Re: Clean way to write Double into String without the trailing ".0" ?

Knute Johnson <>
Mon, 21 Dec 2009 13:27:29 -0800
On 12/21/2009 12:56 PM, abc wrote:

Easy newbie-question here for the experts:

What's a clean way of writing a Double into a String, avoiding
the ".0" at the end ?

The Double.toString() method insists on appending a decimal fraction
".0" no matter what, and I only want the fractions to show up if they
are non-zero.

I found a dirty workaround (see code below), using a regex to remove the
trailing ".0", but there has to be a prettier way to do this.

String s = Double.toString(x);
s = s.replaceAll((String)"\\.0$", "");


public class test {
     public static void main(String[] args) throws Exception {
         Double d = new Double(666.234);

C:\Documents and Settings\Knute Johnson>java test


Knute Johnson
email s/nospam/knute2010/

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