Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 5 years ago.
Improve this question
Hoping that anybody here knows about a good one: I'm looking for a (free to use) C++ library with a class hierarchy and methods resembling the Java API, with at least the I/O & networking part if it, specifically HTTP handling.
I work mainly with C & Java, but for this particular project C++ is recommended, so I thought of adopting a good set of C++ libraries without facing a steep learning curve.
Thanks in advance for any recommendation.
Qt is IMHO very java like. I.e. they prefer Java-Style Iterators over the STL ones. Qt includes networking (examples) and much other stuff (like scripting via javascript)
Have you looked at the Boost libraries?
Boost.IOStreams provides a framework for defining streams, stream buffers and i/o filters.
Asio - Portable networking, including sockets, timers, hostname resolution and socket iostreams.
Many others....
The Boost libraries provide similar capabilities as compared to the Java API, but they very much 'look and feel' - appropriately - like a C++ library.
There is also the option of using something like POCO, which is slightly simpler than using something like Boost, while still being cross platform.
While the only time I used HTTP in Java was a long time ago, the interface for the POCO library looks fairly simple to use. It gives a example of basic FTP usage a something like this:
Poco::Net::FTPStreamFactory::registerFactory();
std::ofstream localFile(inputFile, std::ios_base::out | std::ios_base::binary);
Poco::URI uri(inputURL);
std::auto_ptr<std::istream> ptrFtpStream(Poco::Net::URIStreamOpener::defaultOpener().open(uri));
Poco::StreamCopier::copyStream(*ptrFtpStream.get(), localFile);
A C++ library that looked like a Java one would be a bad library, IMHO. The two languages are so very different that what is good design for one will almost inevitably be bad design for the other.
You can take a look at Mindroid, which is primarily oriented to embeddded programming:
Mindroid is an application framework (with focus on messaging and concurrency) that lets you create applications using a set of reusable components - just like Android. The name Mindroid has two different meanings. On one hand Mindroid is a minimal set of core Android classes and on the other hand these classes also form Android's mind (at least in my opinion).
Related
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 7 years ago.
Improve this question
I appreciate this question may get closed due to its open-ended nature, but I'm curious none-the-less.
If I wanted to develop a cross-platform Web application using a statically-typed language, what would my choices be? I'm aware of Mono and Java, but what else is there?
(When I say cross-platform, I mean Windows and at least one common flavour of Linux)
You can use single language for the both client and server parts:
Java
C#
Google's Go
Scala
GWT(Java framework)
Haskell web frameworks
There are several high-performance Haskell web frameworks that emphasise strong static correctness:
snap
yesod
happstack
The goal is to lean on the type system to provide highly optimzied code, and zero chance of runtime failure.
To quote the Yesod web site:
Turn runtime bugs into compile-time errors
Yesod believes in the
philosophy of making the compiler your ally, not your enemy. We use
the type system to enforce as much as possible, from generating proper
links, to avoiding XSS attacks, to dealing with character encoding
issues. In general, if your code compiles, it works. And instead of
declaring types everywhere you let the compiler figure them out for
you with type inference.
If you mean statically typed, there isn't that much choice unfortunately. Google's Go language seems to begin growing into the web application space (there is Go support for Google's App Engine and projects such as GoWeb), but these efforts are probably not very mature yet.
Scala might be another possible option. While it also runs on the JVM, its web frameworks are very different due to the language's advanced features (see e.g. Lift) and might be worth a separate look.
In addition to Java and C# (via mono), you could also use (modern) C++ in the form of the
Wt (C++ Web Toolkit).
Now the C backwards-compatibility part of C++ is not strongly typed, but otherwise C++ programs are type safe.
If you want really strong type safety, you can use Haskell with Yesod. The goal of Yesod is to use strong types to prevent common errors in programming web applications. URLs, for instance, are type checked. You cannot construct an intra-application link without supplying the correct parameters. Escaping of user-content when rendering the web page is another situation where the Haskell compiler is used to ensure that strings are properly escaped before being included in a rendered page.
I believe Ruby is stongly typed, so Ruby on Rails be a good choice for this.
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 3 years ago.
Improve this question
Is there a Java equivalent of Python's "construct" library? I want to write "structs" like so:
message = Struct("message",
UBInt8("protocol"),
UBInt16("length"),
MetaField("data", lambda ctx: ctx["length"])
)
It doesn't have to specifically be a library with some sort of abstraction using the Java language. I mean, it could be a "portable" format, with an API for parsing the documents. I guess this could work out with XML, but it would be be a lot more ugly.
I realize I could just inter-operate with Python, but I don't want to do that.
I've looked a lot around and all I could find was Ragel (www.complang.org/ragel), that can also produce Java code.
It looked too complex for me so I've started some work to port Construct to Java.
I suspect it would be easier to make something like that in Scala, Groovy or JavaScript.
Construct on GitHub: https://github.com/MostAwesomeDude/construct
java construct: https://github.com/ZiglioNZ/construct
I've spent a couple of days on it, mostly looking for equivalents of python's expressive classes.
The most useful java classes I've found are: java.util.Scanner, java.util.Formatter and java.nio.ByteBuffer.
It's a big task so I want to focus on something small like creating simple parsers and formatters for ByteBuffers.
[Update]
I've ported enough code to parse and build some of the protocols that come with Python Construct, such as ethernet, arp and ipv4. Check it out at https://github.com/ZiglioNZ/construct
[Update: new Release]
Java Construct 1.1.2 is now available, see release notes.
You can use DataInput/DataOutput (and their implementations) to convert any set of values from/to a set of bytes. This doesn't give you an object where you can use names to access the individual fields, though - you would have to create such yourself.
It depends a bit on what you want to do - do you have a fixed data format to send/receive on wire, or does this vary from time to time?
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 7 years ago.
Improve this question
Theoretically this seems possible to me. So can Any one confirm this to me, if it's possible? and if there is such a software that does this?(like Java to C++ or C#)
And in general would it be possible to transfer languages like Java to server-side programing language like PHP?
Translating the syntactical elements of one language and producing another is not trivial but it's not impossible. A good parser can build syntax trees in one language and then emit another. The difficulty of porting code outside the context of simple "Hello World" type applications is twofold:
The libraries of one language will probably differ (e.g. WinForms vs Swing)
Some language features will have to be catered for: (lambda expressions, anonymous methods, different inheritance implementations etc).
It is possible, but the major problem is that Java has a very large runtime library which needs to be made available in the target language in order to be able to do a fully automatic conversion.
For the special case of Java -> .NET, you can use J# from Microsoft to compile it into a .NET assembly which can then be used. Also ikvm.net allows for running a JVM inside .NET.
For PHP I do not believe such a solution exist. You MAY be able to use gcj to create a native library which can be linked in, but I do not believe it is a feasible soultion.
What functionality do you need in PHP?
Visual Studio ships with a Java to C# translator, and even tough it does a pretty decent job, there's still a lot to clean up afterwards.
In my experience you really have to ask yourself if it makes sense to translate code from one language to another. What is the gain? Will the translated code be maintainable? If the answers to these questions point in the wrong direction, translating is probably not the right approach.
Google Web Toolkit does conversion from Java to JavaScript:
http://code.google.com/webtoolkit/overview.html
to answer your question, yup, theoretically this is indeed possible and practically such technology is used every day :)
The interesting thing, in my opinion, is that the Java converters typically convert by taking the bytecode, not the source code. Then it's, say, bytecode-to-ObjectiveC source code. For some converters (at least one opensource one) it's bytecode-to-XML then XML-to-target-language.
For example, the Uniwar application for the iPhone, which has been acclaimed by all and made its way to the appStore's top ten, as been written in Java (JME) and automatically converted from the Java bytecode. Reaching the top ten, even for a few days, means that this is deployed on a lot of machines ;)
In the Real-World [TM], Cobol-Java and, weirdly, Java-Cobol are not unheard of.
For all this to work that said you need a really good converter :)
Theoretically it is possible. But as others pointed out the main problem is to translate libraries.
Some time ago I made Java to Tcl(XOTcl) and Java to Python translators to evaluate the translation posibility. Search by java2tcl and yava2python.
They convert syntax but do not make relevant constructions translations (e.g. Java file operations to Python ones). That would require more development time.
In general my opinion is what such a translation may be possible. But only if your translator covers classes/libraries of the converted project.
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 6 months ago.
Improve this question
Here are my current options.
.Net : Using WPF, Visual C#, SQLServer
Java : Using Spring, Hibernate, Enterprise DB, web-based
Can you suggest which one is better?, especially with regards to building complex forms.
Wow, .NET vs. Java, can't wait to see how this turns out ;-)
.NET might have the edge here with WPF and click-once deployment. WPF is in its second version and is showing itself to be quite powerful and easy to use. It provides excellent separation between logic and presentation (in XAML). Personally, I would much prefer a Windows application to web deployment because the programming model is so much more powerful and versatile (and better suited for complex forms).
I won't try to represent the Java viewpoint here, but Windows forms development in Java does not have a great reputation. Perhaps its unwarranted, I'd be interested to hear what Java programmers have to say. (UPDATE -- Swing is the technology I'm referring to here)
To some extent, this is a false choice, because those other technologies you list (Spring, Hibernate) are also available on the .NET stack (Spring.Net and NHibernate) and are quite mature. Most popular Java open source technologies have been ported to the .NET stack.
From that criteria flip a coin or use the one you know, for forms and basic applications they are basically the same.
If you are doing small business accounting software look at something like Peachtree of Quickenbooks, they have some level of customization. If you are doing medium to large company look at something like Netsuite or SAP, they have alot of customization.
.Net is better. Java runs slowly on client machines. Java is best for server oriented tasks.
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations.
Closed 5 years ago.
Improve this question
We are developing a middleware SDK, both in C++ and Java to be used as a library/DLL by, for example, game developers, animation software developers, Avatar developers to enhance their products.
What I would like to know is this: Are there standard "Best Practices" for the development of these types of API?
I am thinking in terms of usability, readability, efficiency etc.
My two favourite resources on the subject: http://mollyrocket.com/873 and http://video.google.com/videoplay?docid=-3733345136856180693
From using third party libraries on Windows I've learned the following two things:
Try to distribute your library as a DLL rather than a static library. This gives way better compatibility between different c compilers and linkers. Another problem with static libraries in visual c++ is that the choice of runtime library can make libraries incompatible with code using a different runtime library and you may end up needing to distribute one version of the library for each runtime library.
Avoid c++ if possible. The c++ name mangling differs alot between different compilers and it's unlikely that a library built for visual c++ will be possible to link from another build environment in windows. When it comes to C, things are much better, in particular if you use dll's.
If you really want to get the good parts of c++ (such as resource management through constructors and destructors), build a convenience layer in c++ that you distribute as source code that hides away your c functions. Since the user has the source and compiles it locally, it won't have any name mangiling or abi issues with the local environment.
Without knowing too much about calling c/c++ code from Java, I expect it to be way easier to work with c code than c++ code because of the name mangling issues.
The book "Imperfect C++" has some discussion on library compatibility that I found very helpful.
The video from Josh Bloch mentioned by yrp is a classic - I second that recommendation.
Some general guidelines:
DO define your API primarily in terms of interfaces, factories, and builders.
DO clearly specify exactly which packages and classes are part of the API.
DO provide a jar specifically used for compiling against the API.
DO NOT rely heavily on inheritance or the template method pattern - over time this becomes fragile and broken.
DO NOT use the singleton pattern or at least use it with extreme caution.
DO create package and class level javadoc explaining usage and concepts.
Take a look at Framework Design Guidelines. I know it is .NET specific, but you can probably learn a lot of general information from it too.
There are lots of ways to design apis, depending on what you are solving. I think a full answer to this question would be worthy off a whole book, such as the gang of four patterns book. For Java specifically, and also just OO programming in general, I would recommend Effective Java 2nd Edition. The first is general and a lot of popular programming patterns, when they apply and their benefits. Effective Java is Java centered, but parts of it is general enough to apply to any programming language.