Time Conversion

Question about the task

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I understand what the task is trying to make me do, but I don't understand how to do it. I've tried using millisecond to second conversions, but I can't seem to convert it, because I'm not getting the exact amount the milliseconds are giving me.

Implement three methods in the Solution class:

in the getMaxFromMilliseconds method, return the maximum Instant that can be obtained using the ofEpochMilli(long milliseconds) method;
in the method getMaxFromSeconds method, return the maximum Instant that can be obtained using the ofEpochSecond(long seconds) method;
in the method getMaxFromSecondsAndNanos method, return the maximum Instant that can be obtained using the ofEpochSecond(long seconds, long nanos) method.

Requirements:

The getMaxFromMilliseconds method must be implemented in accordance with the task conditions.
The getMaxFromSeconds method must be implemented in accordance with the task conditions.
The getMaxFromSecondsAndNanos method must be implemented in accordance with the task conditions.

package en.codegym.task.pro.task16.task1614; import java.time.Instant; /* The end of times */ public class Solution { public static void main(String[] args) { System.out.println(getMaxFromMilliseconds()); System.out.println(getMaxFromSeconds()); System.out.println(getMaxFromSecondsAndNanos()); } static Instant getMaxFromMilliseconds() { return Instant.ofEpochMilli(Long.MAX_VALUE); } static Instant getMaxFromSeconds() { // idk } static Instant getMaxFromSecondsAndNanos() { //return Instant.ofEpochSecond(Long.MAX_VALUE, Long.MAX_VALUE); } }

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Morteza Jalalvand

Level 31 , Iran

12 May, 09:40

For the nanseconds part, you could just use 999_999_999 as well. The instant class uses a separate int to store the nanoseconds.

Lisa L

Level 47 , Nuremberg, Germany

16 May 2022, 15:12

solution

I may be wrong... Cause the secs variant throws an exception when you use Long.MAX_VALUE I assume that number's to big ;) So you need to find out the max Instant and then get the seconds. And it's really funny, Instant has all the necessary methods, constants available you need... eg. Instant.MAX holding maximum supported Instant. On that object you could try to invoke getEpochSecond() to get the max supported seconds... maybe that's all. For the third method use the Instant.ofEpochSecond() facory taking two arguments, the first the now well know Instant.MAX.getEpochSecond() and for the second have a look at Instants getNano() method (invoked on Instant.MAX)

haayden

Level 18 , United States of America, United States

16 May 2022, 15:17

i think i tried those, but i will try them again

Lisa L

Level 47 , Nuremberg, Germany

16 May 2022, 15:24

smth like that I had in mind

return Instant.ofEpochSecond(Instant.MAX.getEpochSecond());

haayden

Level 18 , United States of America, United States

16 May 2022, 18:17

that worked, thanks. but theres no nano function, i'll try going about it, but if you figure it out i would like the answer, lol

Lisa L

Level 47 , Nuremberg, Germany

16 May 2022, 19:06

like I tried to explain above I'd try to do it similar to:

return Instant.ofEpochSecond(Instant.MAX.getEpochSecond(), Instant.MAX.getNano());

haayden

Level 18 , United States of America, United States

17 May 2022, 11:27

new life lesson for me: read slower i had alll the functions in front of me and i didnt see getNano. thank you, hopefully i can do the rest on my own.