scan integer

import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Main {
  public static void main(String[] args) {
    File f = new File("sample.txt");
    Scanner in = null;
    try {
      in = new Scanner(f);
    }
    catch (Exception e) {
    }
    List<Integer> array = new ArrayList<Integer>();
    while (in.hasNext()) {
      array.add(new Integer(in.next()));
    }
    System.out.println(array);
  }
}