Kevin Bowersox - 2 months ago 19
Java Question

# Java Milliseconds in Year

I am doing some date calculations in Java using milliseconds. I do not have much experience working with milliseconds and cannot even determine how many milliseconds are in a year. Here is my attempt:

``````private static final int MILLIS_IN_SECOND = 1000;
private static final int SECONDS_IN_MINUTE = 60;
private static final int MINUTES_IN_HOUR = 60;
private static final int HOURS_IN_DAY = 24;
private static final int DAYS_IN_YEAR = 365; //I know this value is more like 365.24...
private static final long MILLISECONDS_IN_YEAR = MILLIS_IN_SECOND * SECONDS_IN_MINUTE * MINUTES_IN_HOUR * HOURS_IN_DAY * DAYS_IN_YEAR;

System.out.println(MILLISECONDS_IN_YEAR);  //Returns 1471228928
``````

I know that that 1 Year = 31556952000 Milliseconds, so my multiplication is off somehow.

Can anyone point out what I am doing wrong? Should I be using a long?

Yes. The problem is that, since `MILLIS_IN_SECOND` and so on are all `int`s, when you multiply them you get an `int`. You're converting that `int` to a `long`, but only after the `int` multiplication has already resulted in the wrong answer.
To fix this, you can cast the first one to a `long`:
``````    private static final long MILLISECONDS_IN_YEAR =