Method stackHeight

java/Chapter 9/Question9_10/Question.java:8–17

(ArrayList<Box> boxes)

public class Question {
	
	public static int stackHeight(ArrayList<Box> boxes) {
		if (boxes == null) {
			return 0;
		}
		int h = 0;
		for (Box b : boxes) {
			h += b.height;
		}
		return h;
	}
	
	public static ArrayList<Box> createStackR(Box[] boxes, Box bottom) {
		int max_height = 0;