Integer round in java

Question

In Java, I want to round up to the closest integer value eliminating the last 2 digits

from 54321 -> 54300 or 8765 -> 8800

Answer 1

Assuming you want to round 8550 to 8600, just use:

int rounded = ((original + 50) / 100) * 100;

The division will just truncate, but the previous addition will bias that truncation to give an overall round-up effect.

EDIT: As noted by Peter, you need to consider negative numbers separately, and probably subtract 50 instead of adding it.