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Start your free trialDaniel Silva
5,353 PointsJava can't find my csv file
I have the csv file in the source folder where this class is located. I get an exception thrown at me.
package books;
import java.io.BufferedReader;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import org.omg.CORBA.portable.InputStream;
public class BookApp {
public static void main(String[] args){
List<Book> b = Book.getList("src/books.csv");
System.out.println();
System.out.println("Sorted List:");
Collections.sort(b);
for(Book book: b){
System.out.println(book.toString());
}
Comparator c = Collections.reverseOrder();
Collections.sort(b, c);
System.out.println();
System.out.println("Reverse Order:");
for(Book book: b){
System.out.println(book.toString());
}
}
}
package books;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Scanner;
public class Book implements Comparable<Book> {
private String title;
private String author;
private int year;
public Book(String title, String author, int year){
this.title=title;
this.author=author;
this.year=year;
}
public String getTitle(){
return title;
}
public String getAuthor(){
return author;
}
public int getYear(){
return year;
}
@Override
public String toString(){
return title +" by " + author +"("+year+")";
}
public static List<Book> getList(String f){
List<Book> books = new ArrayList<>();
int bookNo = 0;
File file = new File(f);
Scanner input;
try {
input = new Scanner(file);
while(input.hasNext()){
String[] parts = input.nextLine().split(",");
if(parts.length==3){
Book b = new Book(parts[0],parts[1],Integer.parseInt(parts[2]));
books.add(b);
bookNo++;
}else{
System.out.println("Problem reading: "+Arrays.toString(parts).replace("[","").replace("]", ""));
}
}
input.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
}
System.out.println("Number of books: "+bookNo);
return books;
}
@Override
public int compareTo(Book o) {
return this.getTitle().compareTo(o.getTitle());
}
}
1 Answer
Alex Bratkovskij
5,329 Pointsif its in the same folder, maybe try using:
List<Book> b = Book.getList("books.csv");
Daniel Silva
5,353 PointsDaniel Silva
5,353 PointsHi Alex, thanks for comment. I actually tried doing that too and the compiler threw the same error.
Alex Bratkovskij
5,329 PointsAlex Bratkovskij
5,329 Pointswhat was the compiler error?
Daniel Silva
5,353 PointsDaniel Silva
5,353 Pointsthe file does not exits.
Alex Bratkovskij
5,329 PointsAlex Bratkovskij
5,329 PointsThe whole sentence? Can you just copy paste the error it throws?
Daniel Silva
5,353 PointsDaniel Silva
5,353 PointsI'd be happy to do that. I'll have to post it later today as I'm currently at work :-/.
Daniel Silva
5,353 PointsDaniel Silva
5,353 PointsThis is the error I'm getting.
java.io.FileNotFoundException: books.csv (No such file or directory) at java.io.FileInputStream.open0(Native Method) at java.io.FileInputStream.open(FileInputStream.java:195) at java.io.FileInputStream.<init>(FileInputStream.java:138) at java.util.Scanner.<init>(Scanner.java:611) at books.Book.getList(Book.java:45) at books.BookApp.main(BookApp.java:14)