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(); } }

#DesignPattern #CoreJava #LibraryManagementSystem