Java Time Calculator Program Help

Question

Write a program using JAVA and FINAL variables that asks the user to enter a number of seconds.

1. There are 60 seconds in a minute. If the number of seconds entered by the user is greater than or equal to 60, the program should display the number of minutes in that many seconds.
2. There are 3,600 seconds in an hour. If the number of seconds entered by the user is greater than or equal to 3,600, the program should display the number of hours in that many seconds.
3. There are 86,400 seconds in a day. If the number of seconds entered by the user is greater than or equal to 86,400, the program should display the number of days in that many seconds.

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)

If the result is 0 days, then don't display the days, if the hours is 0 and the days are 0, then don't display the hours, if the minutes are 0, the hours are 0 and the days are 0, then only display the seconds. Also, if the result is 3 hours, 2 minutes and 5 seconds for example, don't display 3:2:5, instead display 3:02:05

Make sure you use constants in your program to represent the seconds in one minute, hour and day.

Answer 1

import java.io.*;

class TimeCalc

{

public final int SECONDS_PER_MINUTE=60;

public final int MINUTES_PER_HOUR = 60;

public final int HOURS_PER_DAY = 24;

public final int DAYS_PER_YEAR = 365; //does not count leap years

private long numSeconds;

private int years;

private int days;

private int hours;

private int minutes;

private int seconds;

TimeCalc( long sec)

{

numSeconds = sec;

years = days=hours=minutes=seconds=0;

}

public void Calculate()

{

seconds = (int) (numSeconds % SECONDS_PER_MINUTE);

minutes = (int) (numSeconds / SECONDS_PER_MINUTE);

hours = minutes / MINUTES_PER_HOUR;

minutes = minutes % MINUTES_PER_HOUR;

days = hours / HOURS_PER_DAY;

hours = hours % HOURS_PER_DAY;

years = days / DAYS_PER_YEAR;

days = days % DAYS_PER_YEAR;

}

public void Output()

{

System.out.println(" # of seconds : " + numSeconds);

if (years>0)

{

System.out.print( years + " years ");

}

if (days >0)

{

System.out.print( days + " days ");

}

if ( hours > 0)

{

System.out.print( hours + " hours ");

}

if ( minutes >0)

{

System.out.print( minutes + " minutes ");

}

if (seconds >0)

{

System.out.println( seconds + " seconds ");

}

System.out.println("------------------------");

if (days >0)

{

System.out.print( days + " days ");

}

String outbuff = " ";

if (hours>0)

{

if (hours>9)

{

outbuff = outbuff + hours;

}

else

{

outbuff = outbuff + "0" + hours;

}

outbuff = outbuff + ":";

}

if (minutes>0)

{

if (minutes>9)

{

outbuff = outbuff + minutes;

}

else

{

outbuff = outbuff + "0" + minutes;

}

outbuff = outbuff + ":";

}

else

{

if (hours>0)

{

outbuff = outbuff + "00";

}

}

if (seconds >0)

{

if (seconds>9)

{

outbuff = outbuff + seconds;

}

else

{

outbuff = outbuff + "0" + seconds;

}

}

else

{

outbuff = outbuff + "00";

}

System.out.println(outbuff);

}

public void Go()

{

Console console = System.console();

String inbuff;

try

{

System.out.print(" Please input the number of seconds :>");

inbuff = console.readLine();

long numSeconds = Long.parseLong(inbuff);

TimeCalc myTimeCalc = new TimeCalc(numSeconds);

myTimeCalc.Calculate();

myTimeCalc.Output();

}

catch (Exception ex)

{

System.out.println(" Input exception has occured ");

}

} //Go

public static void main(String args[])

{

TimeCalc myTimeCalc = new TimeCalc(0);

myTimeCalc.Go();

}

} //class