Okay, I just need to be able to display ONLY the decimal on a double number, and it must display every digit.

I thought about using DecimalFormat but I don't think it will allow me to display every digit without displaying zeros on some.

Example:
Input:
3.42
17.0
47.151



I would have to find a way to take the whole integer portion of each double, and subtract it from the original
Printing doubles without DecimalFormat will do what I want about (display each decimal digit, while not showing zeros)
So, how would I go about assigning maybe the integer whole portion of each double to a int variable, and subtracting it.
Then, multiplying the decimal by 100 to change it to a whole number.
Keep in mind, I will not know what the input will be.

Correct Output:
42
0
151

Here's what I've got thus far in order to only get the decimal:

double num = 3.42;
int num2 = 3;

double total = (num-num2);

BUT

when I do this, it assigns .4199999999993 to total...
Why does it do this?

i wouldn't recommend trying to handle it yourself. keep in mind doubles are stored in ieee format, which is binary.

http://en.wikipedia.org/wiki/Double-precision_floating-point_format

How would I go about doing this in a different method? My knowledge of java is pretty limited thus far lol...

maybe use mod? e: actually I think you'll have the same precision issues

This post was edited by Aimed_Shot on Oct 14 2014 07:28pm

i would double check the decimal format. otherwise, cast to string, grab what's right of the decimal.

I posted on stackoverflow and i was directed to using BigDecimal... Problem is, i've never used BigDecimal, and I really don't see how to use it..

Thanks for the help. Out of some miracle, I tried using "#" in DecimalFormat

It worked as it rounds properly. I'll try other numbers

Problem is, 99.99 gives 100, as it rounds up to 100.

I'll check out that BigDecimal

This post was edited by DD_Rocking on Oct 14 2014 08:28pm

I'm like going cross-eyed looking at this for some reason.. I hate to ask for spoon feeding, but I literally don't know what to do...

What would I use in order to use it with my example?