Question

Java - In NetBeans IDE:

• Create a class called Student which stores:

- the name of the student

- the grade of the student

• Write a main method that asks the user for the name of the input file and the name of the output file. Main should open the input file for reading . It should read in the first and last name of each student into the Student’s name field. It should read the grade into the grade field.

• Calculate the average of all students’ grades.

• Open the output file, for writing, and print all the students’ names on one line and the average on the next line.

• Average should only have 1 digit after the decimal

• “Average” should be left justified in a field of 15 characters. The average # should be right justified in a field of 10 spaces

Answer 1

import java.util.Scanner;
public class student
{
String name;
int sub[];
double avg=0;
   public student()
   {
    Scanner sc=new Scanner(System.in);
    sub=new int[5];
    System.out.println("Enter the name student:");
    name=sc.nextLine();
    int i;

    for(i=0;i<5;i++)
    {
   System.out.println("Enter the marks of subject "+(i+1));
   sub[i]=sc.nextInt();
   avg+=sub[i];
     
   }
   avg/=5;
     
   }

   public void getGrade()
   {
   System.out.println("Result of"+name+":");
   for(int i=0;i<5;i++)
{
   System.out.println("Marks of "+i+1+":"+sub[i]);
   }
   System.out.println("Grade point average:"+avg/10);
      
   }
}

import java.util.Scanner;
public class TestStudent
{
   public static void main(String args[])
   {
   Scanner sc=new Scanner(System.in);
   System.out.println("Enter the number of student");
   int n=sc.nextInt();
   student stu[]=new student[n];
   for(int i=0;i<n;i++)
   {
   student st=new student();
   stu[i]=st;
      
   }
   String c="";
   while(true)
   {
   System.out.println("Enter the student index to know the detail");
   System.out.println("Type enter to exit");
   c=sc.next();
   if(c.equals("exit"))
   {
   break;
      
   }
   else
   {
   int num=Integer.parseInt(c);
   stu[num].getGrade();
}
}
}
}