Write a java program utilizes 2 arrays, one dimensional, for student names and s

Question

Write a java program utilizes 2 arrays, one dimensional, for student names and student test grades. Prompt the user to input a student first name followed by a space and an integer test grade, then the user will press enter and you will prompt them again for a name and a test grade; for a total of 10 students and 10 grades.You must check that the user enters a grade that is >= 0 and <= 100. If not, you must prompt the user with an error message and the user must input the grade again. Use a sort() method to sort both arrays(remember that each array holds a name related to a grade. If you move a grade in one array, you should move the name to the corresponding index in the name array) .

Explanation / Answer

StudentGradeDetails.java

import java.util.Scanner;

public class StudentGradeDetails {

  
   public static void main(String[] args) {
       Scanner scan = new Scanner(System.in);
       String names[] = new String[10];
       int grades[] = new int[10];
       for(int i=0; i<names.length; i++){
           System.out.print("Enter first name followed by a space and test grade: ");
           names[i] = scan.next();
           grades[i] = scan.nextInt();
           if(grades[i] <0 || grades[i] > 100){
               System.out.print("Invalid grade. ");
               i--;
           }
          
       }
       System.out.println("Before sorting, Student details are: ");
       for(int i=0; i<grades.length; i++){
           System.out.println(names[i]+" "+grades[i]);
       }
       sort(names, grades);
       System.out.println();
      
       System.out.println("After sorting, Student details are: ");
       System.out.println();
       for(int i=0; i<grades.length; i++){
           System.out.println(names[i]+" "+grades[i]);
       }

   }
   public static void sort(String names[], int grades[]){
       int n = grades.length;
int temp = 0;
String tempStr = "";
for(int i=0; i < n; i++){
for(int j=1; j < (n-i); j++){
  
if(grades[j-1] < grades[j]){
//swap the elements!
temp = grades[j-1];
grades[j-1] = grades[j];
grades[j] = temp;

tempStr = names[j-1];
names[j-1] = names[j];
names[j] = tempStr;
}
  
}
}
   }

}

Output:

Enter first name followed by a space and test grade: Suresh 88
Enter first name followed by a space and test grade: Sekhar 99
Enter first name followed by a space and test grade: Anshu 101
Invalid grade. Enter first name followed by a space and test grade: Anshu 98
Enter first name followed by a space and test grade: Revathi 44
Enter first name followed by a space and test grade: aaa 4
Enter first name followed by a space and test grade: rrr 66 yyy 77
Enter first name followed by a space and test grade: Enter first name followed by a space and test grade: hhhh 8
Enter first name followed by a space and test grade: vvvv 11
Enter first name followed by a space and test grade: gggg 67
Before sorting, Student details are:
Suresh 88
Sekhar 99
Anshu 98
Revathi 44
aaa 4
rrr 66
yyy 77
hhhh 8
vvvv 11
gggg 67

After sorting, Student details are:

Sekhar 99
Anshu 98
Suresh 88
yyy 77
gggg 67
rrr 66
Revathi 44
vvvv 11
hhhh 8
aaa 4

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