


Let n = 15432 seconds 1. We can find the # seconds as follows: 257 < # minutes  60 / 15432 15420  12 < # seconds So: 15432 seconds = 257 minutes + 12 seconds Or: 15432 seconds = 15432 / 60 minutes + 15432 % 60 seconds 
input n; // n = total number of seconds seconds = n % 60; // computes seconds n = n / 60; // n is now = remaining minutes minutes = n % 60; // computes minutes n = n / 60; // n is now = remaining hours hours = n; 
n = 15432; hours = 15432 / 3600 = 4 r = 15432 % 3600 = 1032 minutes = 1032 / 60 = 17 seconds = 1032 % 60 = 12 
import java.util.Scanner; public class Hours { public static void main(String[] args) { int n, r, hours, minutes, seconds; Scanner in = new Scanner(System.in); System.out.print("Enter # seconds: "); n = in.nextInt(); // in.nextInt() reads in an integer value seconds = n % 60; // computes seconds n = n / 60; // n is now = remaining minutes minutes = n % 60; // computes minutes n = n / 60; // n is now = remaining hours hours = n; System.out.print(n); System.out.print(" seconds = "); System.out.print(hours); System.out.print(" hours + "); System.out.print(minutes); System.out.print(" minutes+ "); System.out.print(seconds); System.out.println(" seconds."); } } 
How to run the program:



Let n = 100000000 millisec 1. Find total number of seconds since midnight, Jan 1 1970: n = n / 1000 = 100000000 / 1000 = 100000 (total # seconds) 2. Find seconds in current time: seconds = n % 60 = 100000000 % 1000 = 40 *** part of answer n = n / 60 = 100000 / 60 = 1666 (total # minutes) 3. Find minutes in current time: minutes = n % 60 = 1666 / 60 = 46 *** part of answer n = n / 60 = 1666 % 60 = 27 (total # hours) 3. Find hours in current time: hours = n % 24 = 27 % 24 = 3 *** part of answer 
n = System.currentTimeMillis(); // n = total # milli sec n = n / 1000; // n is now = total # sec seconds = n % 60; // Compute seconds in current time n = n / 60; // n is now = total # minutes minutes = n % 60; // Compute minutes in current time n = n / 60; // n is now = total # hours hours = n % 24; // Compute hours in current time 
public class ShowCurrentTime { public static void main(String[] args) { long nMillis; // We need long for accuracy !!! long n, hours, minutes, seconds; nMillis = System.currentTimeMillis(); n = nMillis/1000; // Total # Second; seconds = n % 60; // Seconds n = n / 60; // Total # minutes; minutes = n % 60; // Minutes n = n / 60; // Total # hours; hours = n % 24; // Hours System.out.print(hours); System.out.print(":"); System.out.print(minutes); System.out.print(":"); System.out.print(seconds); System.out.println(" GMT"); } } 
How to run the program:
