String list difference - yielding empty list

Script

List split = new ArrayList();
if (!string.equals("")) {
	String regexString = ",";
	if (regex != void) {
		regexString = regex;
	}
	String[] result = string.split(regexString);
	for (int i = 0; i < result.length; i++) {
		split.add(result[i]);
	}
}

Script

List split = new ArrayList();
if (!string.equals("")) {
	String regexString = ",";
	if (regex != void) {
		regexString = regex;
	}
	String[] result = string.split(regexString);
	for (int i = 0; i < result.length; i++) {
		split.add(result[i]);
	}
}

Script

List difference = new ArrayList();
for (Iterator i = list1.iterator(); i.hasNext();) {
	Object o = i.next();
	if (!list2.contains(o)) {
		difference.add(o);
	}
}
for (Iterator i = list2.iterator(); i.hasNext();) {
	Object o = i.next();
	if (!list1.contains(o)) {
		difference.add(o);
	}
}

Value

Value