Method split

jOOQ/src/main/java/org/jooq/tools/StringUtils.java:1451–1481

A custom adaptation of Pattern#split(CharSequence, int). This is useful if the matched split-tokens should be returned as well. For example: split("e", "hello world") // ["h", "e", "llo world"] split("o", "hello world") // ["hell", "o", " w", "o", "rld"] split("[eo]", "

(String regex, CharSequence input)

     * The result will always be an odd-length array.
     */
    public static String[] split(String regex, CharSequence input) {
        int index = 0;
        ArrayList<String> matchList = new ArrayList<>();
        Matcher m = Pattern.compile(regex).matcher(input);

        // Add segments before each match found
        while (m.find()) {
            matchList.add(input.subSequence(index, m.start()).toString());
            matchList.add(input.subSequence(m.start(), m.end()).toString());

            index = m.end();
        }

        // If no match was found, return this
        if (index == 0)
            return new String[] { input.toString() };

        // Add remaining segment
        matchList.add(input.subSequence(index, input.length()).toString());

        // Construct result
        Iterator<String> it = matchList.iterator();
        while (it.hasNext()) {
            if ("".equals(it.next())) {
                it.remove();
            }
        }

        String[] result = new String[matchList.size()];
        return matchList.toArray(result);
    }

}