Question

Possible Duplicate:
How to round a number to n decimal places in Java

When multiplying two numbers in java happens this:

double a = 9.495 * 100;

Expected result:

a = 949.5;

But the obtained result is:

a = 949.4999999999999

When I try to round number 9.495 in two decimal places the result is 9.49 instead of 9.50

Any ideas how to solve this problem?

Answer 1

If you want accurate floating point computations, do not use the float or double types, but rather make use of the BigDecimal class.