Any free JAVA coding?

Hi,
Where i can download some free JAVA code/application?
i need to find some credit card validation machanism written in JAVA ..can anyone help me?

I'm working on it! :)

this is want you want in VB
(thanks to Aaron Young)
see thread: http://forums.vb-world.net/showthread.php?threadid=3034

I'm trying to convert it to java for you but I'm having trouble getting my head around the if iif()then line

Code:

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Option Explicit

Private Function CheckCreditCard(ByVal sNumber As String) As Boolean
    Dim iCount As Integer
    Dim iDigit As Integer
    Dim iTotal As Integer
   
    For iCount = 1 To Len(sNumber)
        iDigit = Val(Mid$(sNumber, iCount, 1))
        If IIf(Len(sNumber) Mod 2, iCount Mod 2 = 0, iCount Mod 2) Then
 
            iDigit = iDigit * 2
            If iDigit > 9 Then iDigit = iDigit - 9
        End If
        iTotal = iTotal + iDigit
    Next
    If iTotal Mod 10 = 0 And Len(sNumber) > 0 Then CheckCreditCard = True
   
End Function
Private Sub Command1_Click()
    If CheckCreditCard(Text1) Then
        MsgBox "Credit Card Verified"
    Else
        MsgBox "Credit Card Invalid"
    End If
End Sub

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Got it!
(NOTE: this is for use on the command line rather than an applet)

For some unknown reason my compliler objected to my using Integer.parseInt to convert from a numerical char to an integer so I used a byte array instead.

Code:

---


import java.io.*;
public class cardchecker{
       
public static void main(String[] args) throws IOException {       
                byte[] sNumber = args[0].getBytes();       
                int iCount = 0;
                int iDigit = 0;
                int iTotal = 0;
       
    for(iCount = 0; iCount < sNumber.length;iCount++)
        {       
               
                iDigit = sNumber[iCount] - 48;
                //System.out.println(iDigit);
                boolean b = false;               
               
                if ((sNumber.length % 2 )== 1)
                {
                        b =(((iCount+1) %2) == 0);//icount runs from 0 NOT 1
                }else{
                        b = (((iCount+1) %2) == 1);
                }
               
                //System.out.println("b is : " + b );
                if(b==true)
                {
                        iDigit *= 2;
               
                        if(iDigit > 9)
                        {
                                iDigit -= 9;
                        }
                }
        iTotal += iDigit;
       
        };
        // System.out.println("iTotal: " + iTotal%10);
        if((iTotal % 10 == 0) && (sNumber.length > 0))
        {
                System.out.println("Credit Card Verified");
        }else{
                System.out.println("Credit Card Invalid");
        }
       
       
        }
        }

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