I am writing my code for this assignment but I keep having issues with my code. Can someone shows me how to implement all the functionality. Thanks.

I am posting my code at the end but it's not working properly and It's not completed yet.

work with Scanner, a text file and toString().

• Student.java
  • fields for first name, last name, id number, age, grade (a double) and pass (a Boolean)
  • default constructor
  • overloaded constructor for all fields except pass.
    1. Pass will be set based on the grade
       1. Grade of 60 or more will be set to true
       2. Grade under 60 will be set to false
    2. All parameters will be validated and throw IllegalArgumentException for an invalid value
  • Getters and setters will be provided for each field
    1. Setters will validate but will ignore bad parameters and make no change to the field
  • toString() will be implemented

• Lab8Driver.java
  • field HashMap students;
  • Implements the main(...) method that will call each of two methods
    1. void readFromPrompt() will use scanner to allow users to enter student data when prompted. Data entered will be used to create Student objects one at a time and add them to the HashMap.
       1. Uses a do/while loop and a boolean to ask if you want to create a Student. "y" for yes, "n" for no.
       2. If "y" then the program will present a succession of prompts to enter Student data. If "n" then the Boolean will be changed to false and the method will terminate with a message.
       3. See sample hint and sample run below
    2. void readFromFile() will read data from the student_data.txt file (provided) and create Student objects and add them to the same HashMap above. Don't forget to close the Scanner when finished.
  • void showStudents()will display the contents of the HashMap to the console calling Student.toString() for each Student

HINT: do/while

boolean proceed = true;

do {

System.out.println("Do you wish to create a Student? (y/n): ");

String choice = scanner.next().toLowerCase();

if (choice.equals("y")) {

// Here you will prompt for data, create Students and add

// to the HashMap. There will be a separate prompt for // each piece of data.

} else {

proceed = false;

}

} while (proceed);

Sample runtime:

DEBUG: calling readFromPrompt

Do you wish to create a Student? (y/n):

y

Enter first name:

Nosaj

Enter last name:

Nosirrah

Enter id number:

A00123456

Enter age as a whole number:

40

Enter grade as a decimal number:

94.6

Do you wish to create a Student? (y/n):

n

Data entry finished!

DEBUG: calling readFromFile

List of Students created

Student [firstName=Pike, lasName=Bass, idNumber=A00953177, age=22, grade=81.5, pass=true]

Student [firstName=Steed, lasName=Mare, idNumber=A00553954, age=44, grade=78.7, pass=true]

Student [firstName=Buck, lasName=Doe, idNumber=A00654321, age=36, grade=69.9, pass=true]

Student [firstName=Sunny, lasName=McCloud, idNumber=A00559633, age=25, grade=88.8, pass=true]

Student [firstName=Robin, lasName=Crow, idNumber=A00112233, age=43, grade=73.9, pass=true]

Student [firstName=Nosaj, lasName=Nosirrah, idNumber=A00123456, age=40, grade=94.6, pass=true]

Student [firstName=Catfish, lasName=Sturgeon, idNumber=A00456123, age=78, grade=56.7, pass=false]

public class Student { /** * Declaring class instance variables */ private String firstName; private String lastName; private String idNumber; private int age; private double grade; private boolean pass; private final static double PASSMARKS = 60; /** * Default constructor * @param firstName * @param lastName * @param idNumber * @param age * @param grade * @param pass */ public Student(final String firstName, final String lastName, final String idNumber, final int age, final double grade, final boolean pass) throws IllegalUserInputArgumentException, IllegalInvalidIdNumberArgumentException, IllegalAgeArgumentException, IllegalGradeArgumentException { validateFirstName(firstName); setLastName(lastName); setIdNumber(idNumber); setAge(age); setGrade(grade); setPass(pass); this.firstName = firstName; this.lastName = lastName; this.idNumber = idNumber; this.age = age; this.grade = grade; this.pass = pass; } /** * Overloaded constructor for all fields except pass * @param firstName * @param lastName * @param idNumber * @param age * @param grade */ public Student(final String firstName, final String lastName, final String idNumber, final int age, final double grade) throws IllegalUserInputArgumentException { this.firstName = firstName; this.lastName = lastName; this.idNumber = idNumber; this.age = age; this.grade = grade; } /** * * @returns the firstname */ public String getFirstName() { return firstName; } /** * * @returns the lasttname */ public String getLastName() { return lastName; } /** * * @returns the student ID number */ public String getIdNumber() { return idNumber; } /** * * @returns the age */ public int getAge() { return age; } /** * * @returns the grade */ public double getGrade() { return grade; } /** * * @returns the true or false if * student passed or failed */ public boolean getPassOrFail() { return pass; } /** * This setter method sets the firstname * @param firstName */ public void setFirstName(final String firstName) throws IllegalUserInputArgumentException { validateFirstName(firstName); } /** * This setter method sets the lastname * @param lastName */ public void setLastName(final String lastName) throws IllegalUserInputArgumentException { String lastNameValidation = "^[a-zA-Z]*"; if(!lastName.matches(lastNameValidation)) { throw new IllegalUserInputArgumentException("Invalid lastname: " + lastName); } this.lastName = lastName; } /** * This setter method sets the IdNumber * @param idNumber */ public void setIdNumber(final String idNumber) throws IllegalInvalidIdNumberArgumentException { String validateIdNumber = "^A?[0-9]{8}$"; if(!idNumber.matches(validateIdNumber)) { throw new IllegalInvalidIdNumberArgumentException("Invalid student id"); } this.idNumber = idNumber; } /** * This setter method sets the age * @param age */ public void setAge(final int age) throws IllegalAgeArgumentException { if(age <= 0) { throw new IllegalAgeArgumentException("Invalid age: " + age); } this.age = age; } /** * This setter method sets the grade * @param grade */ public void setGrade(final double grade) throws IllegalGradeArgumentException { String gradeValidation = "^[0-9]{2,3}(.)?[0-9]*"; if(grade <= 0) { throw new IllegalGradeArgumentException("Invalid grade: " + grade); } this.grade = grade; } /** * This setter method sets the pass true or false * @param pass */ public void setPass(final boolean pass) { this.pass = pass; } /*****************************************************************************************************************/ /** Creating Auxiliary private Methods */ /*****************************************************************************************************************/ /** * This private method checks if student passed or failed * If pass grade is grater or equal to passMarks returns true * otherwise returns false */ private boolean checkPassOrFail(final double grade) { boolean checkGrade = false; if(grade >= PASSMARKS ) { checkGrade = true; } else { checkGrade = false; } return checkGrade; } /** * This method validate the userInput. If userInput is invalid throws Exception * @param userInput */ private void validateFirstName(String userInput) throws IllegalUserInputArgumentException { String userInputValidationValidation = "^[a-zA-Z]*"; if(!userInput.matches(userInputValidationValidation)) { throw new IllegalUserInputArgumentException("Invalid input " + "( " + userInput + " ) " + " provided"); } this.firstName = userInput; } } 

public class Lab8Driver { public static void main(String[] args) { /** * Declaring variables to save the user input data */ String firstName = null; String lastName = null; String idNumber = null; int age = 0; double grade = 0.0; //Run while loop unit proceed is true boolean proceed = true; //Using Scanner to get user input Scanner scanner = new Scanner(System.in); //Creating Student class String type HashMap HashMap students = new HashMap<>(); do { System.out.println("Do you wish to create a Student? (y/n): "); String choice = scanner.next().toLowerCase(); scanner.nextLine(); if(choice.equals("y")) { System.out.println("Enter first name: "); firstName = scanner.nextLine(); System.out.println("Enter last name: "); lastName = scanner.nextLine(); System.out.println("Enter id number: "); idNumber = scanner.nextLine(); System.out.println("Enter age as a whole number: "); age = scanner.nextInt(); System.out.println("Enter grade as a decimal number: "); grade = scanner.nextDouble(); } else { proceed = false; System.out.println("Data entry finished"); } } while(proceed); scanner.close(); System.out.println(firstName + " " +lastName + " " + idNumber + " " + age + " " + grade); } }