// CSE 143, Winter 2010, Marty Stepp
// This program uses the ArrayList class to create a list of integers.
// It uses the Integer "wrapper class" to do this, because you can't create
// an ArrayList<int>.
// This program also demonstrates a method that accepts a list as a parameter.

import java.io.*;
import java.util.*;

public class ProcessFile2 {
    public static void main(String[] args) throws FileNotFoundException {
        // int[] numbers = new int[1000];
        ArrayList<Integer> numbers = new ArrayList<Integer>();
        
        Scanner input = new Scanner(new File("numbers.txt"));
        while (input.hasNextInt()) {
            int n = input.nextInt();
            numbers.add(n);
        }
        System.out.println(numbers);
        
        filterEvens(numbers);
        System.out.println(numbers);
    }
    
    // Removes all elements with even values from the given list.
    public static void filterEvens(ArrayList<Integer> list) {
        for (int i = 0; i < list.size(); i++) {
            int n = list.get(i);
            if (n % 2 == 0) {
                list.remove(i);
                i--;
            }
        }
    }
}