SocSecException\" For the \"SocSecProcessor\"class, the \"isValid\" method will
ID: 3529832 • Letter: S
Question
SocSecException"
For the "SocSecProcessor"class, the "isValid" method will need to use various string/wrapper class methods like:
- length()
- charAt(#)
- Character.isDigit(char)
Check for valid SSN format: ###-##-####
This program will ask the user for a persons name and social security number. The
program will then check to see if the social security number is valid. An exception will
be thrown if an invalid SSN is entered.
You will be creating your own exception class in this program. You will also create a
driver program that will use the exception class. Within the driver program, you will
include a static method that throws the exception.
=================================================================================================
1. Create an exception class called SocSecException. The UML for this class is
below. The constructor will call the superclass constructor. It will set the message associated
with the exception to Invalid social security number concatenated with the error
string.
+SocSecException(String error)
2. Create a driver program called SocSecProcessor.java. This program will have a
main method and a static method called isValid that will check if the social
security number is valid.
+main(args:String[ ]):void
+isValid(ssn:String):boolean
1. In the main method:
a) The main method should read a name and social security number from the
user as Strings.
b) The main method should contain a try-catch statement. This statement tries
to check if the social security number is valid by using the method isValid.
If the social security number is valid, it prints the name and social security
number. If a SocSecException is thrown, it should catch it and print out the
name, social security number entered, and an associated error message indicating
why the social security number is invalid.
c) A loop should be used to allow the user to continue until the user indicates
that they do not want to continue.
2. The static isValid method:
a) This method throws a SocSecException.
b) True is returned if the social security number is valid, false otherwise.
c) The method checks for the following errors and throws a SocSecException
with the appropriate message.
i) Number of characters not equal to 11. (Just check the length of the
string)
ii) Dashes in the wrong spots.
iii) Any non-digits in the SSN.
iv) Hint: Use a loop to step through each character of the string, checking
for a digit or hyphen in the appropriate spots.
3. Compile, debug, and run your program. Sample output is shown below with
user input in bold.
Name? Sam Sly
SSN? 333-00-999
Invalid the social security number, wrong number of
characters
Continue? y
Name? George Washington
SSN? 123-45-6789
George Washington 123-45-6789 is valid
Continue? y
Name? Dudley Doright
SSN? 222-00-999o
Invalid the social security number, contains a
character that is not a digit
Continue? y
Name? Jane Doe
SSN? 333-333-333
Invalid the social security number, dashes at wrong
positions
Continue? n
Explanation / Answer
import java.util.Scanner;
public class SocSecProcessor {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner inputScanner = new Scanner(System.in);
String name;
String SSN;
String response;
do {
System.out.println("Enter a name: ");
name = inputScanner.nextLine();
System.out.println("Enter a SSN: ");
SSN = inputScanner.nextLine();
try {
if (isValid(SSN)) {
System.out.println("The name of the person: " + name);
System.out.println("The SSN is: " + SSN);
}
} catch (SocSecException sse) {
System.out.println("The name of the person: " + name);
System.out.println("The SSN is: " + SSN);
System.out.println(sse.getMessage());
}
System.out.println("Do you want to Continue? (y/n): ");
response = inputScanner.nextLine();
} while (response.equals("y"));
}
public static boolean isValid(String SSN) throws SocSecException {
if (SSN.length() != 11)
throw new SocSecException(
"Invalid the social security number, wrong number of characters ");
if (SSN.charAt(3) != '-' && SSN.charAt(6) != '-')
throw new SocSecException(
"Invalid the social security number, dashes at wrong");
for (int i = 0; i < SSN.length(); i++) {
if (i != 3 && i != 6 && !Character.isDigit(SSN.charAt(i))) {
throw new SocSecException(
"Invalid the social security number, contains a character that is not a digit ");
}
}
return true;
}
}
Output:
sss
Enter a SSN:
333-99
The name of the person: sss
The SSN is: 333-99
Invalid the social security number, wrong number of characters
Do you want to Continue? (y/n):
y
Enter a name:
AAA
Enter a SSN:
333-00-9999
The name of the person: AAA
The SSN is: 333-00-9999
Do you want to Continue? (y/n): n
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