Here is the CSV info The Goldfinch Donna Tartt 2014 The Orphan Master\'s Son Ada
ID: 638844 • Letter: H
Question
Here is the CSV info
The Goldfinch Donna Tartt 2014 The Orphan Master's Son Adam Johnson 2013 No Pulitzer prize for fiction was awarded in 2012 A Visit from the Goon Squad Jennifer Egan 2011 Tinkers Paul Harding 2010 Olive Kitteridge Elizabeth Strout 2009 The Brief Wondrous Life of Oscar Wao Junot Diaz 2008 The Road Cormac McCarthy 2007 March Geraldine Brooks 2006 Gilead Marilynne Robinson 2005 The Known World Edward P. Jones 2004 Middlesex Jeffrey Eugenides 2003 Empire Falls Richard Russo 2002 The Amazing Adventures of Kavalier & Clay Michael Chabon 2001 Interpreter of Maladies Jhumpa Lahiri 2000 The Hours Michael Cunningham 1999Explanation / Answer
package com.book;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Scanner;
class Book implements Comparable<Book>{
private String title;
private String author;
private int year;
public String getTitle() {
return title;
}
public String getAuthor() {
return author;
}
public int getYear() {
return year;
}
public Book(String title,String author,int year) {
this.title=title;
this.author=author;
this.year=year;
}
//return the list of books read from the csv
public static List<Book> getList(String csvFileName) {
return readCsv(csvFileName);
}
//to read csv file
private static List<Book> readCsv(String csvFileName) {
List<Book>bookList=null;
if(csvFileName!=null && csvFileName.length()>0){
BufferedReader br = null;
String line = "";
String cvsSplitBy = ",";
try {
br = new BufferedReader(new FileReader("/"+csvFileName));
bookList=new ArrayList<Book>();
while ((line = br.readLine()) != null) {
// use comma as separator
String[] bookInfo = line.split(cvsSplitBy);
if(!isWrongPattern(bookInfo)){
bookList.add(new Book(bookInfo[0], bookInfo[1], Integer.parseInt(bookInfo[2])));
}else{
StringBuilder errBldr=new StringBuilder();
errBldr.append("Problem reading in ");
for(int i=0;i<bookInfo.length;i++){
errBldr.append(""+bookInfo[i]+"");
if(i<bookInfo.length-1){
errBldr.append(",");
}
}
System.err.println(errBldr);
}
}
} catch (FileNotFoundException e) {
System.out.println(e.getMessage());
} catch (IOException e) {
e.printStackTrace();
} finally {
if (br != null) {
try {
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}else{
System.out.println("Please enter valid csv file name");
}
return bookList;
}
//to determine whether the pattern in csv is wrong or not
private static boolean isWrongPattern(String[] bookInfo){
boolean isInValid=false;
if(bookInfo.length!=3){
isInValid=true;
}else if(!isInteger(bookInfo[2])){
isInValid=true;
}
return isInValid;
}
//to check whether the year is in integer format or not
private static boolean isInteger(String s) {
try {
Integer.parseInt(s);
} catch(NumberFormatException e) {
return false;
}
// only got here if we didn't return false
return true;
}
@Override
public String toString() {
return this.title+" by "+this.author+" ("+this.year+")";
}
//to sort on the title of the book
@Override
public int compareTo(Book book) {
return this.getTitle().compareTo(book.getTitle());
}
}
public class BookApp {
public static void main(String[]args){
Scanner sc=new Scanner(System.in);
System.out.println("Please enter the name of your csv file");
List<Book>bookList=Book.getList(sc.next());
System.out.println("Number of books read in : "+bookList.size()+" ");
System.out.println("Sorted book list :");
Collections.sort(bookList);
for(Book book:bookList){
System.out.println(book);
}
System.out.println(" "+"Reverse order :");
Collections.reverse(bookList);
for(Book book:bookList){
System.out.println(book);
}
sc.close();
}
}