ADF2 ArrayList Serializable java...2

Example: ArrayList , Scanner, Serializable, Exception , Loop java

Student Management
-Comparator
-ArrayList
-Scanner
-Serializable
-File

MainPage.xaml

Windows Store 2017

package javaapplication2;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Scanner;
import java.util.logging.Level;
import java.util.logging.Logger;

public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        Scanner sc = new Scanner(System.in);
        StudentConsole cs = new StudentConsole();
        int choice = 0;
        do {
            cs.Menu();
            System.out.println("Enter Your Choice :");
            choice = sc.nextInt();
            sc.nextLine();
            switch (choice) {
                case 1:
                    cs.AddStudent();
                    break;
                case 2:
                    cs.Modify();
                    break;
                case 3:
                    cs.Display();
                    break;
                case 4:
                    System.exit(0);
                default:
                    System.out.println("Choice from 1 - 4");
            }
        } while (choice != 5);
    }

}

class Student implements Serializable {

    private String id;
    private String name;
    private String address;
    private String phone;

    public Student() {
    }

    public Student(String id, String name, String address, String phone) {
        this.id = id;
        this.name = name;
        this.address = address;
        this.phone = phone;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    @Override
    public String toString() {
        return id + "" + name + "" + address + "" + phone;
    }

}

class StudentConsole {

    Student std = null;
    StudentList test = null;
    Scanner sc = null;

    public StudentConsole() {
        std = new Student();
        test = new StudentList();
        sc = new Scanner(System.in);
    }
    //add student

    public void AddStudent() {
        String answer = "";
        do {
            System.out.println("Enter Student ID :");
            String id = sc.nextLine();
            std = test.FindByID(id);
            if (std != null) {
                System.out.println("Student ID Exist !");
            } else {
                System.out.println("Enter Student Name :");
                String name = sc.nextLine();
                System.out.println("Enter Student Address :");
                String address = sc.nextLine();
                System.out.println("Enter Student Phone :");
                String phone = sc.nextLine();
                std = new Student(id, name, address, phone);
                test.Add(std);
                test.Save();
                System.out.println("Continue [Y/N] ?");
                answer = sc.nextLine();
            }
        } while (answer.equalsIgnoreCase("y"));
    }

    //Modify Student
    public void Modify() {
        System.out.println("Modification is not allowed ");
    }

    //Display
    public void Display() {
        test.Load();
        Student[] arr = test.showAll();
        System.out.printf("%-15s\t%-15s\t%-15s\t%-15s\n", "ID", "Name", "Address", "Phone");
        for (int i = 0; i < arr.length; i++) {
            System.out.printf("%-15s\t%-15s\t%-15s\t%-15s\n", arr[i].getId(), arr[i].getName(), arr[i].getAddress(), arr[i].getPhone());
        }
    }

    //menu
    public void Menu() {
        System.out.println("------------------");
        System.out.println("1. Add Student ");
        System.out.println("2. Modify Student ");
        System.out.println("3. Display Student Record ");
        System.out.println("4.Exit");
        System.out.println("------------------");
    }
}

class StudentList {

    ArrayList<Student> list = null;
    Student std = null;

    public StudentList() {
        list = new ArrayList<Student>();
        std = new Student();
    }
    //add Student

    public void Add(Student st) {
        if (st != null) {
            list.add(st);
        }
    }
    //find by ID

    public Student FindByID(String id) {
        if (id != null) {
            for (int i = 0; i < list.size(); i++) {
                if (id.equalsIgnoreCase(list.get(i).getId())) {
                    return list.get(i);
                }
            }
        }
        return null;
    }
    //show all

    public Student[] showAll() {
        return list.toArray(new Student[list.size()]);
    }
    //save

    public void Save() {
        String filename = "student.dat";
        try {
            ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(filename));
            int count = list.size();
            out.writeInt(count);
            out.writeObject(list);
            out.flush();
            out.close();
        } catch (IOException ex) {
            Logger.getLogger(StudentList.class.getName()).log(Level.SEVERE, null, ex);
        }

    }
    //load

    public void Load() {
        ObjectInputStream ois = null;
        try {
            String filename = "student.dat";
            ois = new ObjectInputStream(new FileInputStream(filename));
            int count = list.size();
            count = ois.readInt();
            try {
                list = (ArrayList<Student>) ois.readObject();
            } catch (ClassNotFoundException ex) {
                Logger.getLogger(StudentList.class.getName()).log(Level.SEVERE, null, ex);
            }
        } catch (IOException ex) {
            Logger.getLogger(StudentList.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            try {
                ois.close();
            } catch (IOException ex) {
                Logger.getLogger(StudentList.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
    }
}