(Sort students on grades) Rewrite Listing 1, GradeExam.java, to display the students in in...

(Sort students on grades) Rewrite Listing 1, GradeExam.java, to display the students in increasing order of the number of correct answers.

LISTING 1 GradeExam.java

1 public class GradeExam {
2 /** Main method */
3 public static void main(String[] args) {
4 // Students' answers to the questions
5 char[][] answers = {
6 {'A', 'B', 'A', 'C', 'C', 'D', 'E', 'E', 'A', 'D'},
7 {'D', 'B', 'A', 'B', 'C', 'A', 'E', 'E', 'A', 'D'},
8 {'E', 'D', 'D', 'A', 'C', 'B', 'E', 'E', 'A', 'D'},
9 {'C', 'B', 'A', 'E', 'D', 'C', 'E', 'E', 'A', 'D'},
10 {'A', 'B', 'D', 'C', 'C', 'D', 'E', 'E', 'A', 'D'},
11 {'B', 'B', 'E', 'C', 'C', 'D', 'E', 'E', 'A', 'D'},
12 {'B', 'B', 'A', 'C', 'C', 'D', 'E', 'E', 'A', 'D'},
13 {'E', 'B', 'E', 'C', 'C', 'D', 'E', 'E', 'A', 'D'}};
14
15 // Key to the questions
16 char[] keys = {'D', 'B', 'D', 'C', 'C', 'D', 'A', 'E', 'A', 'D'};
17
18 // Grade all answers
19 for (int i = 0; i
20 // Grade one student
21 int correctCount = 0;
22 for (int j = 0; j
23 if (answers[i][j] == keys[j])
24 correctCount++;
25 }
26
27 System.out.println("Student " + i + "'s correct count is " +
28 correctCount);
29 }
30 }
31 }