Solve question 3.2 about java-hacktoberfest23 HOT 5 CLOSED

`
public class School {
    // Data Members
    private int rollNo;
    private String name;
    private String address;
    private String branch;
    private double[] marks; // Marks in 4 subjects
    private double percentage;
    private char grade;

    // Constructor to initialize the data members
    public School(int rollNo, String name, String address, String branch, double[] marks) {
        this.rollNo = rollNo;
        this.name = name;
        this.address = address;
        this.branch = branch;
        this.marks = marks;
        calculatePercentageAndGrade();
    }

    // Method to calculate the percentage and grade
    private void calculatePercentageAndGrade() {
        double totalMarks = 0;
        for (double mark : marks) {
            totalMarks += mark;
        }
        percentage = totalMarks / 4.0;

        if (percentage >= 90) {
            grade = 'A';
        } else if (percentage >= 80) {
            grade = 'B';
        } else if (percentage >= 70) {
            grade = 'C';
        } else if (percentage >= 60) {
            grade = 'D';
        } else {
            grade = 'F';
        }
    }

    // Method to display student information
    public void displayStudentInformation() {
        System.out.println("Roll No: " + rollNo);
        System.out.println("Name: " + name);
        System.out.println("Address: " + address);
        System.out.println("Branch: " + branch);
        System.out.println("Marks in 4 Subjects: ");
        for (int i = 0; i < marks.length; i++) {
            System.out.println("Subject " + (i + 1) + ": " + marks[i]);
        }
        System.out.println("Percentage: " + percentage);
        System.out.println("Grade: " + grade);
    }

    public static void main(String[] args) {
        // Example usage
        double[] studentMarks = {85.5, 92.0, 78.5, 89.0};
        School student = new School(101, "John Doe", "123 Main St", "Science", studentMarks);
        student.displayStudentInformation();
    }
}

`

// Constructor to initialize student information
public School(int rollNo, String name, String address, String branch, double[] marks) {
    this.rollNo = rollNo;
    this.name = name;
    this.address = address;
    this.branch = branch;
    this.marks = marks;
    this.calculatePercentage();
    this.calculateGrade();
}

// Calculate percentage based on marks
private void calculatePercentage() {
    double totalMarks = 0;
    for (double mark : marks) {
        totalMarks += mark;
    }
    this.percentage = (totalMarks / (marks.length * 100)) * 100;
}

// Calculate grade based on percentage
private void calculateGrade() {
    if (percentage >= 90) {
        this.grade = 'A';
    } else if (percentage >= 80) {
        this.grade = 'B';
    } else if (percentage >= 70) {
        this.grade = 'C';
    } else if (percentage >= 60) {
        this.grade = 'D';
    } else {
        this.grade = 'F';
    }
}

// Display student information
public void displayStudentInfo() {
    System.out.println("Student Information:");
    System.out.println("Roll No: " + rollNo);
    System.out.println("Name: " + name);
    System.out.println("Address: " + address);
    System.out.println("Branch: " + branch);
    System.out.println("Marks (Subject-wise):");
    for (int i = 0; i < marks.length; i++) {
        System.out.println("Subject " + (i + 1) + ": " + marks[i]);
    }
    System.out.println("Percentage: " + percentage + "%");
    System.out.println("Grade: " + grade);
}

public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);

    // Input student information
    System.out.print("Enter Roll No: ");
    int rollNo = scanner.nextInt();
    scanner.nextLine(); // Consume the newline
    System.out.print("Enter Name: ");
    String name = scanner.nextLine();
    System.out.print("Enter Address: ");
    String address = scanner.nextLine();
    System.out.print("Enter Branch: ");
    String branch = scanner.nextLine();
    System.out.print("Enter Marks in 4 Subjects (space-separated): ");
    double[] marks = new double[4];
    for (int i = 0; i < 4; i++) {
        marks[i] = scanner.nextDouble();
    }

    // Create a School object with the entered information
    School student = new School(rollNo, name, address, branch, marks);

    // Display student information
    student.displayStudentInfo();
}