Question

In this programming assignment we will review string and character manipulations. You will be developing a Java program that will prompt users for person’s last name, year of birth, and employee number in a predefined specific format. You will then parse the input string and print it in separate lines along with validations.

The input format will be of the form :,< employee number >

You will need to separate three segments in order to print it as:

Last name

Year of birth

Employee number

Your program will report if these values are Valid, or if they are Invalid.

Functional requirements:

1. A last name is valid if it contains only letters and spaces, it begins and ends with a letter, and it does not contain 2 consecutive spaces.

2. Valid birth years are integers between 1900 and 1999, inclusive, but your program must print Invalid on non-numeric input. Implicitly, this means you must read the data as a string.

3. Valid employee number will have the format LDDD-DD-DDDD, where L is a capital letter and each D is a digit. For example, A991-16-4602.

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You will need to use at least the indexOf  and substring methods.

Sample Run

Please enter an string as the form of :,< employee number >

Barford:1975,A123-45-6728

last name: Barford

Last Name is Valid

year of birth: 1975

Year of Birth is Valid

license number: A123-45-6728

Employee Number is Valid

Please enter a string as the form of :,< employee number >

Dyer Doan:2001,C123-11-7840

last name: Dyer Doan

Last Name is Valid

year of birth: 2001

Year of Birth is Invalid

employee number: C123-1178-40

Employee Number is Valid

Please enter an string as the form of :,< employee number >

Dy er:98,1135-4498-40

last name: Dy er

Last Name is Invalid

year of birth: 98

Year of Birth is Invalid

employee number: 1135-4498-40

Employee Number is Invalid

Answer 1

Thanks for the question.

Below is the code you will be needing  Let me know if you have any doubts or if you need anything to change.

Thank You !!

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import java.util.Scanner;

public class Validator {

    private static Scanner scanner = new Scanner(System.in);

    public static void main(String[] args) {

        System.out.print("Please enter an string as the form of :,< employee number >");
       String input = scanner.nextLine();

        String tokens[] = input.split(":");
        String lastName = tokens[0];
        tokens = tokens[1].split(",");
        String yearOfBirth = tokens[0];
        String employeeNumber = tokens[1];

        validateLastName(lastName);
        validateYear(yearOfBirth);
        validateEmployeeNumber(employeeNumber);

    }

    public static void validateLastName(String name) {
        //1. A last name is valid if it contains only letters and spaces,
        // it begins and ends with a letter, and it does not contain 2 consecutive spaces.
        System.out.println("Last Name: " + name);
        for (int i = 0; i < name.length(); i++) {
            char letter = name.charAt(i);
            if (('a' <= letter && letter <= 'z') || ('A' <= letter && letter <= 'Z') || letter == ' ') {

                // valid there are two consecutive spaces below logic validates these conditions
                if (letter == ' ') {
                    if (i == 0) {
                        if (name.charAt(1) == ' ') {
                            System.out.println("Last Name in Invalid");
                            return;
                        }
                    } else if (i == name.length() - 1) {
                        if (name.charAt(i - 1) == ' ') {
                            System.out.println("Last Name in Invalid");
                            return;
                        }
                    }else{
                        if(name.charAt(i-1)==' ' || name.charAt(i+1)==' '){
                            System.out.println("Last Name in Invalid");
                            return;
                        }
                    }
                }
            } else {
                System.out.println("Last Name in Invalid");
                return;
            }
        }

        System.out.println("Last Name is Valid");
    }

    public static void validateYear(String year){

        //2. Valid birth years are integers between 1900 and 1999,
        // inclusive, but your program must print Invalid on non-numeric input.
        // Implicitly, this means you must read the data as a string.
        System.out.println("Year of Birth: "+year);
        try {
            int yearInt = Integer.parseInt(year);
            if(1900<=yearInt && yearInt<=1999){
                System.out.println("Year of Birth is Valid");
            }else{
                System.out.println("Year of Birth is Invalid");
            }

        }catch (NumberFormatException nfe){
            System.out.println("Year of Birth is Invalid");
            return;
        }
    }

    public static void validateEmployeeNumber(String num){

        //3. Valid employee number will have the format LDDD-DD-DDDD,
        // where L is a capital letter and each D is a digit. For example, A991-16-4602.
        System.out.println("License Number: "+num);
        if(num.length()!=12){
            System.out.println("Employee Number is Invalid");
            return;
        }
        if(!('A'<=num.charAt(0) && num.charAt(0)<='Z')){
            System.out.println("Employee Number is Invalid");
            return;
        }

        int firstHypen = num.indexOf('-');
        if(firstHypen==-1){
            System.out.println("Employee Number is Invalid");
            return;
        }
        if(!validateItsNumber(num.substring(1,firstHypen))){
            System.out.println("Employee Number is Invalid");
            return;
        }
        String subString = num.substring(firstHypen+1);
        int secondHypen = subString.indexOf('-');
        if(secondHypen==-1){
            System.out.println("Employee Number is Invalid");
            return;
        }
        if(!validateItsNumber(num.substring(firstHypen+1,firstHypen+1+secondHypen))){
            System.out.println(num.substring(firstHypen,firstHypen+2+secondHypen));
            System.out.println("Employee Number is Invalid");
            return;
        }
        if(!validateItsNumber(subString.substring(secondHypen))){
            System.out.println(subString);
            System.out.println("Employee Number is Invalid");
            return;
        }
        if(!validateItsNumber(subString.substring(secondHypen))){
            System.out.println("Employee Number is Invalid");
            return;
        }

        if (firstHypen!=4 || secondHypen!=2){
            System.out.println("Employee Number is Invalid");
            return;
        }
        System.out.println("Employee Number is Valid");

    }

    public static boolean validateItsNumber(String num){

        try {
            int n= Integer.parseInt(num);
            return true;
        }catch (NumberFormatException e){
            return false;
        }
    }
}

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