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Re: "Double.toString"

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On Sunday, November 20, 2016 at 1:49:48 PM UTC-8, Lothar Kimmeringer wrote:
> Eric Sosman wrote:
> 
> >      I wouldn't say "prominent," simply because I don't use it much:
> > Whenever I want Java's string version of a double, I usually want it
> > in combination with another string.  So I write
> > 
> > 	System.out.println("\u03c0 \u2248 " + Math.PI);
> > 
> > ... and let Java fill in the toString() method call.
> 
> The resulting code being created by the compiler is quite
> more complicated with this rather than doing
> Double.toString(Math.PI). Your example isn't that bad, but
> the most common way to create a String from a double
>  myString = "" + myDoubleValue
> results in something like this:
>  myString = new StringBuilder()
>             .append("")
>             .append(String.valueOf(myDoubleValue)
>             .toString();
> 
> The number of objects being created is way higher than when
> simply calling Double.toString(myDoubleValue). I read about
> that in an article once and used the toString()-methods
> ever since (makes code more readable IMHO as well).

The number of objects created is very unlikely to present an issue. The `StringBuilder` will be GCed painlessly, and the HotSpot is likely to optimize away a whole lot of that anyway. Let's not panic about the negligible putative differences in performance and focus on clarity and maintainability of the source.

-- 
Lew

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Re: "Double.toString" Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-11-20 08:37 -0500
  Re: "Double.toString" Lothar Kimmeringer <news200709@kimmeringer.de> - 2016-11-20 22:49 +0100
    Re: "Double.toString" Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-11-21 08:25 -0500
    Re: "Double.toString" lewbloch@gmail.com - 2016-11-22 15:10 -0800
      Re: "Double.toString" Lothar Kimmeringer <news200709@kimmeringer.de> - 2016-11-24 14:07 +0100
        Re: "Double.toString" Arne Vajhøj <arne@vajhoej.dk> - 2016-11-24 11:12 -0500
        Re: "Double.toString" lewbloch@gmail.com - 2016-11-27 08:16 -0800
        Re: "Double.toString" Eric Douglas <e.d.programmer@gmail.com> - 2016-11-28 05:34 -0800

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