Java Problem: Grading a Multiple-Choice Test and Sorting The Results

The problem is to write a program that grades multiple-choice tests. Suppose there are eight students and ten questions, and the answers are stored in a two-dimensional array. Each row records a student’s answers to the questions, as shown in the following array.

The key is stored in a one-dimensional array:

Key to the Questions: 0 1  2  3  4 5  6  7 8  9

                                  D B D C C D A E A D

Your program grades the test and displays the result. It compares each student’s answers with the key, counts the number of correct answers, sort grades in increasing order by keeping  student's number. Output:

import java.util.Scanner; public class twoDimentionalArrays {   public static void main (String[] args)   {     Scanner scan = new Scanner (System.in);     String[] key = { "D" , "B" , "D" , "C" , "C" , "D" ,          "A" , "E" , "A" , "D" };     System.out.println("Fill in the eight student's ans" +         "wers to 10 questions");     String[][] list = new String[8][10];     int[][] sort = new int[8][1];     for (int i =0;i<list.length;i++)     {       int count =0;       for (int j =0;j<list[i].length;j++)       {         list[i][j] = scan.next();         if(list[i][j].equalsIgnoreCase(key[j]))         {  count++;           sort[i][0] = count;         }                }     }   int[] students = { 0 ,1 ,2 ,3 ,4 ,5 ,6, 7};   for (int i =0;i<sort.length;i++)     {       for (int j=0;j<sort.length-1;j++)       {         if (sort[j][0] > sort[j+1][0])         {           int temp = sort[j][0];                     sort[j][0] = sort[j+1][0];           sort[j+1][0] = temp;                      int temp2 = students[j];           students[j] = students[j+1];           students[j+1]= temp2;         }       }     }      for (int i =0;i<sort.length;i++)     {       System.out.println("Student "+ students[i]+" score per order " + sort[i][0]);     }        } }