chinabugotech/hutool · error · IllegalArgumentException

Seconds must be a positive number!

Error message

Seconds must be a positive number!

What it means

Error "Seconds must be a positive number!" thrown in chinabugotech/hutool.

Source

Thrown at hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java:1969

		int result = 0;
		for (int i = lastIndex; i >= 0; i--) {
			result += Integer.parseInt(hms.get(i)) * Math.pow(60, (lastIndex - i));
		}
		return result;
	}

	/**
	 * 秒数转为时间格式(HH:mm:ss)<br>
	 * 参考：<a href="https://github.com/iceroot">https://github.com/iceroot</a>
	 *
	 * @param seconds 需要转换的秒数
	 * @return 转换后的字符串
	 * @since 3.1.2
	 */
	public static String secondToTime(int seconds) {
		if (seconds < 0) {
			throw new IllegalArgumentException("Seconds must be a positive number!");
		}

		int hour = seconds / 3600;
		int other = seconds % 3600;
		int minute = other / 60;
		int second = other % 60;
		final StringBuilder sb = new StringBuilder();
		if (hour < 10) {
			sb.append("0");
		}
		sb.append(hour);
		sb.append(":");
		if (minute < 10) {
			sb.append("0");
		}
		sb.append(minute);
		sb.append(":");
		if (second < 10) {

View on GitHub (pinned to 8870454b2a)

Solutions

1. Pass a positive number of seconds; validate the argument before the call.
2. Use Math.max(1, seconds) if a non-positive value may flow in.

When it happens

Trigger: Thrown at hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java:1969 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/ca11b56674dfb45a. Report an issue: GitHub.