Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

public class Main {
    private static boolean validCCNumber(String n) {
        try {
            /*
             ** known as the LUHN Formula (mod10)
             */
            int j = n.length();

            String[] s1 = new String[j];
            for (int i = 0; i < n.length(); i++) {
                s1[i] = "" + n.charAt(i);
            }

            int checksum = 0;

            for (int i = s1.length - 1; i >= 0; i -= 2) {
                int k = 0;

                if (i > 0) {
                    k = Integer.valueOf(s1[i - 1]).intValue() * 2;
                    if (k > 9) {
                        String s = "" + k;
                        k = Integer.valueOf(s.substring(0, 1)).intValue()
                                + Integer.valueOf(s.substring(1)).intValue();
                    }
                    checksum += Integer.valueOf(s1[i]).intValue() + k;
                } else {
                    checksum += Integer.valueOf(s1[0]).intValue();
                }
            }
            return ((checksum % 10) == 0);
        } catch (Exception e) {
            return false;
        }
    }
}