Method split

server/src/main/java/org/elasticsearch/common/Strings.java:311–322

Split a String at the first occurrence of the delimiter. Does not include the delimiter in the result. @param toSplit the string to split @param delimiter to split the string up with @return a two element array with index 0 being before the delimiter, and index 1 being after the delimiter

(String toSplit, String delimiter)

     *         or <code>null</code> if the delimiter wasn't found in the given input String
     */
    public static String[] split(String toSplit, String delimiter) {
        if (!hasLength(toSplit) || !hasLength(delimiter)) {
            return null;
        }
        int offset = toSplit.indexOf(delimiter);
        if (offset < 0) {
            return null;
        }
        String beforeDelimiter = toSplit.substring(0, offset);
        String afterDelimiter = toSplit.substring(offset + delimiter.length());
        return new String[]{beforeDelimiter, afterDelimiter};
    }

    /**
     * Tokenize the given String into a String array via a StringTokenizer.