and Eclipse console gives answer as 1471228928
But my calculator says the answer is 31536000000
I thought I might have exceeded the max long value. But Oracle says:
The long data type is a 64-bit signed two's complement integer. It has a minimum value of -9,223,372,036,854,775,808 and a maximum value of 9,223,372,036,854,775,807 (inclusive).
Obviously I am doing something very, very stupid. But what?
Your variable is a long, but the expression is not because the values in the expression are not. You can force the expression to be evaluated as long by making any one of the values a long literal (rather than the current int literals).
No, you're not doing anything wrong. It's just that you're not aware of how Java determines the type of literal numbers..
The key insight is that "365*24*60*60*1000" is not a long expression, but an int expression, since all its constituent parts are ints - which overflows. You can force it to be a long expression by making one of its factors a long, e.g. the first one: "365l*24*60*60*1000". The "l" after 365 basically says to the compiler: never mind what this number looks like (and it looks like an int), treat it as a long.
Ulf Dittmer wrote:by making one of its factors a long, e.g. the first one: "365l*24*60*60*1000". The "l" after 365 basically says to the compiler: never mind what this number looks like (and it looks like an int), treat it as a long.
Although I'd recommend a capital 'L', which doesn't look so much like the number 1 as lowercase 'l' does.
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