Calculate marks and percentage using Packages

Q. Write a Package MCA which has one class Student. Accept student detail through parameterized constructor. Write display () method to display details. Create a main class which will use package and calculate total marks and percentage.

Answer:

It this example we create a package mca which is used to display the student records. This package is used by Studentmain class.

Student.java

package mca;
public class Student
{
     public int r_no;
     public String name;
     public int a,b,c;
     int sum=0;
     public Student(int roll, String nm, int m1,int m2,int m3)
     {
          r_no = roll;
          name = nm;
          a = m1;
          b = m2;
          c = m3;
          sum = a+b+c;
     }
     public void display()
     {
          System.out.println("Roll_no : "+r_no);
          System.out.println("Name    : "+name);
          System.out.println("-----MARKS-------");
          System.out.println("Sub 1     : "+a);
          System.out.println("Sub 2     : "+b);
          System.out.println("Sub 3     : "+c);
          System.out.println("Total     : "+sum);
          System.out.println("percentage: "+sum/3);
          System.out.println("------------------");
     }
}


StudentMain.java

import mca.Student;
import java.util.*;
import java.lang.*;
import java.io.*;
class StudentMain
{
     public static void main(String[] args)
     {
          String nm;
          int roll;
          Scanner sc = new Scanner(System.in);
          System.out.print("Enter Roll no:= ");
          roll = sc.nextInt();
          System.out.print("Enter Name:= ");
          nm = sc.next();
          int m1,m2,m3;
          System.out.print("Enter 3 sub mark:= ");
          m1 = sc.nextInt();
          m2 = sc.nextInt();
          m3 = sc.nextInt();
          Student s = new Student( roll,nm,m1,m2,m3);
          s.display();
     }
}


Output:

student packege
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