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what i can use in netbeans java code , to save output and use it again for same code ,example : this is my output when I run my program it will not display any book, faculty or student if I didn't add them by user enter so I need to save when I add book or faculty or student , not every time need to enter again to display them

---------Please choose one of below Options----------
1. Add Student
2. Add Faculty
3. Add Book
4. Display All Students
5. Display All Faculty
6. Display All Books
7. Search Student
8. Search Faculty
9. Search Book
10. Borow Book
11. Display All Borow Book
12. Return Book
13. Exit
your choice: 6

What I have tried:

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package library;

/**
 *
 * @author maryam
 */
import java.io.FileInputStream;
import java.util.Scanner;
import java.util.ArrayList;


public class LibraryDriver {
  

    public static ArrayList<Student> studentList = new ArrayList<Student>();
    public static ArrayList<Faculty> FacultyList = new ArrayList<Faculty>();
    public static ArrayList<Book> bookList = new ArrayList<Book>();
    public static ArrayList<Book> borroeList = new ArrayList<Book>();
    
    public static void main(String[] args) {
         Scanner br = new Scanner(System.in);
        int reapeat = 13;
        while (reapeat > 0) {
            System.out.println("------------------------------------------------------");
            System.out.println("-------WELCOME TO OUR LIBRARY MANAGEMENT SYSTEM-------");
            System.out.println("------------------------------------------------------");
            System.out.println("----------Please choose one of below Options----------");
            System.out.println("1. Add Student");
            System.out.println("2. Add Faculty");
            System.out.println("3. Add Book");
            System.out.println("4. Display All Students");
            System.out.println("5. Display All Faculty");
            System.out.println("6. Display All Books");
            System.out.println("7. Search Student");
            System.out.println("8. Search Faculty");
            System.out.println("9. Search Book");
            System.out.println("10. Borow Book");
            System.out.println("11. Display All Borow Book");
            System.out.println("12. Return Book");
            System.out.println("13. Exit");
            System.out.print("your choice: ");
            int option = br.nextInt();
            System.out.println("------------------------------------------------------");
            switch (option) {
                case 1:
                    System.out.println("Enter Student Id");
                     int id = br.nextInt();
                    boolean chekId = checkStudentId(id);
                    if (chekId) {
                        System.out.println("StudentId Already Exist");
                        break;
                    }
                    br.nextLine();
                    System.out.println("Enter Student FirstName");
                    String surname = br.nextLine();
                    System.out.println("Enter Student lastName");
                    String lastName = br.nextLine();
                    System.out.println("Enter Student Age");
                    int age = br.nextInt();
                    Student student = new Student(id, surname, lastName, age);
                    studentList.add(student);
                    break;
                case 2:
                    System.out.println("Enter Faculty Id");
                    int id1 = br.nextInt();
                    boolean chekId1 = checkFacultyId(id1);
                    if (chekId1) {
                        System.out.println("FacultyId Already Exist");
                        break;
                    }
                    br.nextLine();
                    System.out.println("Enter Faculty FirstName");
                    String surname1 = br.nextLine();
                    System.out.println("Enter Faculty lastName");
                    String lastName1 = br.nextLine();
                    System.out.println("Enter Faculty Age");
                    int age1 = br.nextInt();
                    Faculty Faculty = new Faculty(id1, surname1, lastName1, age1);
                    FacultyList.add(Faculty);
                    break;
                case 3:
                    System.out.println("Enter Book Id :");
                    int bookId = br.nextInt();
                    boolean chekBookId = checkBookId(bookId);
                    if (chekBookId) {
                        System.out.println("Book Id Already Exist");
                        break;
                    }
                    br.nextLine();
                    System.out.println("Enter Book tittle");
                    String tittle = br.nextLine();
                    System.out.println("Enter author FirstName");
                    String authorSurname = br.nextLine();
                    System.out.println("Enter author lastName");
                    String authorName = br.nextLine();
                    System.out.println("Enter Book Purchase Date");
                    String purchaseDate = br.nextLine();
                    System.out.println("Enter Book Availability :");
                    String status = br.nextLine();
                    Book b = new Book(bookId, tittle, authorSurname, authorName, purchaseDate, status) {
                    }; // to implement all abrstract method
                    bookList.add(b);
                    break;
                case 4:
                    displayAllStudent();
                    break;
                case 5:
                    displayAllFaculty();
                    break;
                case 6:
                    displayAllBook();
                    break;
                case 7:
                    System.out.println("Please Enter student Id, you want to Search");
                    int searchStudentId = br.nextInt();
                    searchStudent(searchStudentId);
                    break;
                case 8:
                    System.out.println("Please Enter Faculty Id, you want to Search");
                    int searchFacultyId = br.nextInt();
                    searchFaculty(searchFacultyId);
                    break;
                case 9:
                    System.out.println("Please Enter Book Id, you want to Search");
                    int searchBookId = br.nextInt();
                    searchBook(searchBookId);
                    break;
                case 10:
                    borrowBook();
                    break;
                case 11:
                    DisplayborrowBook();
                    break;
                case 12:
                    returnBook();
                    break;
                case 13:
                    reapeat = -13;
                    break;
            }
        }
    }

    public static void returnBook() {
        Scanner br = new Scanner(System.in);
        try {
            System.out.println("---------------------");
            System.out.println("Please enter Student/Faculty Id:");
            int id = br.nextInt();
            System.out.println("Please enter Book Id:");
            int bookId = br.nextInt();
            for (int i = 0; i < borroeList.size(); i++) {
                if (borroeList.get(i).getBookId() == bookId) {

                    borroeList.get(i).setStatus("AVAILABLE");
                    borroeList.remove(i);// to delete an element from an ArrayList
                    break;
                }
            }

        } catch (NumberFormatException e) {
            System.err.println("error. " + e);
        }
    }

    public static void DisplayborrowBook() {
        for (Book book : borroeList) {
            System.out.println("Book Id:  " + book.getBookId() + " Tittle: " + book.getTittle() + " Auhtor Surname: " + book.getAuthorSurname()
                    + " Author FirstName: " + book.getAuthorFirsName() + " Purchase Date: " + book.getPurchaseDate() + " staus: " + book.getStatus());
        }
    }

    public static void borrowBook() {
        Scanner br = new Scanner(System.in);
        System.out.println("----List of all Available book as Below----");
        for (Book book : bookList) {
            if (book.getStatus().equalsIgnoreCase("AVAILABLE")) {
                System.out.println("Book Id: " + book.getBookId() + " Tittle: " + book.getTittle() + " Auhtor Surname: " + book.getAuthorSurname()
                        + " Author FirstName: " + book.getAuthorFirsName() + " Purchase Date: " + book.getPurchaseDate() + " staus: " + book.getStatus());
            }
        }
        System.out.println("---------------------");
        System.out.println("Please enter Student/Faculty Id:");
        int id = br.nextInt();
        System.out.println("Please enter Book Id:");
        int bookId = br.nextInt();
        for (Book book : bookList) {
            if (book.getBookId() == bookId) {
                borroeList.add(book);
                book.setStatus("Not AVAILABLE");
            }
        }
    }

    public static void searchBook(int searchBookId) {
        boolean search = true;
        for (Book book : bookList) {
            if (book.getBookId() == searchBookId) {
                System.out.println("Book Id: " + book.getBookId() + " Tittle : " + book.getTittle() + " Auhtor Surname: " + book.getAuthorSurname()
                        + " Author FirstName: " + book.getAuthorFirsName() + " Purchase Date: " + book.getPurchaseDate() + " staus: " + book.getStatus());
                search = false;
            }
        }
        if (search) {
            System.out.println(searchBookId + " Not exist");
        }
    }

    public static void searchStudent(int searchStudentId) {
        boolean search = true;
        for (Student st : studentList) {
            if (st.getStudentId() == searchStudentId) {
                System.out.println("Student Id: " + st.getStudentId() + " FirstName: " + st.getSurname() + " lastName: " + st.getLastName()
                        + " Age: " + st.getAge());
                search = false;
            }
        }
        if (search) {
            System.out.println(searchStudentId + " Not exist");
        }
    }

    public static void displayAllBook() {
        for (Book book : bookList) {
            System.out.println("Book Id: " + book.getBookId() + " Tittle: " + book.getTittle() + " Auhtor Surname: " + book.getAuthorSurname()
                    + " Author FirstName: " + book.getAuthorFirsName() + " Purchase Date: " + book.getPurchaseDate() + " staus: " + book.getStatus());
        }
    }

    public static void displayAllStudent() {
        for (Student st : studentList) {
            System.out.println("Student Id: " + st.getStudentId() + " FirstName: " + st.getSurname() + " lastName: " + st.getLastName()
                    + " Age: " + st.getAge());
        }
    }

   public static boolean checkBookId(int bookId) {
        for (Book book : bookList) {
            if (book.getBookId() == bookId) {
                return true;
            }
        }
        return false;
    }

    public static boolean checkStudentId(int id) {
        for (Student st : studentList) {
            if (st.getStudentId() == id) {
                return true;
            }
        }
        return false;
    }

    public static boolean checkFacultyId(int id) {
        for (Faculty st : FacultyList) {
            if (st.getFacultyId() == id) {
                return true;
            }
        }
        return false;
    }

    public static void displayAllFaculty() {
        for (Faculty st : FacultyList) {
            System.out.println("Faculty Id: " + st.getFacultyId() + " FirstName: " + st.getSurname() + " lastName: " + st.getLastName()
                    + " Age: " + st.getAge());
        }
    }

   public static void searchFaculty(int searchFacultyId) {
        boolean search = true;
        for (Faculty st : FacultyList) {
            if (st.getFacultyId() == searchFacultyId) {
                System.out.println("Faculty Id: " + st.getFacultyId() + " FirstName: " + st.getSurname() + " lastName: " + st.getLastName()
                        + " Age: " + st.getAge());
                search = false;
            }
        }
        if (search) {
            System.out.println(searchFacultyId + " Not exist");
        }
    }
}
Posted
Comments
Gerry Schmitz 29-Apr-21 19:08pm
   
You need to serialize and deserializee your lists; individually or as a group (as a class).

https://www.geeksforgeeks.org/serialization-in-java/
Member 14999822 29-Apr-21 19:37pm
   
i can't use anything esay than this?
Richard MacCutchan 30-Apr-21 3:53am
   
Write the information to a text file.

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