Sorry, I should've written this:

          Iterable<?> whatever = ...
          StringJoiner joiner = new StringJoiner(", ");
          whatever.forEach(w -> joiner.add(w.toString()));
          String s = joiner.toString();

-Pavel

On 11 Aug 2014, at 17:17, Pavel Rappo <pavel.ra...@oracle.com> wrote:

>       Iterable<?> whatever = ...
>       whatever.forEach(w -> builder.append(w.toString());
>       String s = builder.toString();

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