TopCoder 200 points 2-SRM 144 DIV 2 152.06/200 76.03%_inc. is strictly prohibited. (c)2010, topcoder, in-优快云博客

本文介绍了一个将秒数转换为标准时间格式（小时:分钟:秒）的方法。通过一个名为Time的类及其方法whatTime，实现了从秒数到时间格式的转换。此方法适用于计算机科学中的日期和时间处理任务。

Problem Statement 
  Computers tend to store dates and times as single numbers which represent the number of seconds or milliseconds since a particular date. Your task in this problem is to write a method whatTime, which takes an int,seconds, representing the number of seconds since midnight on some day, and returns a String formatted as "<H>:<M>:<S>". Here, <H> represents the number of complete hours since midnight, <M> represents the number of complete minutes since the last complete hour ended, and <S> represents the number of seconds since the last complete minute ended. Each of <H>, <M>, and <S> should be an integer, with no extra leading 0's. Thus, ifseconds is 0, you should return "0:0:0", while if seconds is 3661, you should return "1:1:1".
Definition 
  Class: Time
Method: whatTime
Parameters: int
Returns: String
Method signature: String whatTime(int seconds)
(be sure your method is public)
 
 
Constraints 
- seconds will be between 0 and 24*60*60 - 1 = 86399, inclusive.
Examples 
0)  
  0
Returns: "0:0:0"
 1)  


3661


Returns: "1:1:1"
 
2)  


5436


Returns: "1:30:36"
 
3)  


86399


Returns: "23:59:59"
 
This problem statement is the exclusive and proprietary property of TopCoder, Inc. Any unauthorized use or reproduction of this information without the prior written consent of TopCoder, Inc. is strictly prohibited. (c)2003, TopCoder, Inc. All rights reserved.
     




public class Time {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		whatTime(0);
	}

	public static String whatTime(int seconds) {
		int h;
		int m;
		int s;
		h = seconds / 3600;
		m = (seconds - 3600 * h) / 60;
		s = (seconds - 3600 * h) % 60;
		StringBuilder sb = new StringBuilder();
		String ss = (sb.append(h).append(":").append(m).append(":").append(s))
				.toString();
		System.out.println(ss);
		return ss;
	}
}