DateTimeFormatterBuilderExample.java

DateTimeFormatter timeFormatter = new DateTimeFormatterBuilder()
                    .appendValue(HOUR_OF_DAY, 2)
                    .appendLiteral(':')
                    .appendValue(MINUTE_OF_HOUR, 2)
                    .optionalStart()
                    .appendLiteral(':')
                    .appendValue(SECOND_OF_MINUTE, 2)
                    .toFormatter();
            return LocalTime.now().format(timeFormatter);