public class Book 
{
    String bookName,author;
    int bookId,noOfCopies;
    public String getBookName() {
        return bookName;
    }
    public void setBookName(String bookName) {
        this.bookName = bookName;
    }
    public String getAuthor() {
        return author;
    }
    public void setAuthor(String author) {
        this.author = author;
    }
    public int getBookId() {
        return bookId;
    }
    public void setBookId(int bookId) {
        this.bookId = bookId;
    }
    public int getNoOfCopies() {
        return noOfCopies;
    }
    public void setNoOfCopies(int noOfCopies) {
        this.noOfCopies = noOfCopies;
    }

}


import java.util.Scanner;


public class Library 
{
    public static void main(String args[])
    {
        LibraryImpl l1= new LibraryImpl();
        int ch=0;
        do
        {

            System.out.println("Menu");
            System.out.println("1.Add Books");
            System.out.println("2.Add Student");
            System.out.println("3.issue books");
            System.out.println("4.return books");
            System.out.println("5.search book");
            System.out.println("Enter ur choice");
            Scanner s=new Scanner(System.in);
            ch=s.nextInt();
            switch(ch)
            {
            case 1:
                l1.addbooks();
                break;
            case 2:
                l1.addstudent();
                break;
            case 3:
                l1.issuebooks();
                break;
            case 4:
                l1.returnbooks();
                break;
            case 5:
                l1.searchbooks();
                break;
                default:
                    System.out.println("wrong choice");

            }

        }while((ch>0) && (ch<6));
    }

}

import java.util.ArrayList;
import java.util.Scanner;


public class LibraryImpl
{
    ArrayList<Book> bookList=new ArrayList<Book>();
    ArrayList<Student> stuList=new ArrayList<Student>();

    int[] arr=new int[5];
    public void addbooks()
    {
        Book b1=new Book();
        System.out.println("Enter the name of the book");
        Scanner s1=new Scanner(System.in);
        String name=s1.nextLine();
        b1.setBookName(name);
        System.out.println("Enter book id");
        int id=s1.nextInt();
        b1.setBookId(id);
        System.out.println("enter author");
        String author=s1.next();
        b1.setAuthor(author);
        System.out.println("enter no of copies");
        int copies=s1.nextInt();
        b1.setNoOfCopies(copies);
        bookList.add(b1);

    }

    public void addstudent()
    {
        Student s1=new Student();
        System.out.println("Enter the name ");
        Scanner sc1=new Scanner(System.in);
        String name=sc1.nextLine();
        s1.setSname(name);
        System.out.println("Enter student id");
        int id=sc1.nextInt();
        s1.setSid(id);
        System.out.println("enter no of copies");
        int copies=sc1.nextInt();
        s1.setNoc(copies);
        stuList.add(s1);

    }


    public void issuebooks()
    {   

        System.out.println("Enter book id");    
        Scanner sc=new Scanner(System.in);
        int id=sc.nextInt();
        for(Book b:bookList)
        {
            if(b.getBookId()==id)
            {
                if(b.getNoOfCopies()== 0)
                    System.out.println("Book not available");
                else
                    checkStud(b);
            }
        }
    }

    public void checkStud(Book obj)
    {
        System.out.println("Enter student id");     
        Scanner sc=new Scanner(System.in);
        int sid=sc.nextInt();
        for(Student stud:stuList)
        {
            if(stud.getSid()==sid)
            {
                if(stud.getNoc()<5)
                {
                    System.out.println("Book Issued");
                    stud.setNoc(stud.getNoc()+1);
                    obj.setNoOfCopies(obj.getNoOfCopies()-1);
                }
                else
                    System.out.println("Only 5 books can be issued");
            }
        }
    }

    public void returnbooks()
    {   

        System.out.println("Enter book id");    
        Scanner sc=new Scanner(System.in);
        int id=sc.nextInt();
        for(Book b:bookList)
        {
            if(b.getBookId()==id)
            {
                b.setNoOfCopies(b.getNoOfCopies()+1);
                    callStud();
            }
        }
    }
    public void callStud()
    {
        System.out.println("Enter student id");     
        Scanner sc=new Scanner(System.in);
        int sid=sc.nextInt();
        for(Student stud:stuList)
        {
            if(stud.getSid()==sid)
            {

                    System.out.println("Book Returned");
                    stud.setNoc(stud.getNoc()-1);

                }
                else
                    System.out.println("Invalid user");
            }
        }

    public void searchbooks()
    {
        System.out.println("Enter the name of the book");
        Scanner sc=new Scanner(System.in);
        String name=sc.next();
        for(Book b:bookList)
        {
            if(b.getBookName().equalsIgnoreCase(name))
            {
                System.out.println("The details are:"+b.getBookName()+" "+b.getAuthor()+" "+b.getNoOfCopies());
            }

        }

    }
}

public class Student
{
    String sname;
    int sid,noc;
    public String getSname() {
        return sname;
    }
    public void setSname(String sname) {
        this.sname = sname;
    }
    public int getSid() {
        return sid;
    }
    public void setSid(int sid) {
        this.sid = sid;
    }
    public int getNoc() {
        return noc;
    }
    public void setNoc(int noc) {
        this.noc = noc;
    }


}