I need to create a list that has both colums 1 and 2 equal [closed]

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NOTE: The question has been heavily edited, to the point that it is now a completely different question. This answer is for the original question. The edited question makes no sense to me at this point, so I have not modified this answer to address the edited version.

This should do it:

public static List<Integer> lessThanZero(List<Integer> list) {
    List<Integer> result = new ArrayList<>();
    for (Integer val : list) {
        if (val < 0) {
            result.add(val);
        }
    }
    return result;
}

Or, as of Java 8, you can do it with streams:

public static List<Integer> lessThanZero(List<Integer> list) {
    return list.stream().filter(v -> v < 0).collect(Collectors.toList());
}

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