import java.util.Scanner;

    public class Main {

      public static void main(String[] args) {

          University uni = new University();
            // فكر هنا كيف يمكن إضافة الطلاب للجامعة
            // هل يتطلب مصفوفة أم نوع بيانات أخرى؟

            int operation = 0;
            while (operation != 6) {

                System.out.println("What Operation do you want to do?");
                System.out.println("1- add Student");
                System.out.println("2- view Students");
                System.out.println("3- search Student");
                System.out.println("4- edit Student info");
                System.out.println("5- delete Student");
                System.out.println("6- End Programm");

                
                Scanner r = new Scanner(System.in);
                operation = r.nextInt();

                switch (operation) {
                    case 1:
                            /* TODO
                              أ) اطلب من المستخدم إدخال معلومات الطالب
                              ب) قم بإنشاء نموذج instance للصنف Student مع هذه المعلومات
                              ج) احفظ النموذج في برنامجنا نظام إدارة الطلاب
                            break;
                    case 2:
                            /* TODO
                              أ) قم بعرض رقم الطالب على الشاشة والاسم والكنية لكل الطلاب الذين تم حفظهم 
                    
                            */
                            break;
                }
   
            }
        }
    }



  

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        
        University uni = new University();
        
        int operation = 0;

        while (operation != 16) {

                System.out.println("What Operation do you want to do?");
                System.out.println("1- add Student");
                System.out.println("2- view Students");
                System.out.println("3- search Student");
                System.out.println("4- edit Student info");
                System.out.println("5- delete Student");

                System.out.println("6- add a Lecturer");
                System.out.println("7- view the Lecturers ");
                System.out.println("8- search Lecturer");
                System.out.println("9- edit Lecturer info");
                System.out.println("10- delete Lecturer");

                System.out.println("11- add Lesson");
                System.out.println("12- view the Lessons");
                System.out.println("13- search Lesson");
                System.out.println("14- edit Lesson info");
                System.out.println("15- delete Lesson");
            
                System.out.println("16- End Programm");

                Scanner r = new Scanner(System.in);
                operation = r.nextInt();

                switch (operation) {
                    case 1:
                        // الكود نفسه من التمارين السابقة
                        * TODO: تحقق من رقم الطالب المُعطى
                                وقم بإنشاء Student-Object جديد 
                                فقط في حال كان رقم الطالب صالح
                        */
                        break;
                    case 2:
                        // الكود نفسه من التمارين السابقة
                        break;
                    case 3:
                        /* TODO
                          a) اطلب رقم الطالب
                          b) أعط معلومات الطالب على الشاشة أو رسالة خطأ في حال عدم تواجده
                        */
                        break;
                    case 4:
                        // لاحقا
                        break;
                    case 5:
                        /* TODO
                          a) اطلب رقم الطالب
                          b) احذف الطالب من النظام أو أعط رسالة خطأ حال عدم تواجده
                        */
                        break;
                    case 6:
                        /* TODO
                           a) اطلب معلومات المدرس من المستخدم
                           b) استخدم هذه المعلومات لإنشاء عنصر من صنف المدرس حال عدم تواجده
                        */
                        break;
                    case 7:
                        /* TODO
                           a) أعطِ أسماء وكنى جميع المدرسين المخزنين في النظام
                        */
                        break;
                    case 8:
                        /* TODO
                          a) اطلب اسم وكنية المدرس
                          b) أعط معلومات المدرس أو رسالة خطأ حال عدم تواجده
                        */
                        break;
                    case 9:
                        // spaeter
                        break;
                    case 10:
                        /* TODO
                          a) اطلب اسم وكنية المدرس
                          b) احذف المدرس من النظام أو أعط رسالة خطأ حال عدم تواجده
                        */
                        break;
                    case 11:
                        /* TODO
                           a) اطلب معلومات الدرس من المستخدم
                           b) استخدم هذه المعلومات لإنشاء عنصر من صنف الدرس حال عدم تواجده
                        */
                        break;
                    case 12:
                        /* TODO
                           a) أعط رموز وأسماء جميع الدروس المخزنة على الشاشة
                        */
                        break;
                    case 13:
                        /* TODO
                          a) اطلب رمز الدرس
                          b) أعط معلومات الدرس أو رسالة خطأ حال عدم تواجده
                        */
                        break;
                    case 14:
                        // spaeter
                        break;
                    case 15:
                        /* TODO
                          a) اطلب رمز الدرس
                          b) احذف الدرس من النظام أو أعط رسالة خطأ حال عدم تواجده
                        */
                        break;
                }

           
        }

    }
    
}

 

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        
        Universitaet uni = new Universitaet();
        
        int operation = 0;

        while (operation != 16) {

                System.out.println("What Operation do you want to do?");
                System.out.println("1- add Student");
                System.out.println("2- view Students");
                System.out.println("3- search Student");
                System.out.println("4- edit Student info");
                System.out.println("5- delete Student");

                System.out.println("6- add a Lecturer");
                System.out.println("7- view the Lecturers ");
                System.out.println("8- search Lecturer");
                System.out.println("9- edit Lecturer info");
                System.out.println("10- delete Lecturer");

                System.out.println("11- add Lesson");
                System.out.println("12- view the Lessons");
                System.out.println("13- search Lesson");
                System.out.println("14- edit Lesson info");
                System.out.println("15- delete Lesson");
            
                System.out.println("16- register a Student to a Lesson");
                System.out.println("17- asseign Levturer to Lesson");
                System.out.println("18- view All the Lessons for a Student");
                System.out.println("19- view All the Lessons for a Lecturer");
                System.out.println("20- view All Students who registered to a Lesson ");
                System.out.println("21- view All Lecturers who assigned to a Lesson");

                System.out.println("22- End Programm");

                Scanner r = new Scanner(System.in);
                operation = r.nextInt();

                switch (operation) {
                    // old Operations + the new Operations from 16 to 21
                }

           
        }

    }
    
}

    package myproject; 

    import java.util.Scanner; 

    public class Main { 


        public static void main(String[] args) { 

            University uni = new University("tau", 1000);
            
            int operation = 0;

            Scanner r = new Scanner(System.in);

            while (operation != 6) {  

                System.out.println("What Operation do you want to do?");
                System.out.println("1- add Student");
                System.out.println("2- view Students");
                System.out.println("3- search Student");
                System.out.println("4- edit Student info");
                System.out.println("5- delete Student");
                
                operation = r.nextInt();

                switch (operation) {
                    case 1:
                           System.out.println("Enter the Name of Student:");
                           String a = r.next();
                           System.out.println("Enter the Surname of Student:");
                           String b = r.next();
                           System.out.println("Enter the Student Number:");
                           String c = r.next();
                           Student s1 = new Student(a,b,c);
                           uni.addstudent(s1);
                            break;
                    case 2:
                            uni.allStudents();
                            break;
                }
            }

        }}

  

    package myproject; 

    public class Student { 

        String name = ""; 

        String  surname = "";

        String student_number = ""; 


        public Student(String n, String p, String k) { 

            name = n;

            surname = p; 
            
            student_number = k; 

        } 

    }

  

    package myproject; 


    public class University { 


        private String name = ""; 

        private String adress = ""; 

        private Student[] my_students; 

        private int students_number = 0; 


        public University(String n, int s) { 

            name = n; 

            my_students = new Student[s]; 

        } 


        public void setAdress(String s) { 

            adress = s; 

        } 

        public String getName() { 

            return name; 

        } 


        void addstudent(Student p) { 

            my_students[students_number] = p; 

            students_number = students_number + 1; 

        } 


        public void allStudents() { 

            for (int i=0; i < students_number; i++) { 

                Student p = my_students[i]; 

                System.out.println(p.name + " " + p.surname + " " + p.student_number);


            } 

        } 

    } 

  

    package myproject; 

     

    import java.util.Scanner; 

     

    public class Main { 

     

         

        public static void main(String[] args) { 

           

            University uni = new University("tau");
            uni.setAdress("Beykoz");
            Scanner r = new Scanner(System.in);

            int operation = 1;

            while (operation != 3) {  

                System.out.println("What Operation do you want to do?");
                System.out.println("1- add Student");
                System.out.println("2- view Students");
                System.out.println("3- End Programm");
                
                operation = r.nextInt();

               if (operation == 1){
                           System.out.println("Enter the Name of Student:");
                           String a = r.next();
                           System.out.println("Enter the Surname of Student:");
                           String b = r.next();
                           System.out.println("Enter the Student Number:");
                           String c = r.next();
                           Student s1 = new Student(a,b,c);
                           if(uni.my_students.contains(s1) == false){
                               uni.my_students.add(s1);
                           }
                               
                           else{
                                   System.out.println("Student already exists");
                               }
                    }
                           
                else if(operation == 2){
                            uni.allStudents();
                     }
                    
                else{
                        System.out.println("Enter a valid operation number");
                    } 
                        
                }
            }

        }

  

    package myproject; 

     

    public class Student { 

        private String name = "unknown"; 

       private String  nachname = "unknown";

       private String student_number; 
        
       private String id = "111111111111";
        
        private int birthdate = 2000;
        
        private double average = 2.0;
        
        private int class = 1;
        
        private String telephon = "5555555555";
        
        private String email = "s@uni.edu";
        
        private String adress = "Global";
        

        public Student(String n, String p, String k) { 

            name = n;

            surname = p; 
            
            student_number = k; 

        } 
        
        public Student(String n, String p) { 

            name = n;
     
            
            student_number = p; 

        } 
        public Student(String n, int p, int k) { 

            student_number = n;

            birthdate = p; 
            
            class = k; 

        }
        @Override
        public String toString(){
            return student_number + ", " + name + " " + surname.toUpperCase();
        }

         public boolean equals(Object o) { 

            Student p = (Student) o; 

            if (student_number.equals(p.student_number)) { 

                return true; 

            } 

            return false;       

        } 

    }

  

    package myproject; 

     
    import java.util.Vector; 
    public class University { 

         

        private String name = "uni"; 

        private String adress = "Global"; 

        Vector my_students = new Vector();

        private int students_number = 1; 

     

        
        public University(String n) { 

            name = n; 

        } 

        public void setAdress(String s) { 

            adress = s; 

        } 

         

        public String getName() { 

            return name; 

        } 


         

        public void allStudents() { 
            students_number = my_students.size();

                System.out.println(my_students);


            } 

        } 
     

  

package myproject; 

 

import java.util.Scanner; 

 

public class Main { 

 

     

    public static void main(String[] args) { 

       

        University uni = new University("tau");
        uni.setAdresse("Beykoz");
        Scanner r = new Scanner(System.in);

        int operation = 0;

        while (operation != 16) {

                System.out.println("What Operation do you want to do?");
                System.out.println("1- add Student");
                System.out.println("2- view Students");
                System.out.println("3- search Student");
                System.out.println("4- edit Student info");
                System.out.println("5- delete Student");

                System.out.println("6- add a Lecturer");
                System.out.println("7- view the Lecturers ");
                System.out.println("8- search Lecturer");
                System.out.println("9- edit Lecturer info");
                System.out.println("10- delete Lecturer");

                System.out.println("11- add Lesson");
                System.out.println("12- view the Lessons");
                System.out.println("13- search Lesson");
                System.out.println("14- edit Lesson info");
                System.out.println("15- delete Lesson");
            
                System.out.println("16- End Programm");
            
            operation = r.nextInt();

           switch (operation){
               case 1:
                       System.out.println("Enter the Name:");
                       String a = r.next();
                       System.out.println("Enter the Surname:");
                       String b = r.next();
                       System.out.println("Enter the Student Number:");
                       String c = r.next();
                       if (Student.test(c)){
                           System.out.println("the Student Number is not valid");
                           break;
                       }
                       Student s1 = new Student(a,b,c);
                       if(uni.my_students.contains(s1) == false){
                           uni.my_students.add(s1);
                           break;
                       }
                           
                       else{
                               System.out.println("Student already exist");
                               break;
                           }
                
                       
           case 2:
                        uni.allStudents();
                        break;
                
           case 3:
                System.out.println("Enter the Student Number");
                  
                    String u = r.next();
               
                    Student s2 = new Student(u);
                    uni.search(s2);
                    break;
           case 4:
               //later
               break;
           case 5:
                System.out.println("Enter the Student Number");
               String u1 = r.next();
               Student s3 = new Student(u1);
                    uni.delete(s3);
                    break;
           case 6:
                       System.out.println("Enter the Name:");
                       String a2 = r.next();
                       System.out.println("Enter the Surname:");
                       String b2 = r.next();
                       Lecturer d1 = new Lecturer(a2,b2);
                       if(uni.my_lecturers.contains(d1) == false){
                           uni.my_lecturers.add(d1);
                           break;
                       }
                           
                       else{
                               System.out.println("Lecturer already exist");
                               break;
                           }
           case 7:
               uni.allLecturers();
                        break;
           case 8:
               System.out.println("Enter the Name:");
               String u2 = r.next();
               System.out.println("Enter the Surname:");
               String u3 = r.next();
                    Lecturer d2 = new Lecturer(u2,u3);
                    uni.searchD(d2);
                    break;
           case 9:
               //later
               break;
           case 10:
               System.out.println("Enter the Name:");
                  
                    String u4 = r.next();
               System.out.println("Enter the Surname:");
               String u5 = r.next();
               Lecturer d3 = new Lecturer(u4,u5);
                    uni.deleteD(d3);
                    break;
           case 11:
                  System.out.println("Enter the Code of the Lesson:");
                       String l = r.next();
                       System.out.println("Enter the Name of the Lesson:");
                       String l1 = r.next();
                       Lesson l3 = new Lesson(l,l1);
                       if(uni.lesson.contains(l3) == false){
                           uni.lesson.add(l3);
                           break;
                       }   
                       else{
                               System.out.println("Lesson already exist");
                               break;
                           }
           case 12:
               uni.allLessons();
                        break;
           case 13:
               System.out.println("Enter the Code of the Lesson:");
                  
                    String l4 = r.next();
      
 
               LVA l5 = new Lesson(l4);
                    uni.searchL(l5);
                    break;
           case 14:
               //later
               break;
           case 15:
                System.out.println("Enter the Code of the Lesson:");
                  
                    String l6 = r.next();
          
               Lesson l7 = new Lesson(l6);
                    uni.deleteL(l7);
                    break;
            }
           
                
        }

   

    }}

package myproject; 

 

public class Student extends Person { 

    

    private String student_number; 
    
    private double average = 2.0;
    
    private int class_num = 1;
    
   
    

    public Student(String n, String p, String k) { 

        name = n;

        surname = p; 
        
        student_number = k; 

    } 
    
    public Student(String n, String p) { 

        name = n;
 
        
        student_number = p; 

    } 
    public Student(String n, int p, int k) { 

        student_number = n;

        birthdate = p; 
        
        class_num = k; 

    }
    public Student(String m){
       
        student_number = m;
       
    }
    @Override
    public String toString(){
        return student_number + ", " + name + " " + surname.toUpperCase();
    }

     public boolean equals(Object o) { 

        Student p = (Student) o; 

        if (student_number.equals(p.student_number)) { 

            return true; 

        } 

        return false;       

    } 

  public static boolean test(String c){
      boolean numeric = false;
                    try{
                       int k = Integer.valueOf(c);
                    }
                    catch(java.lang.NumberFormatException e){
                        
                        numeric = true;
                    }
                    if (c.startsWith("0") || c.length()!=7 || numeric){
                        return true;
                    }
                    else{
                        return false;
                    }
  }


}

package myproject; 

 
import java.util.Vector; 
public class University { 

     

    private String name = "uni"; 

    private String adress = "Global"; 

    Vector<Student> my_students = new Vector();
    Vector<Lecturer> my_lecturers = new Vector();
    Vector<Lecture> lecture = new Vector();
    private int studetns_number = 1; 

 

    
    public University(String n) { 

        name = n; 

    } 
  

    public void setAdress(String s) { 

        adress = s; 

    } 
  

    public String getName() { 

        return name; 

    } 


    public void allStudents() { 
            if (my_students.size() == 0){
                System.out.println("There's no students till now");
            }
            else{
                for (int i = 0; i < my_students.size(); i ++){
                Student s = (Student) my_students.get(i);
                System.out.println(s);
        }}


        }
     public void allLecturers() { 
            if (my_lecturers.size() == 0){
                System.out.println("There's no lecturers till now");
            }else{
            for (int i = 0; i < my_lecturers.size(); i ++){
            Lecturer s = (Lecturer) my_lecturers.get(i);
            System.out.println(s);
        }}


        }
      public void allLectures() { 
            if (lecture.size() == 0){
                System.out.println("There's no lectures till now");
            }
            else{
              for (int i = 0; i < lecture.size(); i++){
              Lecture s = (Lecture) lecture.get(i);
              System.out.println(s);
        }}


        }
    public void search(Student s1){
        if (my_students.contains(s1)) {
            
            int e = my_students.indexOf(s1);
            System.out.println("Student exists, his Informations are: ");
            System.out.println(my_students.elementAt(e));
           
        }else{
            System.out.println("Student not found");
        }

    }
    public void searchD(Lecturer s1){
        if (my_lecturers.contains(s1)) {
            
            int e = my_lecturers.indexOf(s1);
            System.out.println("Lecturer exists, his Informations are:");
            System.out.println(my_lecturers.elementAt(e));
           
        }else{
            System.out.println("Lecturer not found");
        }

    }
     public void searchL(Lecture s1){
        if (lecture.contains(s1)) {
            
            int e = lecture.indexOf(s1);
            System.out.println("Lecture exists, its Informations are:");
            System.out.println(lecture.elementAt(e));
           
        }else{
            System.out.println("Lecture not found");
        }

    }
    public void delete(Student s1){
        if (my_students.contains(s1)) {
            
            int e = my_students.indexOf(s1);
            System.out.println("Student will be deleted..");
            my_students.remove(e);
           
        }else{
            System.out.println("Student not found");
        }

    }
 public void deleteD(Lecturer s1){
        if (my_lecturers.contains(s1)) {
            
            int e = my_lecturers.indexOf(s1);
            System.out.println("Lecturer will be deleted..");
            my_lecturers.remove(e);
           
        }else{
            System.out.println("Lecturer not found");
        }

    }
  public void deleteL(Lecture s1){
        if (lecture.contains(s1)) {
            
            int e = lecture.indexOf(s1);
            System.out.println("Lecture will be deleted..");
            lecture.remove(e);
           
        }else{
            System.out.println("Lecture not found");
        }

    }
    } 
 

package myproject;

/**
 *
 * @author mulham.github.io
 */
public class Person {
    protected String name = "unknown"; 

    protected String  surname = "unkown";
    
    protected String id = "111111111111";
    
    protected int birthdate = 2000;
    
    protected String telephon = "5555555555";
    
    protected String email = "s@uni.edu";
    
    protected String adress = "Global";
}

package myproject;

/**
 *
 * @author mulham.github.io
 */
public class Lecture {
    private String Code;
    private String Name;
    
    public Lecture(String a, String b){
         Code = a;
         Name = b;
    }
    public Lecture(String a){
         Code = a;
    }
    
      @Override
    public String toString(){
        return Code.toUpperCase() + " " + Name;
    }

     public boolean equals(Object o) { 

        Lecture p = (Lecture) o; 

        if (Code.equals(p.Code)) { 

            return true; 

        } 

        return false;       

    } 
}

package myproject;

/**
 *
 * @author mulham.github.io
 */
public class Lecturer extends Person {
    public Lecturer(String n, String p) { 

        name = n;

        surname = p; 
        

    } 
    public Lecturer(String n) { 

        name = n;

    

    }
     @Override
    public String toString(){
        return name + " " + surname.toUpperCase();
    }

     public boolean equals(Object o) { 

        Lecturer p = (Lecturer) o; 

        if (name.equals(p.name)) { 

            return true; 

        } 

        return false;       

    } 
}