How to get java scanner class to read a file as a argument from cmd

Question

I've got from code for java which I want to use the scanner class to output the contents of the file token by token from a file that was as an argument from the command line but it doesn't seem to work for me for some reason.

import java.io.*;
import java.util.*;
public class HashTable {
    public static void main(String args[]) {

    File inputfile = new File(args[0]);

    try {

        Scanner sr = new Scanner(inputfile);

        while (sr.hasNextLine()) {
        int i = sr.nextInt();
        System.out.println(i);
        }
        sr.close();
    } 
    catch (FileNotFoundException e) {
        e.printStackTrace();
    }
 }
}

Answer 1

You need to change:

int i = sr.nextInt();

by

String i = sr.next();

MisMatchException is caused by token out of range (to be converted into integer)

Answer 2

public static void main( final String[] args )
{
    final String input = "1 two 3 four five 6 7";
    final Scanner scanner = new Scanner(input);
    while ( scanner.hasNext() )
    {
        if ( scanner.hasNextInt() )
        {
            System.out.println( "int: " + scanner.nextInt() );
        }
        else
        {
            System.out.println ( "String: " + scanner.next() );
        }
    }
}

Answer 3

instead of

int i = sr.nextInt(); System.out.println(i);

use

System.out.println(sr.nextLine());