one_Student.java

/*   Created by IntelliJ IDEA.
 *   Author: Kshitij Varshney (kshitijvarshne1)
 *   Date: 18-Jan-21
 *   Time: 10:26 AM
 *   File: Student.java
 */

package jan18_21_NK.one;

public class Student {
    private static String universityName;
    private static String nameOfStream;

    static {
        universityName = "GLA";
        nameOfStream = "B.Tech";
    }

    private int id;
    private int marks;
    private String studentName;

    public Student(int id, int marks, String studentName) {
        this.id = id;
        this.marks = marks;
        this.studentName = studentName;
    }

    public String getUniversityName() {
        return universityName;
    }

    public void setUniversityName(String universityName) {
        Student.universityName = universityName;
    }

    public String getNameOfStream() {
        return nameOfStream;
    }

    public void setNameOfStream(String nameOfStream) {
        Student.nameOfStream = nameOfStream;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public int getMarks() {
        return marks;
    }

    public void setMarks(int marks) {
        this.marks = marks;
    }

    public String getStudentName() {
        return studentName;
    }

    public void setStudentName(String studentName) {
        this.studentName = studentName;
    }
}

//instance :- memory allocate at the time of object creation :---- Heap Area
//statoc variable : - memory allocate at the time of loading of load file :----

one_StudentMain.java

/*   Created by IntelliJ IDEA.
 *   Author: Kshitij Varshney (kshitijvarshne1)
 *   Date: 18-Jan-21
 *   Time: 10:29 AM
 *   File: StudentMain.java
 */

package jan18_21_NK.one;

import java.util.InputMismatchException;
import java.util.Scanner;

public class StudentMain {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int limit = sc.nextInt();
        int id = 0;
        int marks = 0;
        String studentName = null;
        Student[] studentArray = new Student[limit];
        for (int i = 0; i < limit; i++) {
            try {
                id = sc.nextInt();
                marks = sc.nextInt();
                sc.nextLine();
                studentName = sc.nextLine();
            } catch (InputMismatchException a) {
                System.out.println("Stop the program and again provide the value for object");
                a.printStackTrace();
            }
            Student obj = new Student(id, marks, studentName);
            studentArray[i] = obj;
        }
        sc.close();
        int sum = 0;
        for (int i = 0; i < limit; i++) {
            sum += studentArray[i].getMarks();

        }
        float average = sum / limit;
        System.out.println("Average :- " + average);
    }
}
// for line no 28
/*
 catch(NumberFormatException a){
    sout("Any message");
    a.printStackTrace();
}
*/