#33 Known is a drop Mark calculating system - Mini Project

Mark calculating system

package twelfth;

import java.util.InputMismatchException;
import java.util.Scanner;

public class TwelfthMark {
    static String School = "Good Hope Higher secondary school";
    String name;
    int marks[] = new int[6];

    public void getName(Scanner sc) {
        while (true) {
            System.out.println("Enter the student name");
            name = sc.nextLine();
            if (!name.isBlank()) {
                break;

            }
            System.out.println("\"Name cannot be empty\"");
        }
    }

    public void printScore(double sum) {
        System.out.println("Total mark scored " + sum);
        System.out.printf("Average :%.2f\n", (sum / 6));
        double percentage = (sum / 600) * 100.0;
        System.out.printf("Percentage: %.2f%%", percentage);

    }

    public static void main(String[] args) {
        String group1[] = { "Biology", "English", "Tamil", "Maths", "Physics", "Chemistry" };
        String group2[] = { "Computer Science", "English", "Tamil", "Maths", "Physics", "Chemistry" };
        String group3[] = { "Accountancy", "English", "Tamil", "Business Studies", "Computer Science/Math",
                "Economics" };
        TwelfthMark twelfth = new TwelfthMark();
        Scanner sc = new Scanner(System.in);

        twelfth.getName(sc);

        System.out.println("Enter the group name-a.1st Group b.2nd Group c.3rd Group");

        String group = sc.nextLine();
        double sum = 0;

        switch (group.toLowerCase()) {
        case "1st Group", "a", "1" -> {
            try {
                for (int i = 0; i <= 5; i++) {
                    System.out.println("Enter the mark of  " + group1[i]);

                    twelfth.marks[i] = sc.nextInt();

                    sum = sum + twelfth.marks[i];
                }
                twelfth.printScore(sum);
            } catch (InputMismatchException e) {
                System.out.println("\"Enter only numbers\"");

            }
        }
        case "2nd Group", "b", "2" -> {
            try {
                for (int i = 0; i <= 5; i++) {
                    System.out.println("Enter the mark of  " + group2[i]);

                    twelfth.marks[i] = sc.nextInt();

                    sum = sum + twelfth.marks[i];

                }
                twelfth.printScore(sum);
            } catch (InputMismatchException e) {
                System.out.println("Enter only numbers");
            }

        }

        case "3rd Group", "c", "3" -> {
            try {
                for (int i = 0; i <= 5; i++) {
                    System.out.println("Enter the mark of  " + group3[i]);

                    twelfth.marks[i] = sc.nextInt();

                    sum = sum + twelfth.marks[i];
                }
                twelfth.printScore(sum);
            } catch (InputMismatchException e) {
                System.out.println("Enter only numbers");
            }
        }
        default -> System.out.println("Enter valid group ");
        }

        sc.close();
    }
}