Format double to 2 decimal places with leading 0s

Question

Possible Duplicate:
Round a double to 2 significant figures after decimal point

I am trying to format a double to 2 decimal places with leading zeros and there's no luck. Here is my code:

Double price = 32.0;
DecimalFormat decim = new DecimalFormat("#.##");
Double price2 = Double.parseDouble(decim.format(price));

And I want output to be 32.00 instead I get 32.0
Any solutions??

Since it looks like you're dealing with currency here, consider using `BigDecimal` to represent money. Using floating-point numbers can lead to rounding problems. — Tyler Treat, Oct 20 '10 at 00:22
I'm sure there are a million SO threads on currency. I prefer integers to BigDecimal and then I deal in terms of pennies. Of course, that's neither here nor there... — Tony Ennis, Oct 20 '10 at 00:30
your code isn't quite right (for example you never show how you are getting the output). Could you change your program to a complete working one (with a class and a main method) and tell us the expected output? — TofuBeer, Oct 20 '10 at 14:19

score 60 · Accepted Answer · edited Dec 04 '12 at 07:20

60

OP wants leading zeroes. If that's the case, then as per Tofubeer:

    DecimalFormat decim = new DecimalFormat("0.00");

Edit:

Remember, we're talking about formatting numbers here, not the internal representation of the numbers.

    Double price = 32.0;
    DecimalFormat decim = new DecimalFormat("0.00");
    Double price2 = Double.parseDouble(decim.format(price));
    System.out.println(price2);

will print price2 using the default format. If you want to print the formatted representation, print using the format:

    String s = decim.format(price);
    System.out.println("s is '"+s+"'");

In this light, I don't think your parseDouble() is doing what you want, nor can it.

edited Dec 04 '12 at 07:20

Hardik Mishra

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answered Oct 20 '10 at 00:24

Tony Ennis

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also tried this and still not working – Bat_Programmer Oct 20 '10 at 08:47
It works for me. Post some example data and the results produced by the code above. – Tony Ennis Oct 20 '10 at 12:37
Hey thanks. the above code works perfect for me. I realized I was making a mistake by converting it to double again when actually I jus had t print it. Thanks once again. – Bat_Programmer Oct 20 '10 at 21:55

score 15 · Answer 2 · answered Oct 20 '10 at 00:13

15

Try this:

 DecimalFormat decim = new DecimalFormat("#.00");

answered Oct 20 '10 at 00:13

TofuBeer

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tried this and its not working.. – Bat_Programmer Oct 20 '10 at 08:47
This is the answer if your already working in doubles. I was sent on a wild goose chase with an idea to convert it to a BigDecimal but this is simple and works great. – ekerner Mar 11 '13 at 16:07
it doesn´t work :( – Jorgesys Mar 07 '18 at 23:00

Format double to 2 decimal places with leading 0s

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