ReadIntegerFromFile.java

import java.io.*;
import java.util.ArrayList;
import java.util.Scanner;

public class t2 {
	public static void main(String [] args) throws IOException
	{
			Scanner scanner = new Scanner(new File("t2.txt"));
			//int [] array = new int [100];
			ArrayList array = new ArrayList();
			int i = 0;
			while(scanner.hasNextInt()){
			   array.add(scanner.nextInt());
			}
			System.out.println(array.toString());
	}
}

Usage of basic Scanner for read file

Hi I'm Cyril