Course Management System

 import java.util.InputMismatchException;

import java.util.Scanner;
// Author : Abhinav
public class CourseSystem extends Log{

    public static void main(String[] args) {
        CourseSystem ob = new CourseSystem();
        Scanner in = new Scanner(System.in);
        ob.logging();

}
}

class Admin_Feature{
    Scanner in=new Scanner(System.in);
    void add_student(){
        System.out.println("Enter name of Student");
        String name_student=in.nextLine();
        System.out.println("Enter Roll No of  Student");
        long roll_no=in.nextLong();
    }
     void add_Course(){
        System.out.println("Enter name of Course");
        String name_student=in.nextLine();
        System.out.println("Enter Teacher Name");
        String name_teacher=in.next();
    }


}
class Student_Feature {

}
class Course_Management{

}

class Student_Information{
    String[] strname ;
    String[] strpass;
    protected Student_Information() {
    strname=new String[10];
    strpass=new String[10];
        strname[0]="Abhinav";
        strname[1]="Mohit";
        strname[2]="Sangeeta";
        strname[3]="Mayur";
        strname[4]="Prashant";
        strpass[0]="0000";
        strpass[1]="0000";
        strpass[2]="0000";
        strpass[3]="0000";
        strpass[4]="0000";
    }

}
class Admin_Information{
    String[] admin_name;
    String[] admin_pass;
    Admin_Information(){
        admin_name=new String[10];
        admin_pass=new String[10];
    }
     void Admin_info(){
         admin_name[0]="Abhi";
         admin_pass[0]="qwerty";

     }
}
class Log extends Student_Information{
    Scanner in = new Scanner(System.in);
    String name;
    String password;
    int space,n;
    Log() {
        name = "";
        password = "";
        space=check(strname)-1;
    }
    void log(){
            System.out.println("Enter Name ");
            name = in.next();
            System.out.println("Enter Password");
            password = in.next();
            if (check_log()) {
                System.out.println("User Available");
                System.out.println("Test Pass");
            } else
                System.out.println("User Does Not Exist");
        }
        int check(String arr[])
        {
            int count=0;
            for (int i = 0; i <arr.length; i++) {
                if(arr[i]!=null)
                    count++;

            }
            return count;
        }
        // condition area
        boolean binary_search(String[] arr, String search) {
            int l = 0;

            while (l <= space) {
                int mid = (l + space) / 2;
                if (arr[mid].equals(search))
                {
                    return true;
                }
                // if search element is smaller than middle element
                if (arr[mid].compareTo(search) > 0) {
                    space = mid - 1;
                } else
                    l = mid + 1;

            }
            return false;
        }

        //Checking logging information
        boolean check_log() {
            if (binary_search(strname, name)) {
                if (binary_search(strpass,  password)) {
                    return true;
                }
            }
            return false;
        }
          void logging(){
         System.out.println("Welcome To Course Management System");
        try{
            System.out.println("Space Available "+space);
        System.out.println("Press 1 for Admin Login \n Press 2 for Student login");
        int choice = in.nextInt();
        switch (choice) {
            case 1:
                System.out.println("\tAdmin Login");
                log();
                break;
                case 2:
                System.out.println("\tStudent Login");
                log();
                break;
        }
    }
        catch (InputMismatchException e){
        System.out.println("Please Enter 1 and 2");

    }
          }


}