Java Utililty Methods Stack Usage

int pos = relativePath.indexOf('?');
if (pos != -1) {
    relativePath = relativePath.substring(0, pos);
pos = relativePath.indexOf('#');
if (pos != -1) {
    relativePath = relativePath.substring(0, pos);
if (relativePath.indexOf('/') == -1) {
    return relativePath;
String[] parts = relativePath.split("/");
Stack<String> path = new Stack<String>();
String part;
for (int i = 0; i < parts.length; i++) {
    part = parts[i].trim();
    if (part.isEmpty() || part.equals(".")) {
    } else if (part.equals("..")) {
        path.pop();
    } else {
        path.add(part);
String absoluteUrl = "";
if (path.size() > 0) {
    for (int i = 0; i < path.size(); i++) {
        if (i > 0 && path.get(i).indexOf('.') != -1 && path.get(i - 1).equals(path.get(i))) {
            continue;
        absoluteUrl += "/" + path.get(i);
} else {
    absoluteUrl = "/";
if (relativePath.endsWith("/") && !absoluteUrl.endsWith("/")) {
    absoluteUrl = absoluteUrl + "/";
return absoluteUrl;

int pos = text.indexOf('(');
if (pos == -1)
    return text;
Stack<Integer> stack = new Stack<Integer>();
pos = 0;
while (pos < text.length()) {
    if (text.charAt(pos) == '(') {
        stack.push(pos);
...

Stack<Character> stack = new Stack<>();
String expr = removeComments(line);
boolean flag = false;
int index = 0;
for (char c : line.toCharArray()) {
    ++index;
    if (c == '(') {
        if (!flag) {
...

int next = cursor + 1;
int end = indexOfSeparateIfSentence(lines, lines.get(cursor), next);
if (end != -1) {
    for (int i = cursor; i < end; i++) {
        target.add(lines.get(i));
    target.add(lines.get(end) + " {");
    target.add(lines.get(end + 1));
...

return split(str, null, -1);

return split(string, token, 0);