Java Write a class encapsulating the concept of student grades on a test, assumi

Question

Java

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 will 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 the 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 in the array of counter should correspond to the same index in the array of grades - use that index to find the grade value that is the mode)

Write a client class to test all your methods.

Explanation / Answer

Implemented following 5 sub-parts of the problem:
1)A constructor with just one parameter, the number of students; all grades will be randomly generated.

2)A method returning an array of the grades sorted in ascending order.
3)--A method returning the highest grade --a method returning the average grade
4)--a method returning the median grade[Hint: the median grade will be located in the middle of the sorted array of grades]

5)Write a client class to test all your methods
import java.util.Random;



public class StudentGradesRandomTest {

   public static void main(String[] args)
   {
       StudentGradesRandom sg = new StudentGradesRandom(15);
      
       System.out.println(" Random Grades generated:");
       StudentGradesRandom.printGrades(sg.getGrades());
      
       System.out.println(" Sorted Grades generated:");
       StudentGradesRandom.printGrades(sg.sortGradesAsc());
      
       System.out.println(" Highest Grade:"+sg.getHighestGrade());
       System.out.println(" Median Grade:"+sg.getMedianGrade());
   }
}

class StudentGradesRandom {
  
   private int[] grades;
  
   public StudentGradesRandom(int students) {
      
       Random rand = new Random();
       int max = 100;
       int min = 0;
      
       grades = new int[students];
       for(int i=0; i < students; i++)
           grades[i] = rand.nextInt((max - min) + 1) + min;
   }
  
   public int[] sortGradesAsc() {
       int[] sortedArr = new int[grades.length];
       for(int i=0; i < grades.length; i++) {
           sortedArr[i] = grades[i];
       }
       int temp;
       for(int i=0; i < sortedArr.length; i++) {
           for(int j=0; j < sortedArr.length; j++) {
               if(sortedArr[i] < sortedArr[j]) {
                   temp = sortedArr[i];
                   sortedArr[i] = sortedArr[j];
                   sortedArr[j] = temp;
               }
           }
       }
       return sortedArr;
   }
  
   public int getHighestGrade() {
       int max = 0;
       for(int i=0; i < grades.length; i++) {
           if(max < grades[i])
               max = grades[i];
       }
       return max;
   }
  
   public int getMedianGrade() {
       int median = 0;
      
       int sortedGrades[] = sortGradesAsc();
       //middle of the sorted array
       median = sortedGrades[sortedGrades.length/2-1];
       return median;
   }
  
   public int[] getGrades() {
       return grades;
   }
  
   public static void printGrades(int[] grades) {
       for(int i=0; i < grades.length; i++)
           System.out.print(grades[i]+" ");
       System.out.println();
   }
}

---output---

Random Grades generated:
58 92 3 81 62 20 65 42 5 96 39 76 46 51 97
Sorted Grades generated:
3 5 20 39 42 46 51 58 62 65 76 81 92 96 97
Highest Grade:97
Median Grade:51

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