使用Java扫描文本文件

Question

The purpose is to print-out a list of names from a .txt file. The code I've used is below.

import java.util.ArrayList;

import java.util.Scanner;

import java.io.File;

import java.io.FileNotFoundException;


public class FileScanner3 {

public static void main(String args []) throws FileNotFoundException {

    ArrayList<String> names = new ArrayList<String>();
    String inName;

    //Setup a scanner to read from a text file
    Scanner in = new Scanner(new File("namefile.txt").getAbsoluteFile());

    while (in.hasNextLine()) {
        inName = in.next();     
        //Use next() to read string
        names.add(inName);
    }

    //Tidy up by closing files
    in.close();

    //Print names ArrayList
    for(int i =0; i<names.size(); i++) {
        System.out.println((i + 1) + "\t" + names.get(i));
    }
}
}

The error that I get is this:

Exception in thread "main" java.util.NoSuchElementException

at java.util.Scanner.throwFor(Unknown Source)

at java.util.Scanner.next(Unknown Source)

at FileScanner3.main(FileScanner3.java:17)

If anyone is able to tell me what is wrong, that would be fantastic!

Edit: Spelling

Answer 1

Without the text file, it is hard to guess, but I suppose there is a blank line at the end of the file. You could prevent this error by chaning the inner loop to

 while (in.hasNext()) {
        inName = in.next();     
        //Use next() to read string
        names.add(inName);
 }

I hope it helps.