Java Reference
In-Depth Information
30
case
DEBIT_BALANCE
:
31
System.out.printf(
"%nAccounts with debit balances:%n"
);
32
break
;
33
}
34
35
readRecords(accountType);
36
accountType = getRequest();
// get user's request
37
}
38
}
39
40
// obtain request from user
41
private static
MenuOption getRequest()
42
{
43
int
request =
4
;
44
45
// display request options
46
System.out.printf(
"%nEnter request%n%s%n%s%n%s%n%s%n"
,
47
" 1 - List accounts with zero balances"
,
48
" 2 - List accounts with credit balances"
,
49
" 3 - List accounts with debit balances"
,
50
" 4 - Terminate program"
);
51
52
try
53
{
54
Scanner input = new Scanner(System.in);
55
56
do
// input user request
57
{
58
System.out.printf(
"%n? "
);
59
request = input.nextInt();
60
}
while
((request <
1
) || (request >
4
));
61
}
62
catch
(NoSuchElementException noSuchElementException)
63
{
64
System.err.println(
"Invalid input. Terminating."
);
65
}
66
67
return
choices[request -
1
];
// return enum value for option
68
}
69
70
// read records from file and display only records of appropriate type
71
private static void
readRecords(MenuOption accountType)
72
{
73
// open file and process contents
74
try
(Scanner input =
new
Scanner(Paths.get(
"clients.txt"
)))
75
{
76
while
(input.hasNext())
// more data to read
77
{
78
int
accountNumber = input.nextInt();
79
String firstName = input.next();
80
String lastName = input.next();
81
double
balance = input.nextDouble();
82
Fig. 15.8
|
Credit-inquiry program. (Part 2 of 4.)
