Again Maintaining Bank Accounts in java

Question

HI every body!
Can anybody help in the following assignment., which I am assigned & is attached below.
What should be the driver programme like to achieve the required result?
Please check the attached code & tell me what is wrong with it & where is wrong?.
I am stuck as the loop I have used for Open menu command is executing continuesly( Remember I have not written the code for menu options which according to me is supposed to be before the call to the method which will open the account.
What I am supposed to do, to achieve what is required by the assignment?.
Especially Driver Programme(TestAccount.java) & about write, Select, CreditInterest menu option as required by the assignment.
Is the coding I have written uptill now is ok.
I have done bit of coding & displaying this here . Could any one check what is wrong with it ? & guide me in the right path to achieve the required result.
And what I am supposed to put this code in applet.
Please do help as soon as possible
I will be very very thankful
**Following is the assignment
Write a program that maintains two types of bank accounts - checking and savings. The program will store all of the account objects in a single array. Use the class below as a guide for the superclass.
Public class BankAccount
private double balance;
private String AcctNumber;
public BankAccount(String Number, double initialBalance)
public void deposit(double amount)
public void withdrawal(double amount)
public String getNumber()
public double getBalance()
public void close()
Descriptions of the menu commands for the program are as follows:
Open account - the user is prompted for the account type, either c for checking or s for savings. If the user enters s, the program will ask for the annual interest rate. If the user enters anything other than an s or c, the program will display �Input was not c or s; please try again.� The user is then prompted to enter a new account number and initial balance. This data is stored in a new object. Objects for all existing accounts must be stored in an array. The new account becomes the current account.
Close account - If there is no current account, the message �Please select an account� is displayed. Otherwise, the current account is removed from the array. There is no current account after this operation is completed.
Deposit - If there is no current account, the message �Please select an account� is displayed. Otherwise, the user is prompted to enter the amount of the deposit. The amount entered by the user is added to the balance of the current account.
Withdraw - If there is no current account, the message �Please select an account� is displayed. Otherwise, the user is prompted to enter the amount of the withdrawal. The amount entered by the user is subtracted from the balance of the current account.
Select - The user is prompted to enter an account number. The array is then searched to see if any BankAccount object contains this number. If so, the object becomes the current account. If not, the following message is displayed :
Account number not found
Write - If there is no current account, the message �Please select an account� is displayed. If the account chosen is not a checking account, the program will display �Please select a checking account�. Otherwise, the user is prompted to enter the amount of the check. The amount entered by the user is subtracted from the balance of the current account and the number of checks written on the account is incremented.
Credit Interest - One month of interest is credited to each savings account based on the interest rate for that account. Checking accounts are not affected.
Other items of note:
The checking account class will store the number of checks written against the account. Its methods will include a getter for the number of checks written and a method that writes a check for given amount.
The savings account class will store the annual interest rate for the account. Its methods will include a getter and setter for the interest rate.
The list of commands is redisplayed after each command has been executed, along with the current account, its balance and for checking - number of checks written; for savings - interest rate see below:
Current account: 123455 Balance: $100.00 Number of Checks written: 6
Current account: 123455 Balance: $100.00 Interest Rate: 4.5%
Set the maximum array size to eight. When the maximum number of accounts is reached display an error message �We are sorry, we can�t accept any more accounts at this time�
All user input may be entered as upper or lower case letters.
***Following is the code for Super Class
public class BankAccount
private double balance;
private String acctNumber;
public BankAccount()
balance = 0.0;
acctNumber = "";
public BankAccount( double initialBalance, String number)
balance = initialBalance;
acctNumber = number;
public void deposit(double amount)
if (amount >= 0)
balance = balance + amount;
else
System.out.print("You cannot deposit " +
"a negative sum of money: ");
System.out.println(amount);
}//else
public void withdraw(double amount)
if (amount <= balance && amount >= 0)
balance = balance - amount;
else
System.out.print("You cannot withdraw " +
"that sum of money: ");
System.out.println(amount);
}//else
public String getAcctNumber()
return acctNumber;
public double getBalance()
return balance;
public void close()
balance = 0.0;
// toString method
public String toString()
return "Current account: " + acctNumber + " Balance: $" + balance;
}//BankAccount
** Below is the code for CheckingAccount Child Class
public class CheckingAccount extends BankAccount
private int numOfChecks;
public CheckingAccount(double initialBalance,String number, int numOfChecks) // construct superclass
super(initialBalance, number);
this.numOfChecks = numOfChecks;
public int getNumOfChecks()
return numOfChecks;
public void deposit(double amount)
super.deposit(amount);
public void withdraw(double amount)
super.withdraw(amount);
public String toString()
return super.toString() + " Number of Checks written " + numOfChecks;
** Code for SavingsAccount Child Class
public class SavingsAccount extends BankAccount
private double interestRate;
public SavingsAccount()
super();
interestRate = 0.0;
public SavingsAccount(double initialBalance, String number,double interestRate)
super(initialBalance, number);
this.interestRate = interestRate;
public double getInterestRate()
return interestRate;
public void setInterestRate(double rate)
this.interestRate = rate;
public String toString()
return super.toString() + " Interest Rate " + interestRate;
/*public void addInterest()
double interest = getBalance() * interestRate / 100;
deposit(interest);
**code for Driver Programme TestAccount.java
import java.io.*;
public class TestAccount
public static void main(String[] args) throws IOException
InputStreamReader is = new InputStreamReader(System.in);
BufferedReader stdin = new BufferedReader(is);
BankAccount[] accountArray = new BankAccount[7];
int x;
for(x = 0; x < accountArray.length ; ++x)
char selection;
System.out.print("Please select the type of ");
System.out.println("account you want to open:");
System.out.println(" c for checking account");
System.out.println(" s for savings account");
selection = (char)System.in.read();
System.in.read(); System.in.read();
if(selection == 'c')
for( x = 0; x<accountArray.length;++x)
createChecking(accountArray);
/*else if(selection == 's')
createSavings();
else
System.out.println(" Input was not c or s, please try again!");
}//for
}//main
public static void createChecking(BankAccount[] arr) throws IOException
InputStreamReader is = new InputStreamReader(System.in);
BufferedReader stdin = new BufferedReader(is);
int x;
for(x = 0; x < arr.length; ++x)
String inString ;
double initBalance = 0.0;
int numChecks = 0;
System.out.println("Please enter new account number:");
inString = stdin.readLine();
System.out.println("Please enter initial balance:");
inString = stdin.readLine();
initBalance = Double.parseDouble(inString);
numChecks = Integer.parseInt(inString);
arr[x] = new CheckingAccount(initBalance, inString, numChecks);
}//for
}//createChecking
/*public static void createSavings() throws IOException
InputStreamReader is = new InputStreamReader(System.in);
BufferedReader stdin = new BufferedReader(is);
int x;
for(x = 0; x < accountArray.length; ++x)
String aString ;
double intRate = 0.0;
System.out.println("Please enter annual interest rate:");
aString = stdin.readLine();
intRate = Double.parseDouble(aString);
accountArray[x] = new SavingsAccount(intRate);
}//for
}//createSavings*/
}//class

Answer 1

http://forum.java.sun.com/thread.jsp?forum=31&thread=243200