryCurrentBalance()>=amountWithDrawn){
trans.withDrawFromAnAccount(amountWithDrawn,x);
x++;
strWD=Float.toString(amountWithDrawn) + " Amount Withdrawn";
}else{
strWD="Insufficient Funds In Account";
}
return strWD;
}

//OVERLOADED FUNCTION TO WITHDRAW WITH 2 ARGUMENTS
public String withDraw(float amountWithDrawn, float overDrawnAmount){
trans.withDrawFromAnAccount(amountWithDrawn,x);
x++;
return Float.toString(overDrawnAmount);
}

//FUNCTION TO RETURN CURRENT BALANCE
public float askBalance(){
float balance = trans.queryCurrentBalance();
return balance;
}

//FUNCTION TO RETURN MINI STATEMENT
public String askMiniStatement(){
String strStatement = trans.showMiniStatement();
return strStatement;
}

//FUNCTION TO CLOSE AN ACCOUNT
public void closeAnAccount()
{
setAccountName(null);
setAccountNumber(null);
setSortCode(null);
trans = null;
}

//FUNCTION THAT RETURNS THE NEXT TRANSACTION NUMBER
public int getX(){
x++;
return x;
}
}



//CLASS TRANSACTIONS FOR ALL THE BANKING TRANSACTIONS
//INCLUDING ASK BALANCE, DEPOSIT, WITHDRAW & MINI STATEMENT
class Transaction{


private float amountDeposited=0, amountWithDrawn=0, currentBalance=0;
private float[] transactionAmount = new float[10];
private int[] transactionNumber = new int[10];
private String[] transactionType = new String[10];

public void depositInToAccount(float amountDeposited, int transactionNumber) throws IndexOutOfBoundsException
{
try{
if(amountDeposited>0)
{
this.amountDeposited = amountDeposited;
this.currentBalance = this.currentBalance + amountDeposited;
if(transactionNumber > 9){
for(int i=0;i<9;++i){> 9
//ALL THE ELEMENTS SHOULD GO ONE STEP BACK WARDS
//THE FIRST ELEMENT IS DELETED
this.transactionNumber[i] = this.transactionNumber[i+1];
this.transactionType[i] = this.transactionType[i+1];
this.transactionAmount[i] = this.transactionAmount[i+1];
}
//THE NEW ELEMENT IS ADDED AT THE END
this.transactionNumber[9] = transactionNumber;
this.transactionType[9] = "Deposited";
this.transactionAmount[9] = amountDeposited;
}else{
//ELSE JUST ADD IT AT THE INDEX SPECIFIED
this.transactionNumber[transactionNumber] = transactionNumber;
this.transactionType[transactionNumber] = "Deposited";
this.transactionAmount[transactionNumber] = amountDeposited;
}
}
}catch(IndexOutOfBoundsException a){

}
}

//WITHDRAW FROM ACCOUNT FUNCTION
public String withDrawFromAnAccount(float amountWithDrawn,int transactionNumber)
{
String strWithDraw="";
currentBalance = currentBalance - amountWithDrawn;
if(transactionNumber > 9){
//REINITIALIZE THE ARRAY IF THE TRANSACTION NUMBER IS > 9
//ALL THE ELEMENTS SHOULD GO ONE STEP BACK WARDS
//THE FIRST ELEMENT IS DELETED
for(int i=0;i<9;i++){ str="Transaction Number \t Transaction Type \t Transaction Amount \n" i =" 0;i<="9;++i){" str =" str" accountname2="" accountname3="" accountname2 =" accountName2;" accountname3 =" accountName2;" strwd="" test =" askBalance()-amountWithDrawn;">=0){
strWD=super.withDraw(amountWithDrawn);
}else if(test>=-5000 & test<0){
super.withDraw(amountWithDrawn,test);
strWD="Amount Withdrawn Utilized Over Draft Facility";
}else{
strWD="Insufficient Funds In Account Even With Over Draft Facility";
}
return strWD;
}

//FUNCTION TO CLOSE THE ACCOUNT
public void closeAnAccount(){
setAccountName2("");
setAccountName3("");
super.closeAnAccount();
}
}
END