如何以秒为单位获取自午夜以来的时间 [英] How to get the time since midnight in seconds

问题描述

首先，这是我在 Java 1 课程中遇到的一个简单问题.这是一个静态时间，我已经设置为今天"的 8:49:12，我要弄清楚这代表午夜和午夜过后多少秒.8 小时 49 分 12 秒.这是我现在的代码:

First off, this is a simple question that I'm stuck on in my Java 1 class. It's a static time that I set already as 8:49:12 "today" and I'm to figure out how many seconds past midnight and "to" midnight this represents. 8 hours, 49 minutes, and 12 seconds. Here is my code now:

hour    = 8;
minute  = 59;
second  = 32;
System.out.println("The static time used for this program was: " + hour + ":" + minute + ":" + second);

我的问题是我不知道如何获取从和从午夜开始的时间.

My issue is that I have no clue on how to get the time from and since midnight.

所以基本上输出需要是:

So basically the output needs to be:

Number of seconds since midnight: 
Number of seconds to midnight:

后面的空格是秒.

谢谢，请解释原因，以及您如何选择解决此问题的方法.我想学习:P

Thanks, and please explain why, and how you chose how to solve this. I want to learn :P

推荐答案

试试这个简单的数学:

System.out.println("Number of seconds since midnight:" +(second + (minute*60) + (hour*3600)));
System.out.println("Number of seconds to midnight:" +((60-second) + ((60-1-minute)*60) + (24-1-hour)*3600));

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