#DataManager.java

/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
 */
package com.gokisoft.java2.lesson08;

import java.util.ArrayList;
import java.util.List;

/***
* DataManager -> Chi can tao 1 object tu Class Object DataManager
* Neu tao nhieu hon 1 -> Sai nghiep vu du an.
* Lam sao -> Chi cho phep tao duy nhat 1 object tu DataManager
*/
public class DataManager {
    List<Main.Student> studentList;
    static DataManager instance = null;
    
    private DataManager() {
        studentList = new ArrayList<>();
    }

    public synchronized static DataManager getInstance() {
        if(instance == null) {
            instance = new DataManager();
        }
        return instance;
    }
    
    public List<Main.Student> getStudentList() {
        return studentList;
    }

    public void setStudentList(List<Main.Student> studentList) {
        this.studentList = studentList;
    }
}

#globals.properties

# Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
# Click nbfs://nbhost/SystemFileSystem/Templates/Other/properties.properties to edit this template

test_option1 = 1. Input student's information
test_option2 = 2. Display student's information
test_option3 = 3. Search
test_option4 = 4. Sort by name
test_option5 = 5. Exit
test_option6 = Choose: 
test_continue = Continue...

#globals_vi_VN.properties

# Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
# Click nbfs://nbhost/SystemFileSystem/Templates/Other/properties.properties to edit this template

test_option1 = 1. Nhap thong tin sinh vien
test_option2 = 2. Hien thi thong tin sinh vien
test_option3 = 3. Tim kiem
test_option4 = 4. Sap xep
test_option5 = 5. Thoat
test_option6 = Chon: 
test_continue = Ti\u1ebfp t\u1ee5c...

#Main.java

/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
 */
package com.gokisoft.java2.lesson08;

import java.util.ArrayList;
import java.util.List;

/**
 *
 * @author teacher
 */
public class Main {
    static class Student {
        String fullname;
        String email;

        public Student() {
        }

        public Student(String fullname, String email) {
            this.fullname = fullname;
            this.email = email;
        }

        public String getFullname() {
            return fullname;
        }

        public void setFullname(String fullname) {
            this.fullname = fullname;
        }

        public String getEmail() {
            return email;
        }

        public void setEmail(String email) {
            this.email = email;
        }

        @Override
        public String toString() {
            return "fullname=" + fullname + ", email=" + email;
        }
    }
    
    public static void main(String[] args) {
        Student std = new Student();
        Student std2 = new Student();
        
        System.out.println(std);
        System.out.println(std2);
        
//        DataManager dm1 = new DataManager();
//        DataManager dm2 = new DataManager();
        DataManager dm1 = DataManager.getInstance();
        dm1.getStudentList().add(new Student());
        
        DataManager dm2 = DataManager.getInstance();
        dm2.getStudentList().add(new Student());
        
        System.out.println(dm1.getStudentList().size());
        System.out.println(dm2.getStudentList().size());
        
    }
}

#Test.java

/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
 */
package com.gokisoft.java2.lesson08;

import java.util.Locale;
import java.util.ResourceBundle;
import java.util.Scanner;

/**
 *
 * @author teacher
 */
public class Test {
    public static void main(String[] args) {
        Locale locale = new Locale("vi", "VN");
        ResourceBundle bundle = ResourceBundle.getBundle("resources/globals", locale);
        
        Scanner scan = new Scanner(System.in);
        int choose;
        
        do {            
            showMenu();
            choose = Integer.parseInt(scan.nextLine());
            
            System.out.println(bundle.getString("test_continue"));
        } while (choose != 5);
    }
    
    static void showMenu() {
        Locale locale = new Locale("vi", "VN");
        ResourceBundle bundle = ResourceBundle.getBundle("resources/globals", locale);
        
        System.out.println(bundle.getString("test_option1"));
        System.out.println(bundle.getString("test_option2"));
        System.out.println(bundle.getString("test_option3"));
        System.out.println(bundle.getString("test_option4"));
        System.out.println(bundle.getString("test_option5"));
        System.out.println(bundle.getString("test_option6"));
    }
}