Reading File Input - Display All Values

I've been trying to learn how to read in file input and have a question about this piece of code:

Java Code:

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Scanner;
public class readFile {

public static void main(String args[]) throws FileNotFoundException{
File file = new File("file.txt");
int sum[]=new int[5];
int i=0;

[Code] .....

"file.txt" holds the following information:

1
2
88
42
56
89

But my output looks like:

2
42
89

if I take out sum[i]=input.nextInt(); it will display all values in the file.