void (String version) { this.value = version; items = new ListItem(); version = StringUtil.toLowerCase(version); ListItem list = items; Stack<Item> stack = new Stack<>(); stack.push(list); boolean isDigit = false; int startIndex = 0; for (int i = 0; i < version.length(); i++) { char c = version.charAt(i); if (c == '.') { if (i == startIndex) { list.add(IntegerItem.ZERO); } else { list.add(parseItem(isDigit, version.substring(startIndex, i))); } startIndex = i + 1; } else if (c == '-') { if (i == startIndex) { list.add(IntegerItem.ZERO); } else { list.add(parseItem(isDigit, version.substring(startIndex, i))); } startIndex = i + 1; if (isDigit) { list.normalize(); // 1.0-* = 1-* if ((i + 1 < version.length()) && Character.isDigit(version.charAt(i + 1))) { // new ListItem only if previous were digits and new char is a digit, // ie need to differentiate only 1.1 from 1-1 list.add(list = new ListItem()); stack.push(list); } } } else if (Character.isDigit(c)) { if (!isDigit && i > startIndex) { list.add(new StringItem(version.substring(startIndex, i), true)); startIndex = i; } isDigit = true; } else { if (isDigit && i > startIndex) { list.add(parseItem(true, version.substring(startIndex, i))); startIndex = i; } isDigit = false; } } if (version.length() > startIndex) { list.add(parseItem(isDigit, version.substring(startIndex))); } while (!stack.isEmpty()) { list = (ListItem)stack.pop(); list.normalize(); } canonical = items.toString(); }