-
Notifications
You must be signed in to change notification settings - Fork 0
/
AmericanExpress.java
79 lines (54 loc) · 1.82 KB
/
AmericanExpress.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
package application;
public class AmericanExpress extends Creditcard{
private String creditcardnumber;
public AmericanExpress()
{ }
public AmericanExpress(String thecardnumber)
{
this.creditcardnumber = thecardnumber;
}
public Creditcard getCard(String creditcardnumber){
if( creditcardnumber.length() > 19 )
{
return null;
}
boolean check = true;
for(int i=0; i< creditcardnumber.length();i++){
if(!Character.isDigit(creditcardnumber.charAt(i))){
check = false;
break;
}
else
{
check = true;
}
}
if(!check)
{
return null;
}
//consider the requirements of the american express card
if(creditcardnumber.length() == 15 && check == true && creditcardnumber.charAt(0)=='3' &&
(creditcardnumber.charAt(1)=='4' || creditcardnumber.charAt(1)=='7')){
AmericanExpress am = new AmericanExpress(creditcardnumber);
return am;
}
else
{
//if alldigits is true but cardnumber is not any of the card types above
return null;
}
}
public String CardType()
{
return "AMERICAN EXPRESS";
}
public String getNumber()
{
return this.creditcardnumber;
}
public void setNumber(String thecardnumber)
{
this.creditcardnumber = thecardnumber;
}
}