floating point - DecimalFormat weird behavior with pattern #####0.00 in Java -

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i using below code snap display float price value 2 decimal points.

numberformat format = new decimalformat("#####0.00"); float myfloatvalue =\\i able fetch value dynamically string finalprice = format.format(myfloatvalue); // using string (finalprice) export xml purpose.

it seems working fine normally, have noticed examples(given below) not working , produce price more 2 decimal points. not able replicate again, can see in log files.

some examples output of finalprice string : 0.10999966, 0.1800003, 0.45999908.

can me guess original value of myfloatvalue these outputs? me replicate scenario , fix it.

the sporadic occurrence makes me wonder whether decimal_format used in several threads concurrently. no-no. 1 expect wrong values too.

maybe order specify fixed locale (decimal point vs. comma, thousand separators).

and float or double not suited financial software: numbers approximations.

bigdecimal price = new bigdecimal("9.99"); price = price.multiply(bigdecimal.two); // 19.98 exact

bigdecimal pita writing calculations, keeps precision.


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