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From: Josip Almasi <joe@vrspace.org>
Newsgroups: comp.lang.java.programmer
Subject: Re: Java blunders
Date: Mon, 28 Jul 2014 22:23:18 +0200
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Xref: csiph.com comp.lang.java.programmer:29404

On 07/24/2014 03:53 AM, Roedy Green wrote:
> On Wed, 23 Jul 2014 19:55:09 -0400, Arne Vajhøj <arne@vajhoej.dk>
> wrote, quoted or indirectly quoted someone who said :
>
>> But is it a problem in real world programming?
>>
>> I have never seen a problem due to this.
>
>
> The most common error is like this:
>
> out.println ( "the answer is " +
> a + b
> + ".");
>
> you must write that as:
>
> out.println ( "the answer is " + (a + b) + ".");

I think you guys missed worst thing with java concatenation, and it's 
got nothing to do with operator.
It's about how operator gets interpreted:

out.println ( new StringBuffer("the answer is ").append(new 
StringBuffer(a + b)).append(new StringBuffer("."));

It's three new objects, all synchronized.
OK I haven't read the spec for a while but that's it IIRC, spec requires 
it that way.
And if you want to avoid the garbage, you need to

StringBuilder shit = new StringBuilder();
shit.append("the answer is ");
shit.append(a + b);
shit.append(".");
and another line to get the string.

And bye bye code readability. Can I have strcat back please...
... err, with automated malloc/free if you please;)

Now, if || or some other new concat op solves that, I'm all for it.
Otherwise, I prefer +.

Regards...