chinabugotech/hutool · error · IllegalArgumentException

The date must not be null

Error message

The date must not be null

What it means

Error "The date must not be null" thrown in chinabugotech/hutool.

Source

Thrown at hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java:1702

	 * @param date2 日期2
	 * @return 是否为相同时间
	 * @since 4.1.13
	 */
	public static boolean isSameTime(Date date1, Date date2) {
		return date1.compareTo(date2) == 0;
	}

	/**
	 * 比较两个日期是否为同一天
	 *
	 * @param date1 日期1
	 * @param date2 日期2
	 * @return 是否为同一天
	 * @since 4.1.13
	 */
	public static boolean isSameDay(final Date date1, final Date date2) {
		if (date1 == null || date2 == null) {
			throw new IllegalArgumentException("The date must not be null");
		}
		return CalendarUtil.isSameDay(calendar(date1), calendar(date2));
	}

	/**
	 * 比较两个日期是否为同一周
	 *
	 * @param date1 日期1
	 * @param date2 日期2
	 * @param isMon 是否为周一。国内第一天为星期一，国外第一天为星期日
	 * @return 是否为同一周
	 */
	public static boolean isSameWeek(final Date date1, final Date date2, boolean isMon) {
		if (date1 == null || date2 == null) {
			throw new IllegalArgumentException("The date must not be null");
		}
		return CalendarUtil.isSameWeek(calendar(date1), calendar(date2), isMon);
	}

View on GitHub (pinned to 8870454b2a)

Solutions

1. Pass a non-null Date object; check for null before calling the method.
2. Use ObjectUtil.defaultIfNull or Optional to supply a default date.

When it happens

Trigger: Thrown at hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java:1702 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of chinabugotech/hutool@8870454b2a (2026-08-14). Data as JSON: /api/errors/f76d26cf4bcfb070. Report an issue: GitHub.