Help with Array
This is a multi-part message in MIME format.
------=_NextPart_000_000A_01C9C452.A4B186F0
Content-Type: text/plain;
format=flowed;
charset="iso-8859-1";
reply-type=original
Content-Transfer-Encoding: 7bit
Hi everyone,
I am trying to write a program for my assignment, it is a banking program.
I have created an array of accounts, I hard coded the first two accounts
while writing to test program and until i could figure out how to create the
accounts in the program. I figured that out now i am trying to figure out
how to delete (or set to null) one of the accounts. I ask the user what
acount they want to delete and i take that input and run
public void deleteAccount( int userAcct)
{
int usAC = userAcct;
for ( int i = 0; i<accounts.length; i++ )
{
if(accounts[i]!=null)
{
if(usAC== accounts[i].getAccountNumber())
{
//accounts[i]=null;
System.out.println("account found " + accounts[i].getAccountNumber());
accounts[i]=null;
break;
}
else
{
System.out.println("account not found ");
}
}
else
{
System.out.println("did not find ");
}
}
}
this works in that it does find the account and sets it to null but it also
deletes all the accounts after the one it finds? All the accounts before
the one it finds is still there but the rest are gone.
Can someone tell me what I am doing wrong?
I attached the one java file that has this code in it in case this snippet
is not enough to go by.
Thanks,
Jeff.
------=_NextPart_000_000A_01C9C452.A4B186F0
Content-Type: application/octet-stream;
name="BankDatabase.java"
Content-Transfer-Encoding: quoted-printable
Content-Disposition: attachment;
filename="BankDatabase.java"
// BankDatabase.java=0A=
// Represents the bank account information database=0A=
=0A=
public class BankDatabase=0A=
{=0A=
private Account accounts[]; // array of Accounts=0A=
private Screen screen;=0A=
=0A=
private static double interestRate = 0;=0A=
private static double monthlyFee = 0;=0A=
=0A=
// no-argument BankDatabase constructor initializes accounts=0A=
public BankDatabase()=0A=
{=0A=
accounts = new Account[ 10 ]; // just 2 accounts for testing=0A=
accounts[ 0 ] = new Account( "Jeff", "Bailey", 12345, 1200.0 );=0A=
accounts[ 1 ] = new Account( "John", "Doe", 56789, 200.0 );=0A=
} // end no-argument BankDatabase constructor=0A=
=0A=
// retrieve Account object containing specified account number=0A=
private Account getAccount( int accountNumber )=0A=
{=0A=
// loop through accounts searching for matching account number=0A=
for ( Account currentAccount : accounts )=0A=
{=0A=
// return current account if match found=0A=
if ( currentAccount.getAccountNumber() == accountNumber )=0A=
return currentAccount;=0A=
//screen.displayMessageLine("Account Found");=0A=
} // end for=0A=
=0A=
screen.displayMessageLine("No Account Found");=0A=
return null; // if no matching account was found, return null=0A=
} // end method getAccount=0A=
=0A=
// determine whether user-specified account number and PIN match=0A=
// those of an account in the database=0A=
public boolean authenticateAccount( String userFname, String =
userLname, int userAccountNumber)=0A=
{=0A=
// attempt to retrieve the account with the account number=0A=
Account userAccount = getAccount( userAccountNumber );=0A=
=0A=
// if account exists, return result of Account method validatePIN=0A=
if ( userAccount != null )=0A=
return userAccount.validateName( userFname, userLname );=0A=
else=0A=
return false; // account number not found, so return false=0A=
} // end method authenticateUser=0A=
=0A=
=0A=
// return total balance of Account with specified account number=0A=
public double getBalance( int userAccountNumber )=0A=
{=0A=
return getAccount( userAccountNumber ).getBalance();=0A=
} // end method getBalance=0A=
=0A=
// credit an amount to Account with specified account number=0A=
public void credit( int userAccountNumber, double amount )=0A=
{=0A=
getAccount( userAccountNumber ).credit( amount );=0A=
} // end method credit=0A=
=0A=
// debit an amount from of Account with specified account number=0A=
public void debit( int userAccountNumber, double amount )=0A=
{=0A=
getAccount( userAccountNumber ).debit( amount );=0A=
} // end method debit=0A=
public void compoundMonthly( int userAccountNumber, double =
amount,double intRate, double mFee )=0A=
{=0A=
getAccount( userAccountNumber ).compoundMonthly( amount, intRate, =
mFee );=0A=
} // end method debit=0A=
public String getFname( int userAccountNumber )=0A=
{=0A=
return getAccount( userAccountNumber ).getfirstName();=0A=
} // end method getFname=0A=
public String getLname( int userAccountNumber )=0A=
{=0A=
return getAccount( userAccountNumber ).getlastName();=0A=
} // end method getFname=0A=
=0A=
=0A=
=0A=
public void setinterestRate(double sir)=0A=
{=0A=
interestRate = sir;=0A=
}=0A=
public double getinterestRate()=0A=
{=0A=
return interestRate;=0A=
}=0A=
public void setmonthlyFee(double mF)=0A=
{=0A=
monthlyFee = mF;=0A=
}=0A=
public double getmonthlyFee()=0A=
{=0A=
return monthlyFee;=0A=
}=0A=
=0A=
public void displayAccountList()=0A=
{=0A=
for ( Account currentAccount : accounts )=0A=
{=0A=
if(currentAccount != null)=0A=
{=0A=
System.out.println("Customer Name: " + currentAccount.getfirstName() =
+ " " + currentAccount.getlastName() );=0A=
System.out.println("Account Number: " + =
currentAccount.getAccountNumber());=0A=
System.out.println("Account Balance: " + =
currentAccount.getBalance());=0A=
System.out.println(" ");=0A=
}=0A=
else=0A=
{=0A=
System.out.println("The End ");=0A=
break;=0A=
}=0A=
=0A=
}=0A=
}=0A=
=0A=
=0A=
public void compoundAllAccounts()=0A=
{=0A=
for ( Account currentAccount : accounts )=0A=
{=0A=
if(currentAccount != null)=0A=
{=0A=
=0A=
double amount = currentAccount.getBalance();=0A=
double intRate = getinterestRate();=0A=
double mFee = getmonthlyFee();=0A=
currentAccount.compoundMonthly( amount, intRate, mFee );=0A=
}=0A=
else=0A=
{=0A=
System.out.println("The End ");=0A=
break;=0A=
}=0A=
=0A=
=0A=
}=0A=
=0A=
=0A=
}=0A=
=0A=
public void createAccount(String userFname, String userLname, =
double beginAmount)=0A=
{=0A=
String usFN = userFname;=0A=
String usLN = userLname;=0A=
double bgAM = beginAmount;=0A=
=0A=
for ( int i = 0; i<accounts.length; i++ )=0A=
{=0A=
if(accounts[i]==null)=0A=
{=0A=
int generateNumber = 2 + 2 * i;=0A=
accounts[i]= new Account(usFN, usLN, generateNumber, bgAM);=0A=
System.out.println("account created ");=0A=
break;=0A=
}=0A=
else=0A=
{=0A=
System.out.println("did not work ");=0A=
}=0A=
=0A=
}=0A=
=0A=
=0A=
}=0A=
=0A=
public void deleteAccount( int userAcct)=0A=
{=0A=
int usAC = userAcct;=0A=
=0A=
for ( int i = 0; i<accounts.length; i++ )=0A=
{=0A=
if(accounts[i]!=null)=0A=
{=0A=
=0A=
if(usAC== accounts[i].getAccountNumber())=0A=
{=0A=
//accounts[i]=null;=0A=
System.out.println("account found " + =
accounts[i].getAccountNumber());=0A=
accounts[i]=null;=0A=
break;=0A=
}=0A=
else=0A=
{=0A=
System.out.println("account not found ");=0A=
}=0A=
}=0A=
else=0A=
{=0A=
System.out.println("did not find ");=0A=
}=0A=
=0A=
}=0A=
=0A=
}=0A=
=0A=
=0A=
} // end class BankDatabase=0A=
=0A=
------=_NextPart_000_000A_01C9C452.A4B186F0--