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Ridding Myself from Trailing Digits on Dollar Amts

earlmoore
earlmoore asked
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Last Modified: 2010-05-18
I'm trying to get a dollar amount in the format of $xx.xx.  Using the double datatype, when I multiply two numbers, sometimes I get a format of $xx.00000000007.  I know its stupid, but how can I restrict the output to only two digits after the decimal point?
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Commented:
One way to do this would be to ues a long instead of a double to represent your dollar amount.  This long would then represent the total number of cents.

Commented:
Whenever I need to deal with dollars, I avoid float and double like the plague. When you multiply and divide, you can easily get results that are ever so slightly off. I have found it far better to stick with int or long. Multiply the dollar values, add 50 and divide by 100 for a rounded result. (Add 0 to truncate, and 99 to round high).
Output can be done with something like:

StringBuffer dv=new StringBuffer(Integer.toString(dlr));
dv.insert(dv.length()-2,'.');
String dlrstr=dv.toString();

This produces the right string, and could be captured in some utility method.


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