hadoop: sum double numbers is wrong in Java [duplicate]

mardi 14 avril 2015

This question already has an answer here:

I sum like below: 10 + 20.99 = 30.99 but 30.99 + 5.0 = 35.98999999999995 why it doesn't equal to 35.99

Here is my code:


double amount = 0.0;
for (OrderVO orderVO : invoiceCreate.getLstOrderVO()) {
    amount += Double.parseDouble(orderVO.getOrderAmount());
}

First loop orderVO.getOrderAmount() = 10 and get amount = 10.0

Second loop orderVO.getOrderAmount() = 20.99 and get amount = 30.99

Third loop orderVO.getOrderAmount() = 5 and get amount = 35.989999999995

How can I get 35.99 (dont round it)?

hadoop