Java:将秒转换为分钟、小时和天

Question

任务是:

The output should look like this (it is a good idea to echo back the input): You entered 500,000 seconds, which is 5 days, 18 hours, 53 minutes and 20 seconds. (5 days 18:53:20 hours)

我该怎么做？最简单的理解和执行方法是什么？

讲师还说“没有硬编码”，我不太确定这是什么，但我认为他希望我们为它们分配常量。

Answer 1

使用内置 <a href="https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/TimeUnit.html" rel="noreferrer noopener nofollow">TimeUnit</a> 的示例.

long uptime = System.currentTimeMillis();

long days = TimeUnit.MILLISECONDS
    .toDays(uptime);
uptime -= TimeUnit.DAYS.toMillis(days);

long hours = TimeUnit.MILLISECONDS
    .toHours(uptime);
uptime -= TimeUnit.HOURS.toMillis(hours);

long minutes = TimeUnit.MILLISECONDS
    .toMinutes(uptime);
uptime -= TimeUnit.MINUTES.toMillis(minutes);

long seconds = TimeUnit.MILLISECONDS
    .toSeconds(uptime);