Design Library Management System?

Solution:

The basic components of the library are: library items and mechanism for giving books to users.Please find the implementation below.

Implementation:

import java.util.HashMap;
import java.util.Map;

/**
 *
 */

/**
 * @author Abhinaw.Tripathi
 *
 */

class Book
{
  private String thAuthor,theTitle,pageCount,year,edition;

  public Book(String author,String title,String pages,String yearPublished,String bookEdition)
  {
this.edition=bookEdition;
this.thAuthor=author;
this.pageCount=pages;
this.theTitle=title;
this.year=yearPublished;
  }

public String getThAuthor() {
return thAuthor;
}
public void setThAuthor(String thAuthor) {
this.thAuthor = thAuthor;
}
public String getTheTitle() {
return theTitle;
}
public void setTheTitle(String theTitle) {
this.theTitle = theTitle;
}
public String getPageCount() {
return pageCount;
}
public void setPageCount(String pageCount) {
this.pageCount = pageCount;
}
public String getYear() {
return year;
}
public void setYear(String year) {
this.year = year;
}
public String getEdition() {
return edition;
}

}

interface LibraryItem
{
  public String getID();
  public boolean checkOut(String holder);
  public String getHolder();
}

class LibraryBook extends Book implements LibraryItem
{
private String theID;
private String theHolder;

public LibraryBook(String author, String title, String pages,String yearPublished, String                  bookEdition,String id)
{
super(author, title, pages, yearPublished, bookEdition);
theID=id;
}

@Override
public String getID()
{
// TODO Auto-generated method stub
return null;
}

@Override
public boolean checkOut(String holder)
{
// TODO Auto-generated method stub

if(theHolder == null)
{
theHolder=holder;
return true;
}
return false;
}

@Override
public String getHolder() {
// TODO Auto-generated method stub
return theHolder;
}

}

class Library
{
  private Map items;

  public Library()
  {
items=new HashMap();
  }

  public void add(LibraryItem theItem)
  {
 items.put(theItem.getID(), theItem);
  }

  public void checkout(String id,String holder)
  {
 LibraryItem item=(LibraryItem)items.get(id);
 item.checkOut(holder);
  }

  public String getHolder(String id)
  {
 LibraryItem item=(LibraryItem)items.get(id);
 return item.getHolder();
  }

}


public class LibraryManagementTest {

/**
*
*/
public LibraryManagementTest() {
// TODO Auto-generated constructor stub
}

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Book book=new Book("Abhinaw Tripathi", "Design-Pattern", "100", "2016", "2016");
book.getEdition();
book.getPageCount();
book.getTheTitle();

}

}