Write a program in Java using arrays:
(a) To store the Roll No., Name and marks in six subjects for 100 students.
(b) Calculate the percentage of marks obtained by each candidate. The maximum marks in each subject are 100.
(c) Calculate the Grade as per the given criteria:

Percentage Marks	Grade
From 80 to 100	A
From 60 to 79	B
From 40 to 59	C
Less than 40	D

import java.util.Scanner;

public class KboatSDAGrades
{
    public static void main(String args[]) {
        final int TOTAL_STUDENTS = 100;
        Scanner in = new Scanner(System.in);
        
        int rollNo[] = new int[TOTAL_STUDENTS];
        String name[] = new String[TOTAL_STUDENTS];
        int s1[] = new int[TOTAL_STUDENTS];
        int s2[] = new int[TOTAL_STUDENTS];
        int s3[] = new int[TOTAL_STUDENTS];
        int s4[] = new int[TOTAL_STUDENTS];
        int s5[] = new int[TOTAL_STUDENTS];
        int s6[] = new int[TOTAL_STUDENTS];
        double p[] = new double[TOTAL_STUDENTS];
        char g[] = new char[TOTAL_STUDENTS];
        
        for (int i = 0; i < TOTAL_STUDENTS; i++) {
            
            System.out.println("Enter student " + (i+1) + " details:");
            System.out.print("Roll No: ");
            rollNo[i] = in.nextInt();
            in.nextLine();
            System.out.print("Name: ");
            name[i] = in.nextLine();
            System.out.print("Subject 1 Marks: ");
            s1[i] = in.nextInt();
            System.out.print("Subject 2 Marks: ");
            s2[i] = in.nextInt();
            System.out.print("Subject 3 Marks: ");
            s3[i] = in.nextInt();
            System.out.print("Subject 4 Marks: ");
            s4[i] = in.nextInt();
            System.out.print("Subject 5 Marks: ");
            s5[i] = in.nextInt();
            System.out.print("Subject 6 Marks: ");
            s6[i] = in.nextInt();
            
            p[i] = (((s1[i] + s2[i] + s3[i] + s4[i] 
                    + s5[i] + s6[i]) / 600.0) * 100);
                    
            if (p[i] < 40)
                g[i] = 'D';
            else if (p[i] < 60)
                g[i] = 'C';
            else if (p[i] < 80)
                g[i] = 'B';
            else
                g[i] = 'A';
        }
        
        System.out.println();
        
        for (int i = 0; i < TOTAL_STUDENTS; i++) {
            System.out.println(rollNo[i] + "\t" 
                + name[i] + "\t" 
                + p[i] + "\t" 
                + g[i]);
        }
    }
}