Accuracy of double precision multiplication in java?

Question

What is the guaranteed accuracy of multiplication operator for double values in java?

For example, 2.2 * 100 is 220.00000000000003, but 220 is a double number. 220

Answer 1

you can use BigDecimal, but make sure that you use the construct of BigDecimal(String) rather than BigDecimal(double). The difference between them is: