import javax.swing.*;


class LibraryMain {
    // Creates a staff of employees
    public static void main(String[] args) {
        // Sets up the list of books.
        Books[] BookList;

        BookList = new Books[5];
        BookList[0] = new Books("Title1", "Author1", "Book1");
        BookList[1] = new Books("Title2", "Author2", "Book2");
        BookList[2] = new Books("Title3", "Author3", "Book3");
        BookList[3] = new Books("Title4", "Author4", "Book4");
        BookList[4] = new Books("Title5", "Author5", "Book5");
   	
        // creates object to print out details
        Borrowers personnel = new Borrowers();

        personnel.records();
        System.exit(0); // exits
    }
    
}


class Borrowers {
  
    public Students[] BorrowersList;
    public Borrowers() {
        // Sets up the list of borrowers.
        BorrowersList = new Students[4];
        BorrowersList[0] = new Students("Student1", "S1", "", "");
        BorrowersList[1] = new Students("Student2", "S2", "Book1", "");
        BorrowersList[2] = new Students("Student3", "L3", "Book5", "");
        BorrowersList[3] = new Students("Student4", "L4", "Book3", "Book5");
         
        for (int count = 0; count < 1; count++) { // loop to continue to enter books
            // gets student ID
            String num = JOptionPane.showInputDialog(null,
                    "Enter the Student ID", "Library System",
                    JOptionPane.QUESTION_MESSAGE);
			      
            // gets bookid
            String num2 = JOptionPane.showInputDialog(null, "Enter the Book ID",
                    "Library System", JOptionPane.QUESTION_MESSAGE);
                    
            System.out.println("\n");

            // finds if any one has that book
            boolean is_available = true;

            for (int count2 = 0; count2 < 4; count2++) {
                if (BorrowersList[count2].bookid1.equals(num2)) {
                    System.out.println("Sorry, the book is not available...");
                    is_available = false;
                    break;
                }
            }
            
            for (int count3 = 0; count3 < 4; count3++) {
                    if ((is_available == true)
                            && (BorrowersList[count3].ID.equals(num))) {
                        BorrowersList[count3].bookid1 = num2;
                        break;
                    }
                }
            }
			 
    }
			
    public void records() {
        // prints out borrowers details
        for (int count = 0; count < BorrowersList.length; count++) {
            System.out.println(BorrowersList[count]);
            System.out.println("-----------------------------------");
        }
    }
}


class Students {
    protected String name;
    protected String ID;
    protected String bookid1;
    protected String bookid2;

    // Sets up students with the information.
    public Students(String sName, String sID, String sBookid1, String sBookid2) {
        name = sName;
        ID = sID;
        bookid1 = sBookid1;
        bookid2 = sBookid2;
   
    }

    // Returns information about the students as a string.
    public String toString() {
        String result = "Name           : " + name + "\n";

        result += "ID             : " + ID + "\n";
        result += "Books borrowed : " + bookid1 + " " + bookid2;
     
        return result;
    }
   
}


class Books {
    protected String title;
    protected String author;
    protected String ISBN;
    // Sets up books with the information.
    public Books(String sName, String sID, String sBookid) {
        title = sName;
        author = sID;
        ISBN = sBookid;
    }
   
}