How to round integer in java

Question

I want to round the number 1732 to the nearest ten, hundred and thousand. I tried with Math round functions, but it was written only for float and double. How to do this for

Answer 1

What rounding mechanism do you want to use? Here's a primitive approach, for positive numbers:

int roundedNumber = (number + 500) / 1000 * 1000;

This will bring something like 1499 to 1000 and 1500 to 2000.

If you could have negative numbers:

int offset = (number >= 0) ? 500 : -500;
int roundedNumber = (number + offset) / 1000 * 1000;