Method getMonth

lib/DevApp/src/main/java/dev/utils/common/DateUtils.java:520–523

获取月份 ( 0 - 11 ) + 1 @param calendar Calendar @return 月份

(final Calendar calendar)

     * @return 月份
     */
    public static int getMonth(final Calendar calendar) {
        if (calendar != null) return calendar.get(Calendar.MONTH) + 1;
        return -1;
    }

    // =