CSC-111 Two SSN Verifier Solutions

SSNVerifier.java

/*
 * Prof. Antonio C Silvestri
 * 10/18/2016
 * CSC-111 D01
 * Social Security # Verifier
 * silvestri@stcc.edu
*/

import java.util.Scanner;

public class SSNVerifier {

	public static void main(String[] args) {

		Scanner input = new Scanner(System.in);

		System.out.print("Please enter an SSN to test for validity: ");
		String socialSecNum = input.nextLine();
		socialSecNum = socialSecNum.trim();

		if (socialSecNum.length() == 9) {
			boolean isValid = true;
			isValid = isValid && Character.isDigit(socialSecNum.charAt(0));
			isValid = isValid && Character.isDigit(socialSecNum.charAt(1));
			isValid = isValid && Character.isDigit(socialSecNum.charAt(2));
			isValid = isValid && Character.isDigit(socialSecNum.charAt(3));
			isValid = isValid && Character.isDigit(socialSecNum.charAt(4));
			isValid = isValid && Character.isDigit(socialSecNum.charAt(5));
			isValid = isValid && Character.isDigit(socialSecNum.charAt(6));
			isValid = isValid && Character.isDigit(socialSecNum.charAt(7));
			isValid = isValid && Character.isDigit(socialSecNum.charAt(8));

			System.out.println(socialSecNum + " is " + ((isValid) ? "a valid" : "an invalid") + " SSN.");
		}
		else if (socialSecNum.length() == 11) {
			boolean isValid = true;
			isValid = isValid && Character.isDigit(socialSecNum.charAt(0));
			isValid = isValid && Character.isDigit(socialSecNum.charAt(1));
			isValid = isValid && Character.isDigit(socialSecNum.charAt(2));
			isValid = isValid && socialSecNum.charAt(3) == '-';
			isValid = isValid && Character.isDigit(socialSecNum.charAt(4));
			isValid = isValid && Character.isDigit(socialSecNum.charAt(5));
			isValid = isValid && socialSecNum.charAt(6) == '-';
			isValid = isValid && Character.isDigit(socialSecNum.charAt(7));
			isValid = isValid && Character.isDigit(socialSecNum.charAt(8));
			isValid = isValid && Character.isDigit(socialSecNum.charAt(9));
			isValid = isValid && Character.isDigit(socialSecNum.charAt(10));

			System.out.println(socialSecNum + " is " + ((isValid) ? "a valid" : "an invalid") + " SSN.");
		}
		else
			System.out.println(socialSecNum + " is an invalid SSN.");

		input.close();
	}

}

SSNVerifier2.java

/*
 * Prof. Antonio C Silvestri
 * 10/18/2016
 * CSC-111 D01
 * Social Security # Verifier
 * silvestri@stcc.edu
*/

import java.util.Scanner;

public class SSNVerifier2 {

	public static void main(String[] args) {

		Scanner input = new Scanner(System.in);

		System.out.print("Please enter an SSN to test for validity: ");
		String socialSecNum = input.nextLine();
		socialSecNum = socialSecNum.trim();

		if (socialSecNum.length() == 9) {
			boolean isValid = true;
			for (int i = 0; isValid && i < socialSecNum.length(); i++)
				isValid = isValid && Character.isDigit(socialSecNum.charAt(i));
			System.out.println(socialSecNum + " is " + ((isValid) ? "a valid" : "an invalid") + " SSN.");
		} else if (socialSecNum.length() == 11) {
			boolean isValid = true;
			for (int i = 0; isValid && i < socialSecNum.length(); i++)
				if (i == 3 || i == 6)
					isValid = isValid && socialSecNum.charAt(i) == '-';
				else
					isValid = isValid && Character.isDigit(socialSecNum.charAt(i));
			System.out.println(socialSecNum + " is " + ((isValid) ? "a valid" : "an invalid") + " SSN.");
		} else
			System.out.println(socialSecNum + " is an invalid SSN.");

		input.close();
	}

}