Need help..anyone GUI Interfaces

Question

http://forum.java.sun.com/thread.jsp?forum=31&thread=472147&tstart=0&trange=15
Can someone please help me with this program..I'm new to java and I don't understand GUI's. I read everything inside and out in my text book and still don't get how to convert my program into a gui interface...please help.

Answer 1

Sorry i accidently posted twice...
But here is my topic incase the link did not work. Thanks! Really desperate!
Develop a Java application that will determine if a department store customer has exceeded the credit limit on a charge account. For each customer, the following facts are available:
a) Account Balance
b) Balance at the beginning of the month
c) Total of all items charged by this customer this month
d) Total of all credits applied to the customer’s account this month
e) Allowed credit limit
This program should input each of these facts from input dialogs as integers, calculate the new balance, display the new balance and determine if the new balance exceeds the customer’s credit limit. For those customers whose credit limit is exceeded, the program should display the message, “Credit limit exceeded.”
Here is the program I wrote : (for the above criteria)
// Credit.java
// Program monitors accounts
import java.awt.*;
import javax.swing.JOptionPane;
public class Credit {
public static void main( String args[] )
String inputString;
int account, newBalance,
oldBalance, credits, creditLimit, charges;
inputString =
JOptionPane.showInputDialog( "Enter Account (-1 to quit):" );
while ( ( account = Integer.parseInt( inputString ) ) != -1 ) {
inputString =
JOptionPane.showInputDialog( "Enter Balance: " );
oldBalance = Integer.parseInt( inputString );
inputString =
JOptionPane.showInputDialog( "Enter Charges: " );
charges = Integer.parseInt( inputString );
inputString =
JOptionPane.showInputDialog( "Enter Credits: " );
credits = Integer.parseInt( inputString );
inputString =
JOptionPane.showInputDialog( "Enter Credit Limit: " );
creditLimit = Integer.parseInt( inputString );
newBalance = oldBalance + charges - credits;
String resultsString, creditStatusString;
resultsString = "New balance is " + newBalance;
if ( newBalance > creditLimit )
creditStatusString = "CREDIT LIMIT EXCEEDED";
else
creditStatusString = "Credit Report";
JOptionPane.showMessageDialog(
null, resultsString,
creditStatusString,
JOptionPane.INFORMATION_MESSAGE );
inputString =
JOptionPane.showInputDialog( "Enter Account (-1 to quit):" );
System.exit( 0 );
AND I NEED TO MODIFY IT TO DO THE FOLLWOING: (I'M A NEWB AND IT'S TAKEN ME FOREVER JUST TO DO THE ABOVE..PLEASE ANY HELP WOULD BE GREAT!!
Expand the above program.
1) Design an appropriate GUI for input. You cannot use dialog boxes. Design functional window(s) from scratch. State your conditions in the boxed comment at the top of the class. Input will need a transaction date also for the CustomerHistory class.
2) Add a customer # ( a unique identifier)
3) Besides your GUI, you will want 2 other classes: Customer and CustomerHistory. CustomerHistory will serve as a mock database.
4) CustomerHistory will hold the previous balance & allowed credit limit plus any credit violation history. Your CustomerHistory violations must be an array, so that it could be readily expandable.
5) Some step-up is necessary – chose your own approach and document.
6) Then run your system enough times to show the response when a customer exceeds THREE ‘over credit’ limits. CustomerHistory violations should be printed out, as well as, our choice of a ‘dunning notice’. It cannot be the same as a simple one time exceeds limit. Also show a normal customer run. Prove to me your solution works!
7) Draw the UML diagram of your interconnecting classes.