Code in JAVA For this option the user has to enter the stude

Code in JAVA:

For this option the user has to enter the student ID. The details of the student with the entered ID is displayed if it is found, otherwise a message is displayed to tell the user the student does not exist.

Please follow the code and comments for description :

CODE :

import java.util.*; // required imports

public class Student { // class that runs the code with the respective methods

    private final int sId; // instance variables for the class
    private final String sName;
    private final int sAge;
    private final String sCourse;
    private final String sYear;
    private final String sSection;

    public Student(int ID, String name, int age, String course, String year, String section) { // parameterised constructor
        sId = ID;
        sName = name;
        sAge = age;
        sCourse = course;
        sYear = year;
        sSection = section;
    }

    public int getsId() { // methods that gets the data from the constructor
        return sId;
    }

    public String getName() {
        return sName;
    }

    public int getAge() {
        return sAge;
    }

    public String getCourse() {
        return sCourse;
    }

    public String getYear() {
        return sYear;
    }

    public String getSection() {
        return sSection;
    }

    @Override
    public String toString() { // string method that returns the data required by the user
        return \"\ Student ID : \" + sId + \"\ Name : \" + sName + \"\ Age : \" + sAge + \"\ Course : \" + sCourse + \"\ Year : \" + sYear + \"\ Section : \" + sSection;
    }

    public static void main(String[] args) { // driver method

        ArrayList<Student> students = new ArrayList<>(); // arraylist that has the data stored
        Scanner input = new Scanner(System.in); // scanner class that gets the data from the user

        int menuChoice = 0; // required initialisations

        do { // iteratingover the options entered by the user
            System.out.println(\"\ \\t\\t\\tStudent Data\"); // prompt for the user about the data and the code
            System.out.println(\"\ 1. Add a Student.\ 2. Search For a Student.\ 3. Exit\");
            try {
                System.out.println(\"\ Enter a choice : \"); // getting the choice
                menuChoice = Integer.parseInt(input.nextLine());
            } catch (NumberFormatException e) { // catch the exception if any
                continue;
            }

if (menuChoice == 1) { // if the option is 1

                int id = -1; // get the full details for the student
                do {
                    try {
                        System.out.println(\"Enter the Id : \");
                        id = Integer.parseInt(input.nextLine());
                    } catch (NumberFormatException e) {
                        System.out.println(\"Enter a number!\");
                    }
                } while (id <= 0);

System.out.println(\"Enter the Full name : \"); // enter the name and the details
String name = input.nextLine();

                int age = -1;
                do {
                    try {
                        System.out.println(\"Enter the Age :\"); // enter the age
                        age = Integer.parseInt(input.nextLine());
                    } catch (NumberFormatException e) {
                        System.out.println(\"Enter a number!\");
                    }
                } while (age <= 0);

System.out.println(\"Enter the Course : \"); // enter the course details
String course = input.nextLine();

System.out.println(\"Enter the Year : \");
String year = input.nextLine();

System.out.println(\"Enter the Section : \");
String section = input.nextLine();

Student student = new Student(id, name, age, course, year, section);
students.add(student);

            } else if (menuChoice == 2) { // if the choice is 2

                boolean sFlag = false;
                int id = -1;

                do {
                    try {
                        System.out.println(\"Enter the Student Id to search : \"); // get the data to search
                        id = Integer.parseInt(input.nextLine()); // getting the data
                    } catch (NumberFormatException e) {
                        System.out.println(\"Enter a number!\");
                    }
                } while (id <= 0);

                for (Student student : students) { // iterating over the list
                    if (student.sId == id) { // check for the id
                        sFlag = true;
                        System.out.println(\"\ The Required Student Data is : \" + student); // print the data if found
                    } else {
                        sFlag = false;
                    }
                }

                if (sFlag == false) {
                    System.out.println(\"Sorry.! The Student Does Not Exist.\"); // message if the data is not found
                }
            } else if(menuChoice == 3) { // if the choice is 3
                System.out.println(\"Bye.!\"); // exit the code
            }
        } while (menuChoice < 3);
    }
}