Write a class encapsulating the concept of student grades on

Write a class encapsulating the concept of student grades on a test, assuming student grades are composed of a list of integers between 0 and 100. Write the following methods: - A constructor with just one parameter, the number of students; all grades can be randomly generated. - Accessor, mutator, toString, and equals methods. - A method returning an array of the grades sorted in ascending order. - A method returning the highest grade. - A method returning the average grade. - A method returning the median grade (Hint: The median grade will be located in the middle of the sorted array of grades.) - A method returning the mode (the grade that occurs most often). (Hint: Create an array of counters; count how many times each grade occurs; then pick the maximum in the array of counters; the array index is the mode.) Write a client class to test all the methods in your class.

Thank you for your help!

Solution

import java.util.Arrays;
import java.util.Random;

public class tut
{
   public static void main (String [] args)
   {
       //generating random number
       Random rand = new Random();
       //number of student in class
       int number_of_student = 70;
       int sum=0;
       int median;

       int [] myArray = new int[number_of_student];
      
       // alloting random number in the array
       for (int i=0 ; i < number_of_student ; i++){
           int a =0;
           //System.out.println(i);
           a = rand.nextInt(100) + 1;
           myArray[i]=a;
           sum = sum +a;
       }
       // sort the array
       Arrays.sort( myArray );

       //finding the median of the array
       int middle = ((myArray.length) / 2);
       if(myArray.length % 2 == 0){
           int medianA = myArray[middle];
           int medianB = myArray[middle-1];
           median = (medianA + medianB) / 2;
       }
       else{
            median = myArray[middle + 1];
       }

       System.out.println(\"list of array : \");
       System.out.println(Arrays.toString(myArray));
       System.out.println(\"Highest Grade : \" + myArray[number_of_student-1]);
      
       System.out.println(\"Average of the class : \" + sum/number_of_student);

       System.out.println(\"Median : \" + median);

       System.out.println(\"Mode : \" + mode(myArray));

      
   }
   public static int mode(int[] input) {

int[] count = new int[101];

//count the occurrences
for (int i=0; i < input.length; i++) {
count[input[i]]++;
}

//go backwards and find the count with the most occurrences
int index = count.length-1;
for (int i=count.length-2; i >=0; i--) {
if (count[i] >= count[index])
index = i;
}

return index;
   }
   public static void rand_array (int[] input){

   }
}