Answer to Question #259942 in Java | JSP | JSF for Wunna

Question

Create a program with three methods/functions, The first one takes in n which is the size of an array then creates and populate the array with student names, the second method takes in n which is the size of an array then creates and populate n by 3 array with student marks(The three marks are for test 1 - 3) and finally a method that takes in the two arrays, calculates the final mark of all test and print out the results as indicated below: The first method should return and array of names and the second should return an array all test marks(i.e. 2d array with 3 columns). The third method in addition should also return an array for all the final marks

Name Test 01        Test 02        Test 03        Final

-------- ---------     ---------     ---------    ---------

Gerry 55               55               55               55

Sample Test 1:

Enter the total number of students:

1

Enter name:

koko

Enter mark for Test 1:

78

Enter mark for Test 2:

65

Enter mark for Test 3:

70

Name Test01 Test02 Test03 Final

------  ------  ------   ------  -----

koko  78    65    70    71

Answer 1

package student;


import java.util.Arrays;
import java.util.Scanner;




public class Student {


    String [] names(int n){
         System.out.println("Enter the student names\n");
        Scanner scan = new Scanner(System.in);
        String [] student_names = new String[n];
        
        for(int i=0; i<n; i++){
         System.out.println("Name "+(i+1));
          student_names[i] = scan.nextLine();
        }
        
        return student_names;
    }
    
    int [] [] marks(int n){
        
        int [] [] student_marks = new int[n][3];
        for(int i=0; i<n; i++){
            
            for(int j=0; j<3; j++){
                System.out.println("Enter mark for Test "+(j+1));
                
                Scanner scan = new Scanner(System.in);
                student_marks[i][j] = scan.nextInt();
            }
        }
        
        return student_marks;
    }
    
    int [] display(String student_names[], int student_marks[][]){
        System.out.println("Name   Test 01      Test 02     Test 03       Final");
        System.out.println("----   -------      -------     --------    ---------");
        int [] final_mark = new int[student_names.length];
        for(int i=0; i<student_names.length; i++){
            int sum = 0;
            System.out.printf("%s      ",student_names[i]);
            for(int j=0; j<3; j++){
            System.out.printf("%d      ",student_marks[i][j]); 
            sum += student_marks[i][j];
            }
            System.out.printf("%d      ",sum /3);
            final_mark[i]  = sum /3;
        }
        return final_mark;
    }
    
    public static void main(String[] args) {
        Student stu = new Student();
        int [] results = stu.display(stu.names(1), stu.marks(1));
        
        System.out.println(Arrays.toString(results));
    }
    
}