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The following question makes use of the generic Box class discussed in the reading assignment.

public static class Box<T> { private...

X1039: Find Last Negative Box

The following question makes use of the generic Box class discussed in the reading assignment.

public static class Box<T>
{
    private T value;

    public Box(T val)
    {
        value = val;
    }

    public T getValue()
    {
        return value;
    }
}

The method below takes in a list of Box objects, each containing an Integer value, and should return the index of the last box that contains a negative number. You can use a numeric for loop to iterate over the list in reverse order. The method should return -1 if the value is not found anywhere in the list.

For example, consider this list.

  List<Box<Integer>> arr = new List<Box<Integer>>();

  arr.add(new Box<Integer>( 1));  // Box at index 0, contains  1
  arr.add(new Box<Integer>(-2));  // Box at index 1, contains -2
  arr.add(new Box<Integer>(-3));  // Box at index 2, contains -3
  arr.add(new Box<Integer>( 4));  // Box at index 3, contains  4

A call to lastNegativeBox() on this list should return 2.

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