Re: C++ implementation of core Java API

From:

Lew <lew@lewscanon.com>

Newsgroups:

comp.lang.java.help,comp.lang.c++,alt.comp.opensource,alt.comp.freeware,comp.sources.d

Date:

Sat, 03 Nov 2007 10:21:04 -0400

Message-ID:

<DLidnUWisY1MHrHanZ2dnUVZ_hGdnZ2d@comcast.com>

James Kanze wrote:

garbage collection.) What you want to do is to "adapt" the Java
API to C++, taking what's good in it, and adapting it to the C++
idiom.

Roland Pibinger wrote:

That's the point. Adapt the Java API to C++ idioms. You can do the
same in C++ with pointers what you can do with references in Java. As
long as you don't try to copy the container the differences are minor.
Of course, in C++ you always have to take ownership into
consideration.

Some years back I worked on a multi-threaded C++ app. I wrote C++ versions of
Java's Thread and Runnable classes for it, based on a freely-available
pthreads library.

It turned out that it was tricky to get the semantics to match, in part
because a C++ reference (type&) is not the same as a Java reference. Also
tricky was to get Thread to be startable on its own or with a Runnable argument.

It turned out to be very useful to have a C++ equivalent to these classes. It
sure was simpler to use them than the raw pthreads lib.

There can be a distinct value to having Java-like libraries in C++. More
power to those who develop such libs; it ain't easy.

--
Lew