Re: JDK 1.8.0_20 and JDK 1.7.0_67 released

From:
=?ISO-8859-1?Q?Arne_Vajh=F8j?= <arne@vajhoej.dk>
Newsgroups:
comp.lang.java.programmer
Date:
Wed, 20 Aug 2014 09:45:11 -0400
Message-ID:
<53f4a671$0$304$14726298@news.sunsite.dk>
On 8/20/2014 3:32 AM, Roedy Green wrote:

On Tue, 19 Aug 2014 17:32:32 -0700, Roedy Green
<see_website@mindprod.com.invalid> wrote, quoted or indirectly quoted
someone who said :

JDK 1.8.0_20 and JDK 1.7.0_67 were just released.

changes at
http://www.oracle.com/technetwork/java/javase/8u20-relnotes-2257729.html#newft


They redirected Collections.sort to ArrayList.sort. This broke one of
my programs. I had overridden ArrayList.sort, and Collections.sort
used my method rather than ArrayList.sort as it should to work.

The problem was fairly easy to fix, however I think it is the first
time a change in Java versions broke one of my programs.

The symptom was a stack overflow, with a circular call.


You should have taken the advice of Joshua Bloch and used
composition instead of inheritance.

Extending collection classes is almost never a good idea.

I don't think it is a coincidence that Joshua Bloch use a
collection class for illustrating the favor composition over
inheritance point.

Arne

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