Java 1.5 vs C#

SexyFingers writes "Sun released Java 1.5. The non-API stuff that they've added made it finally "catch-up" with C# - since both languages are built to support OOP from the ground-up, their constructs become almost identical as additional OOP "features" are supported. So if you're doing C# and your foundations in OOP are rock-solid, there really isn't any difference whether you're coding C# or Java."

Here's the list of enhancements to the Java Language:

1. Generics (C# 2.0 already supports this)
2. Enhanced For-Loop (the foreach construct in C# 1.0, duh!)
3. Autoboxing/Unboxing (C# 1.0 already has this, everything is an object, even the primitives - not really, but they do it so well...)
4. Typesafe Enums (again C# 1.0 already implemented this, but I think they've added a little bit more twist in Java, that its actually a better implementation)
5. Varargs (C# 1.0's params construct, ellipsis construct in C++)
6. Static Import (I don't know if C# 1.0 has this, or C#2.0, but C# has a construct for aliasing your imports - which is way cooler. Static Import, actually promotes bad coding habits IMHO)
7. Metadata/Annotations (this is C# 1.0's Attributes, Sun's upturned noses just gave it a fancier name - also, C#'s implementation is better and more intuitive)

They've beefed up the API some, and integrated several packages with the regular JSDK that used to be a part of a separate package or installation ---in my NSHO, the Java API has become bloated...

At this point (even before Whidbey) the deciding factor (as always) for Enterprise work, when choosing a language platform, should be the support it has behind it, in terms of IDE, tools, api, and longevity of the vendor pushing it (forget the OpenSource crap argument, those guys are too in love with Perl, Python, and Ruby - Java could become the child nobody wants to talk about if Sun dies) - right now that's C# and the .NET Framework ---

If you ask Paul Graham though, both language would be utter crap and fit only for idiots :) http://www.paulgraham.com/gh.html [I'm exaggerating, so hold off on those flames.]

Comments

I code C# for a living

[carpe_noctem]

...and let me tell you, java doesn't have to do that much to "catch up" to it.

Re:I code C# for a living

[carpe_noctem]

Maybe I just don't grok OO design, but the whole language is really abstract. Nothing seems to tie together to anything else in any sort of logical fashion, and it takes hours to figure out how anything works.

Meh, that's just my take on it. And it would appear that my opinion is officially modded "troll". Oh, well. =/

Re:I code C# for a living

[Westley]

So if you find C# abstract, where *exactly* is Java better, as a language? Or were you actually comparing the libraries? (Which bit of C# itself took hours for you to figure out?)

Personally I find them reasonably equivalent, but C# has a few advantages (properties, delegates, events) and the .NET library has had fewer iterations so is less internally inconsistent than the Java libraries at the moment.

Re:I code C# for a living

[LnxAddct]

I code in java on the side for some small business apps. I've also coded in C# and have used all of the MS Visual Stuido nonsense. Both languages are at a level that you can do just about anything with one that you can do with the other. So the deciding factors come down to really which is a better platform to develop on and cross platform compatibility (in some cases the latter isn't an issue, but it is for me). As far as IDE's go,I don't get what people like about Visual Studio, especially VS.net. I enjoyed VS 6.0 much better the VS.net, regardless I have since moved to a strictly open source platform and only use Windows for testing. When I did do C# coding, I preferred using vim or Sharpdevelop. I really can't stand VS.net. Anyway, Java, imho, has superior IDEs (some may argue that IDEs reinforce bad programming, etc..., but if used *correctly* they can significantly increase productivity) Eclipse puts Visual Studio to shame in many areas. Eclipse is an amazing IDE and made programming fun again. Another great IDE for Java, that puts great focus on GUI dev, Web App dev, and Mobile phones, is Net Beans. Both IDEs have very nice integrated features with a great tool selection and good plugin frameworks. I use both interchangeably depending upon specific tasks and projects. So in my oppinion as far as having a good platform to work on, Java is superior. Next is cross platform compatibility. Although Mono is making leaps and bounds, Java wins hands down on this. It gives my customers more options and major open source software foundations like the Apache foundation actively work on many java based enterprise applications. This allows my customers to also have low start up and implementation costs.No real need for further discussion on that. Another area where I prefer java is for distributing applications via WebStart. It makes life very easy, in many areas including maintenance and deployment. This is just my 2 cents. I don't really see why anyone would use C#, I mean they took Java and improved, and now Java has taken both its past and C# and improved itself :/
Regards,
Steve

Re:I code C# for a living

[gooser23]

Granted I've only used a few IDEs (VS6, VS.Net2002, VS.Net2003, Tornado for vxWorks, Xcode, Kdevelop & ddd), but of all VS.Net is cleanly the easiest to get things done in overall.

I did not find Kdevelop or ddd particulary more useful than vi other than having been weaned on VS6 I am simply more comfortable with a GUI than a tty.

Xcode does every part of project management and structure more correctly than VS in my opinion. The idea that your source tree is separate from your targes and that your targets are separte from your executables just makes sense. There's a lot less special cases this way.

Tornado for vxWorks (ver 2.2.1 IIRC, its been some time since I used it) is a poor copy of VS6 -- possibly more correctly VS5 or 4, but I've never used those. The one thing that Tornado got right is the remote debugging (e.g., you build a vxWorks system, load it onto your embeded system, and you can debug through your app via ethernet, serial port, or a local pci bus). In fact, without the remote dubugging I would have considered Tornado to be utterly useless.

The things that set VS apart is its build styles and debugging features. Xcode could catch up on the both of these (esp. the build styles), but I'd say gdb has a long way to go to be on the same leve als VS's debugger. Its really nice to be able to add new code, change existing code, and arbitrarily set the execution pointer. Really the 'advanced feature' I've figured out how to replicate on gdb is changing a variable's value, but even this feels rudimentary to how in VS you can arbitrarily change the contents of memory directly.

So, in short, what I like about Visual Studio is its build styles and debugging capabilities. But I do think Xcode 1.5 is better thought out, just not as polished in these two areas.

I should add that all this does not apply to any APIs of the aforementioned products, in which I would agree with you (having used MFC, ATL, COM and WIN32), I don't see why informed person would choose these over the alternatives (wxWindows, stl, boost, Cocoa) if they had a choice.

Re:I code C# for a living

[iezhy]

Java has checked exceptions

exception management in c# is so painful without them

Re:I code C# for a living

[swilver]

Seriously, I tried most of the IDE's you mentioned and then some, but Eclipse just blows them all away. The fact that it builds a complete syntax tree of your project which can basically be queried in any way you see fit makes refactoring so easy. It can rename method calls for an entire project, add new parameters, reorder parameters, change return code, display what methods call what method in tree form (especially if you suspect the code is dead), displays lots of very useful compiler warnings (unused parameters, variables, methods, unneeded casts, often surprising how many you can find of those in non-Eclipse projects and the possible subtle bugs they introduce). That's just scratching the surface really... it's very evident that Eclipse was written by programmers for programmers, and even after using it for more than a year it still manages to surprise me :)

Re:I code C# for a living

[Three Headed Man]

Every time I see "C#" I always think of a funny comment from a poll, maybe 6 months back, of "What do you call #?" The options given were "Sharp, Hash, Pound, Channel, Tic-Tac-Toe sign" etc. The funny comment was "I call it the 'rap' sign. You know, as in C#"

Re:I code C# for a living

[cakoose]

C# vs Java, mostly a tie (c# good: ref and out parameters, indexers, foreach; c# bad: properties, operator overloading)

While 'ref' paramters are debatable, 'out' parameters are stupid. They should have created a way to return multiple values from a function. Allowing first class tuples would have been the correct way to do this (in most C-style languages, tuples are allowed as arguments to functions and disallowed everywhere else). Adding tuples would also have eliminated the need for the hacked up delegate functionality. Then again, Java doesn't have any equivalent functionality, so it could be seen as an advantage for C#.

Operator overloading is a good thing. It can be abused, but so can anything else. Removing operator overloading doesn't even come close to making it impossible to write obfuscated code. There are many situations where operator overloading makes things a lot simpler.

Properties are also good. Instead of identifying them through string matching ("get*", "set*"), language-level support for properties allows more accurate data type modelling. In the end, however, the CLR doesn't really have true support for properties. They implement them as methods (like Java, except at a lower level so most programmers don't have to care about it). This implementation mistake resulted in different opcodes for field access and property access, which means you cannot switch between fields and properties without changing the class's public interface (and breaking binary compatibility with client code). It's still better than what Java does...

Function pointers and anonymous functions. This has got to be the biggest improvement over Java. Unfortunately, class libraries were already designed before the anonymous function feature so they probably wont be designed to take advantage of it. Also, VB and C++ are probably holding things back because, as everyone knows, "language agnostic" is just a euphemism for "lowest common denominator".

You also forgot generator functions. They make it easier to write pull-style classes (a "pull" XML parser, for example). Though it isn't as powerful as full-blown continuation support, I think it'll still be useful for many coding tasks.

C# has more comprehensive generics support (aside from variance). Though both languages made the mistake of allowing arrays to be fully covariant (ArrayStoreException), Java got screwed when they decided not to maintain dynamic type information for generic type parameters. This limits the use of generics in often confusing ways. Type erasure isn't a problem in languages that have a good enough type system to avoid resorting to dynamic typing (like ML or Haskell). But C# and Java do not have good enough type systems and the C# people recognized that and chose to keep the dynamic type information around.

C# is better than Java in almost every way. Java has better enums and support for covariant and contravariant generic type parameters, but that's about it.

Re:I code C# for a living

[GCP]

And I was a member of one of the JCP expert groups that brought you Java 5.

java doesn't have to do that much to "catch up" to it.

Stated another way, Java 5 is still behind C#, to which I would agree.

As to how far behind, that depends on what you value. Java's event handling/callback design is atrocious compared to the convenience of delegates. I would much rather pass a single method called OnAccountOverdrawn()to the event notifier than the Java style of making the whole class an instance of some interface, implementing stubs for all the useless methods of the interface, then implementing the one useful method--which will have a useless name like DoAction() that you can't change, then passing the object that contains the DoAction() method to the event notifier.

And for many things such as generics, autoboxing, enums, etc. (I don't recall which ones specifically), there are actual semantic differences in the virtual machine for C#, whereas Java's knockoff versions are just syntactic sugar for the writing out the equivalent source code yourself. I AM in favor of syntactic sugar, but having the actual semantics available in the underlying runtime gives you additional advantages.

Java's great advantage is its ubiquity, which is also an impediment to improvement. Sun's position was that it was pretty much finished with language improvements after Java 1.1 and would thereafter concentrate on libraries that would run on existing JVMs. New JVMs might run the code even better, but the old JVMs would still run it.

Microsoft knew they had to do better, or nobody would switch. They did a lot of things better, and they seem committed to doing more, even if it means obsoleting their existing VMs. They have far more control over The (One) Platform and seem quite willing to make improvements to C# and the other .Net technologies that will require a VM upgrade.

One catgegory of improvement they seem interested in is a way to make dynamic languages, like Python or Lisp, work REALLY well. Another is support for functional languages like Haskell or OCaml that have special needs of their own.

And if they do it well, (my speculation now), they could even add some of the attractive features of those languages, languages I like more than C#, to C#, widening the gap with Java.

Java might have a very hard time keeping up with C# improvements while anchored to existing runtimes, and letting go of the anchor would seriously impact its ubiquity, which is one way in which Java is vastly better than C#.

I don't think it's a given that Java is going to catch up to C#. But if Mono and/or DotGnu don't succeed, it may not matter as Windows fades away (which I believe it will).

Re:I code C# for a living

[angel'o'sphere]

For covariant and contravariant exist several definitons depending on context (inheritance versus template parameters, e.g.)

Suppose you have a class like this:

class A {
A method() { return new A() }
}

And another class like this:
class B extends A {
B method() { return new B() }
}

This construct is called covariant. The class B is ingeriting from A, while the method method() is overwritten in B. Not only is the mthod redefined but also the return value is. As it is redefined to the taype of the class, this is called covariant.

If the method in A would return a B and the method in B an A, it would be called contravariant.

For template parameters there are similar definitions, but they are a bit more complex.

angel'o'sphere

Varargs?

[American AC in Paris]

That sounds like it should be some Adams-esque race of semi-competent space pirates...

All in it together

[Doc Ruby]

How about a cross-compiler that takes advantage of this vendor competition in cooperation to combine both communities of programmers into one pool targeting either virtual machine?

Re:All in it together

[jungd]

ikvm.net ( http://www.ikvm.net ) is a java VM for .NET/Mono that uses classpath for the JDK API. It can also statically cross-compile java bytescodes into IL code. For example, you can compile a .jar into a .dll (even the resources are preserved).

Re:All in it together

[VertigoAce]

J# sounds a lot like the second option. It is sort of like coding in Java but using the .Net framework. It's not really intended for anybody to start new projects with, but instead as a stepping stone between Java and C#.

Re:All in it together

[mortenmo]

Trust me, we looked at that one. The "tool" can only be used in extremely simple circumstances and is not much more than a marketing trick from Microsoft.

I'm confused

[abrotman]

Where's the story? Or is this just one person's interpretation of Java vs. C#?

Learn to write?

[Palshife]

I've never seen so many grammatical errors. You win.

Re:Learn to write?

[American AC in Paris]

Don't think of it as loaded with grammatical errors. Think of it as Compiled with (0) errors, (472) warnings ...

what about...

[syrinx]

and you're foundations in OOP is rock-solid

What about our foundations in English?

Re:what about...

[yoyhed]

You missed another:

and you're foundations in OOP is rock-solid

Come on, people. Conjugate.

flamebait

[Bert690]

It's times like this when you'd REALLY like the ability to mod the story itself as troll/flamebait!

At this point (even before Whidbey) the deciding factor (as always) for Enterprise work, when choosing a language platform, should be the support it has behind it, in terms of IDE, tools, api, and longevity of the vendor pushing it (forget the OpenSource crap argument, those guys are too in love with Perl, Python, and Ruby - Java could become the child nobody wants to talk about if Sun dies) - right now that's C# and the .NET Framework ---

Re:flamebait

[oniony]

Fully agree. The guy doesn't know what he's talking about. Java has much more support in the industry, .NET in the enterprise is currently painful. The tools are barely usable (Visual Studio debugger on a large application, anyone?) plus he makes some fundamental errors in the list. .NET does not support auto-unboxing for example (at least not .NET 1.0 or 1.1).

Re:flamebait

[jeif1k]

.NET in the enterprise is currently painful.

It's not about the enterprise, it's about the desktop. Microsoft had to do something there because C++ and MFC and COM was seriously getting in the way of getting the job done. Java isn't even trying to compete seriously on the desktop, so C# wins by default on the desktop. And (crazy as those people may seem to you and me) Microsoft desktop application developers actually seem to like Visual Studio. If Microsoft can additionally win market share from Java in the enterprise, that's icing on the cake for them.

Re:flamebait

[mrogers]

Large applications written in Java are bugs. ;-p

Cue the zealots on both sides

[JUSTONEMORELATTE]

Why again can't I mod a story as -1 Flamebait?

--
I'll pay you $10. Really.

Java 1.5 vs c# 2.0?

[hpj]

It's a bit unfair to compare the new Java 1.5 release with c# 2.0 since c# 2.0 is not due to be released until sometime Q2 or Q3 next year. But I do agree that before the 1.5 release Java had a lot of catching up to do to c#, but now c# is a bit behind (Mainly because of it's lack of support for generic classes which Java now supports).

Re:Java 1.5 vs c# 2.0?

[Anonymous Coward]

Comparing an unreleased version of C# to the available version of Java is just stupid. Further, with no mention of the provided API any discussion is a waste of time. While JAVA offers a bloated API, it is extensible and great for programming, unlike dot NET 1.1 which seems to be an attempt to build OO on top of a procedural framework that doesn't provide the programmer with the same level of flexability. The other thing to consider is that dot NET means normally a purchase of Visual Studio, while JAVA normally means a free download of the JSDK and JCreator. Also IMHO Java doc is much better then the stuff that comes with dot NET. The rest is rant......

Comparing a released software product that is available almost for free to an unreleased product that costs hundreds of dollars is just dumb. Where is the story here?

Re:Java 1.5 vs c# 2.0?

[swilver]

C's implementation of abstracting machine code is just a compiler hack, the underlying machine code has not changed. The only benefits are some compiler errors and warnings and not performance and storage efficiency that real machine code can offer.

Seriously, I couldn't care less about better performance. I care about being able to avoid probably 75% of all casting that goes on in our 10.000+ source file project and being able to specify our API even tighter and catch more problems before it hits our customers.

I just wish Sun had done this 3 years ago, but better late than never.

What Language

[jcook793]

What language was this post written in? Amazing.

I want functions

[Tablizer]

I want actual functions, not "activity objects". Almost everyone, except for the extreme OO zealots, agree that OOP is not necessarily the best approach to every problem.

Too bad we can't mod articles

[MojoRilla]

This would get a -1 Flamebait.

My feeling is that these features are good news. There should be no gloating on the part of C#, it was clearly built on Java's coattails.

Competition is a great thing, ain't it?

Re:Too bad we can't mod articles

[Slime-dogg]

I wouldn't give Java the credit for C#. If anything, it was Delphi that C# was built upon. The only thing that C# "borrowed" from Java is the idea of a VM, and even that functions in a different way than the Java one.

Why is there a C# advertisement on /.?

[Cloudgatherer]

Seriously, this looks like an ad for C#, a bunch of claims with very little support/evidence for those claims.

I've worked on C# and Java projects. As far as I'm concerned, C# = MS Java. MS could not control Java, so they abandoned support for it and built thier own "version." It's really a rinse & repeat cycle for MS: see successful software, build own version of said software to try to take over that market as well.

Corrected URL

[waynegoode]

The first link does not work. For the few who might not notice that the problem is the extra / at the end, thep link should be this.

Perhaps /. will correct the error. I emailed the editor when the story was in preview, but it was too late.

I call bullshit

[The Bungi]

There is no apparent point to this "story". It's full of grammatical errors and obvious flamebait arguments (flamebait in the context of the slashbot groupthink). What, "C# is teh roxx0rz and Java.. well, I forgot teh point I was makeing for Java"? "The open source crap argument"? Way to go.

Here's my theory. Along with the ubiquitous slashvertisements and the Microsoft-bash-of-teh-day barrage posts, these are a perfect opportunity to create a story that will generate 1,000+ comments and ten times those many page views and ergo ad impressions.

C'mon, C# vs. Java? Outside of "RIAA sues 86 year-old grandma", "We hate Bush, let's talk" and "Microsoft patents KDE" there is no better source of inflammatory material in the dorkosphere.

Sad, really.

the crap argument

[iamchaos]

Is this article flamebait? Maybe I am just misunderstanding when he says:

"At this point (even before Whidbey) the deciding factor (as always) for Enterprise work, when choosing a language platform, should be the support it has behind it, in terms of IDE, tools, api, and longevity of the vendor pushing it (forget the OpenSource crap argument, those guys are too in love with Perl, Python, and Ruby..."

Which "crap" argument is he talking about? I assume he means that when using those languages you have thousands of directions to go for help in howtos, docs, tutorials, books and of course the loving #perl. I normally would not reply to something like that, but I took offense. Yes I love those languages. They all have strong points and make life fun when coding. I have support and have never had to rely on a company to provide said support. Oh yeah, and I write enterprise software with the mod_perl crap everyday of my life. Thanks.

iamchaos

Version

[xPhoenix]

So which version number is it? Java 2, Java 1.5, or Java 5? Someone should teach these guys to count before they start coding!

Re:APIs

[Palshife]

XML Parser

You mean like JAXP and JAXB?

Mistake

[ajs]

I'm not pleased with the "catch-up" game that Java is playing here. Java was a fairly nice middle-ground betweeen high and low level programming, and what appears to be an effort to become a high level language is rather ominous for those who are interested in testability and performance in Java.

This, BTW, is why you don't want your language to be controled by a company which in turn has a marketing-driven bottom-line. The idea that two languages could co-exist with different target audiences is nonsense to marketing droids, but perfectly reasonable to someone like Guido van Rossum, Larry Wall or any of the other maintainers of truly open-source languages. Open source isn't the only way to maintain this focus, but in today's marketing-driven world, you aren't likely to see too many Bell Labs-like organizations putting out languages like C (which was semi-open source, as was Unix). Java and C# are probably much more typical.

Re:Mistake

[Sanity]

Java was a fairly nice middle-ground betweeen high and low level programming, and what appears to be an effort to become a high level language is rather ominous for those who are interested in testability and performance in Java.

Generics improve testability because they largely eliminate runtime ClassCastExceptions. I haven't seen any evidence to show that any of these features impose a performance penalty. Most just make the developers life easier by saving them from repeating common code patterns.

This, BTW, is why you don't want your language to be controled by a company which in turn has a marketing-driven bottom-line.

Yeah, because hardly any companies are driven by their bottom lines...

Re:APIs

[SnapShot]

I use DOM within XML as well as the MessageDigest using the MD5 algorithm every day. So I'm letting you know...

Or, is your complaint based on the fact that the libraries that underlie the XML and Security algorithm API's can be swapped out? To me, that's a feature not a bug but YMMV.

AVP

[pizza_milkshake]

It's just like Alien vs. Predator:

whoever wins, we lose.

Re:Sounds a lot like religion

[jayminer]

I code C# for a living, so according to your definition, sold (or more appropriately rented) my soul to the devil. (This does not change the fact that I personally prefer free/open source technology. My PDA, my media players, my home operating system are all free/open source based.)

Java is not any more closer than C# to open source technologies. Sun doesn't like open source, just as Microsoft.

It's a very well known fact that Java has been a base (or in other words "the" figure) for Microsoft while developing C#, but that does not imply that "Java is good, C# is bad" or vice versa.

I would be happier personally to code in Java, but professional life yields to disqualify who resists new technology.
Your choice of programming language is not your religion, and it can change continuously through your life. Just like your operating system.

IIS vs J2EE Servers

[knitterb]

It's not so much the language that is a question of contest, but the platform they run on. I've done Java programming since 1.1.8, and have deployed on Tomcat, Resin and Weblogic.

Recently I switched to C# (new job) and I have to tell you, the language is pretty neat with some of the tricks you can do. Nothing ground breaking though.

What's really missing is the platform for release, and release management. Where are WARs and EARs for .Net? What the fuck is up with IIS (oh yeah, it's crap)?? Where is any sort of replicated server side session management (no, long ass hidden fields are *not* sessions - and a M$SQLServer *only* solution doesn't count).

The constructs and tricks of a language can be debated as long as you want. You will probably find something nice in every language. But when you have to [operationally] deploy any application, great or not, on some cheap as shit, crap ass, hard to manage, non-repeatable platform such as IIS, that's when the real rubber hits the road with Java.

J2EE deployment platforms are light years ahead of .Net's deployment platform (singular). Man I miss working with J2EE platforms and loathe IIS...even though it is my job to keep all this stuff running on IIS! :(

Re:IIS vs J2EE Servers

[eakerin]

SourceSafe is free with VS and will be even better integrated in Whidbey.

He wasn't talking about source code management, he was talking about deployment packages.

In the Java world with your Servlet engine, you drop a war (which is a glorified zip) file in a given deployment directory, and the engine unpacks it, and brings the app online. That's your entire process for deploying a simple app. It includes your web pages, classes, libaries, base config, etc.

SourceSafe may be free, but my biggest complaint with it is it's poor branching, lack of proper security, and non-client-server access menthods.

I've recently switched the windows developers at work to CVS, and had them install WinCVS and TortoiseCVS. WinCVS handles the hard stuff that you do very rarely. TortoiseCVS handles the everyday stuff. It ties into Explorer and My Computer (and other file browsing areas) and allows you do normal SCM operations (checkout, update, commit, tag, branch, diff, log, etc) right from the file browser.

It's a nice package to try out if you've never seen it. CVS has it's own problems, but they're pretty easy to watch out for. Once the windows tools for subversion get a little more time under them, I'll probably end up switching our repositories over to it, for the renames, repository-wide version, and O(1) tagging/branching.

Important differences between Java and C#

[daveho]

While neither Java nor C# is truly free of being controlled by an Evil Corporation(tm), Java at least has multiple vendors, runs on a wide variety of platforms, and has an open standardization process.

Maybe I'm an oldtimer, but...

[Tony]

C'mon, C# vs. Java? Outside of "RIAA sues 86 year-old grandma", "We hate Bush, let's talk" and "Microsoft patents KDE" there is no better source of inflammatory material in the dorkosphere.

Oh, how I pine for the days of vi vs. Emacs.

- Tony

With C#, stuck in windoze

[JPyObjC Dude]

so if you're doing C# and you're foundations in OOP is rock-solid, there really isn't any difference whether you're coding C# or Java.

He kind of forgot that there are many programmers and customers who DON'T want to deploy their systems on win32. With Java apps, you don't have to. In fact you can choose almost any operating system and hardware. Anybody who chooses C# over Java for enterprise deployments is truly a MicroWeenie.

I much prefer my 8 processor HP UX box any day :]

Re:With C#, stuck in windoze

[pesc]

You are right. One main feature that Sun designed for Java was WORA (Write Once Run Anywhere). M$ thought this sucked. They tried to destroy that feature and got sued over it. So the invented C# instead. C# isn't WORA, it is WORM (Write Once Run on Microsoft). With C#, you are locked in again. That's the whole point with C#.

Re:APIs

[AKAImBatman]

Let me know when stuff like an XML Parser and MD5 are native in Java.

They ARE.

XML package
MD5 and SHA support

The former has been in Java since 1.3, and the later since 1.1(!).

Honestly, Java has every feature and the kitchen sink in its core APIs. And if a feature isn't there, it's very easy to write a library to add it. That's why programmers like Java so much.

Any other features you'd like me to find for you?

"One Person"... "One C# Developer"

[Black-Man]

opinion. broken link... poor grammar... this guy is a joke. He pulls out 7 new features!! What about built-in queue support?

Only thing I agree with is generics has been long overdue.

Java C# porting - Lucene as example

[otisg]

It is this similarity and 'compatibility' of Java & C# that is now making it easy to port various applications between the two languages. For instance, the very popular Lucene (Information Retrieval library from Jakarta (i.e. Java)) has a very solid .Net port written in C# called dotLucene. The Lucene -> dotLuene port is fairly automated, it appears, which allows developers of the .Net/C# port to keep up with the original software written in Java.

If C#/Java continue in this direction, I think we will see many more applications that have parallel versions in the two languages.

See:
Lucene
dotLucene

Re:Flaws in both Languages

[scovetta]

You use PHP/Perl on a server? For something other than adding phpbb to your homemade website? Sorry, but PHP/Perl serves a purpose, and so do Java/C#, and they two are almost mutually exclusive.

For enterprise-grade web-applications (not hacks), it's .NET or Java. For real applications, it's either .NET, Java, or C++.

End of story. Don't argue with me, just accept it.

Limitations of Generics in Java.

[miguel]

There are some important limitations of generics in
Java, which are properly addressed in C#.

For more details, you might want to read:

http://www.artima.com/intv/generics.html

C# still has a few extra niceties like properties,
events, delegates, anonymous methods and iterators.

Miguel.

Re:Flaws in both Languages

[nat5an]

Who modded the parent up? The post is woefully inaccurate.

1. What exactly does it mean if a language is "open source?" Surely, the specification is available for free. If you wanted to, you could write a lexer/parser/compiler without paying anything to Microsoft/Sun. Do you mean that the tools provided by the companies aren't open-source?

2. C# doesn't "require" a virtual machine any more than Java "requires" a virtual machine. One could write a native compiler for both. Additionally, in fact, Microsoft's .NET implementation does just-in-time compilation of the .NET assembly generated by the C# compiler (the bytecodes, basically), so it doesn't actually run inside of a virtual machine, nor is it interpreted. Since Sun's javac is supposed to generate portable bytecodes to run on different architectures, they decided to use a VM to avoid having to write a thousand different JIT compilers.

Neither of these are inherent weaknesses in the specifications of the languages, they're implemetation details. Since this story is supposed to be about new language features in Java, I don't see how bitching about Microsoft/Sun's implementations is really relavent.

Re:Flaws in both Languages

[X]

Let's take these one at a time here:

Neither is open source. Languages can't be classified open source, because they aren't programs. Certainly both languages have non-open source implementations, but they also have open source implementations.

Both require virtual machines. Well, I guess it depends on what you mean by a virtual machine. Technically even the C runtime is a virtual machine. That being said, both Java and C# can be compiled to native code, bypassing the need for the JVM/CLR.

Despite being marketed as portable, but have portability issues. ROTFL! Yes, perfect portability isn't possible. However, both languages are amazingly portable considering their extensive feature sets.

We don't really need them. Really, when you think about it, we only really need C. PHP/Perl/C++/Python are really all flawed languages as a consequence. ;-)

They're closely tied to their respective companies. This is more of a perception problem than a reality problem. I can do development in either language without getting involved with either company.

Re:Only Microsoft

[teromajusa]

"For my own opinion I prefer unchecked exceptions as the code is far cleaner. "

No, the code will just appear cleaner. Hiding exception propogation is an invitation to ignore exceptions. If someone wraps code in a single catch, you can at least see where they've been sloppy. The equivalent in a non-forced exception check is to do nothing, which is invisible.

Ravioli Code

[Ian Bicking]

I think the problem you are seeing is Ravioli Code; a (perhaps excessive) reaction to spaghetti code. Also Java (and probably C#) programmers seem to take Patterns too seriously as well, patterns should be descriptive, not prescriptive.

Re:Ravioli Code

[metamatic]

Similarly, object orientation should be used as a tool, not enforced as a religion. If an object-oriented API to some functionality is the cleanest and most useful, implement that way; otherwise, don't. If the best way to build something is using functional programming, do that; don't try and force the code into an object-oriented paradigm.

still very different

[jeif1k]

Don't be fooled by syntactic similarities; C# and Java are still very different languages:

• C# has value classes
  
• C# has operator overloading
  
• C# has multidimensional arrays
  
• C# has unsafe modules; in unsafe modules, you can call C functions directly (no JNI) and manipulate C data structures and pointers
  
• C# does not force you to declare exceptions
  
• C#'s generics are efficient for unboxed types while Java boxes in many cases
  
• C#'s generics are type-safe across compilation boundaries (I believe Java's are not)
  

Basically, Sun did a bunch of things they could do without changing the VM too much and without breaking old code. But for a bunch of other features, they punted and just added a bit of syntactic sugar to the compiler that makes Java look superficially like it's doing the same thing but is much less efficient under the covers.

For enterprise applications, those differences may not matter much (and they may even be harmful), which is probably why Sun doesn't do anything about them. But for desktop use and application programming, they do matter. Microsoft wanted to create a new language that their legions of C++ programmers could use, and C# is a pretty credible answer for that. Those people don't care about cross-platform features, they care about getting the job done, and if that involves the occasional unsafe module, it doesn't matter to them.

Re:Sounds a lot like religion

[AvitarX]

If I am not mistaken MS helped Mono out on their C# implementation.

In the driver arena this the prefered solution to having a closed official impementation. I would assume it is the same for the sake of a language also.

Re:Meanwhile, C++ goes nowhere

[cpghost]

C++ is a great language, but it's choosy about its friends. It takes some time to master all (well most) advanced aspects, but as soon as you do, nothing beats a good C++/STL combo.

What I don't like about C++ standard, is the lack of a decent socket library that would be part of the i/o streams. There are non-portable classes for this of course, and everyone could roll their own, but it's not in the C++ standard (yet).

IMHO, one of Java/C# biggest advantages over C++ is this particular aspect. Not that it would convince me though to switch away from C++ to Java, which simply doesn't cut it yet.

For fast prototyping, I'd stick to Python, but when performance really matters, C++ is still king!

Welcome stranger!

[Oestergaard]

Welcome to planet earth - we also have a language called 'C++', but it is rather different from what you describe.

Here, we have compilers that can do bounds checking - avoiding buffer overflows, if you decide to use them.

However, the template feature of our C++ is so powerful, that when used together with structs and classes, one can produce beautiful code that is extremely powerful, yet so simple that it is easy to ensure it is not susceptible to said buffer overflows (or memory leaks or the thousand other plagues of much of the software that surrounds us).

This is why there is actually not anything fundamentally wrong with our C++. We are some who want template namespaces though, but outside of little issues (that do have workarounds) like that, the only things we really want is additions to the (already powerful) standard library, the STL.

One problem remains with our C++ though. We live on a planet inhabited mainly by clueless morons, people who do not like to learn, people who refuse to accept that maybe others have seen farther than themselves. This is why we, too, have a lot of problems with software in general - buffer overflows as you mention, among many other problems.

I am sure we can arrange for you to get a copy of our C++ standard - that will allow a clever individual, such as yourself, to write software without the problems we discussed. I would then suggest that we join our efforts, in teaching the unwashed masses how to actually use the language properly, so that we will not have to re-do all software in the world (both ours and yours) by ourselves.

Deal?

Re:Only Microsoft

[mcc]

it just does not force you to declare and handle checked exceptions, an issue of strong contention within the Java community

Um, Java supports both checked and unchecked exceptions.

Re:Meanwhile, C++ goes nowhere

[deadlinegrunt]

Wow. I am amazed at your opinion and wish to understand it but I have to admit I reserved to just think that you do not know what you are talking about.

[snip]
"This problem is the primary reason that C# exists. If the C++ committee had fixed their language, we wouldn't need C#."
[snip]

First, this is not why C# exists. For real reason as to why it is search the net. Enough info out there without me reiterating it.

Second, there is "nothing really wrong with C++" and the reason the committee buys that is because it is true. The language specification spells out, as a single example, that if you index beyond the end of an array or dereference a null pointer BOOM! Undefined behavior, as in may work with some sort of reasonable expectation or may unleash flying monkey demons from your spouses nose with the sole purpose of ruining your computer career.

Third, C++ is not an OOPL like Java or C#. It is a multi-paradigm langauge with support for any type of construct you want to throw at it - including shitty code regardless of paradigm.

Again, I am trying to understand where you are coming from but I just do not see your point - or more directly that your point is valid.

C++ as a language is not really lacking at this ponit. Now standardized libs, like the inclusion of the STL was to the standard, are welcome. Things like concurrency, threading, gc, GUI, etc. Yes there are plenty out there but none of them "officially" standard yet. I think this argument would support your point better, if I was understanding what you meant rather than what you typed.

Re:Java checked exceptions suck, but how to fix th

[rewt66]

Yeah, there's a syntax for this. It's called "put the try and catch in the function, with an empty catch block, and a comment that indicates why the exception can't happen." Then your function doesn't have to be declared as throwing an exception, and someone who looks at your code will understand that you didn't just eat the exception for no reason.

And, before you whine about having to write the try/catch block, let me echo what somebody else said, that an IDE like IntelliJ will do it all for you (except for the comment).

pine? mutt

[flok]

Oh, how I pine for the days of vi vs. Emacs.

You must have meant, of course mutt.

It's the installation stupid

[nzgeek]

I've done enterprise-level Java and C# implementations for financial institutions, and reckon there is one thing that people always miss when comparing the two languages: installation.

C#, despite any other flaws, Just Works(tm). Install Visual Studio, write some code, click the run button. Sure it takes a bit of thinking to get a n-tier implementation up and running properly, but the installation of the back-end stuff (IIS, db connections, remoting) is incredibly simple.

On the other hand, to get enterprise Java (J2EE, although some would argue that a class library is easier and more versatile), you need to learn how to install an app server (JBoss, Orion, or god forbid WebSphere), and how to configure that system for database connections, performance, session and object permanence, etc..

None of this really matters in a 'big-iron' enterprise environment, because there's room to hire a websphere monkey to look after the cat-herding. In anything below a mega-corp or mega-bank however, the overhead of running Java can sometimes be a burden that developers just don't want to think about.

I see it kinda like using Firefox over IE. They both do pretty much the same thing, and one does it 'better', but at the same time requires some effort to implement. Some people just can't be bothered with the effort.

You're going to name it what?!

[richever]

Sometime in 1999 after I'd worked at Sun for about a year, a routine all-hands meeting was held for all of the Java Software division. JDK 1.1.8 was the current version of Java on the street and JDK 1.2 was in the works, almost ready for release. We sat there and listened to the usual rah-rah speaches from the divison's head honcho (can't recall who it was at the time), and then he introduced us to a marketing guy to tell us about the launch for JDK 1.2. As he begun talking he displayed a new slide on the project and it read, in all its powerpoint glory, 'Java 2000!' And he went on to say that the new JDK would be called, not Java 2, but Java 2000. Everyone in the audience started laughing hysterically. We all thought it was a big joke. I mean, Microsoft was on the verge of releasing Windows 2000, so you don't really mean.... Turns out this marketing guy didn't have much of a sense of humor. "I'm not joking", he said. The laughs and knee slappings turned into boos and hisses. Head honcho guy says something like the marketing guys have worked hard on this and that's the name they've choosen. The Q&A session was next and, boy, did both of these guys get an earful! Anyway, I can't say for sure, but I think that had it not been for the outrage and disbelief at that all-hands we'd be stuck with even weirder Java naming convenstions today.

Rich

Re:You're going to name it what?!

[p2sam]

I would had prefer Java 2000 over Java 2. The first one is clearly meant to be used for marketing purposes ( I think you Sun guys call it branding ). The later is ambiguous. I can't tell if it's a marketing name or an engineering version name.

Re:Plenty of differences

[Deadbolt]

Behold BigInteger and its evil twin, BigDecimal. They laugh at silly-big numbers.

Re:With Java, stuck in Windows/Linux/Solaris

[shaper]

If it's a choice of language based solely on the portablity of code, C# wins out IMHO. With Java, you're dependant on Sun to support your system, which is a royal pain. (as anyone with a *BSD box will tell you)

I run a J2EE application on WebSphere on a mainframe under OS/390. Where's .Net for OS/390? I can (and have) also deploy that same application with zero changes to Linux, Windows, Solaris, AS/400 or Mac OS X. I can choose from a number of J2EE implementations like WebSphere, WebLogic, JBoss or Resin, each of which have different features and strengths. I don't even recompile, I just drop in the WAR and go.

And it is incorrect to say that you are dependent on Sun to support your system. Independent vendors like IBM, BEA and Apple also license and support J2SE and J2EE for their own platforms. My personal systems are Macs and I get my Java from Apple, not Sun. My corporate systems are IBM and I get my corporate Java from IBM, not Sun. If I have a problem with either, I don't call Sun, I call Apple or IBM. IBM provides my production support contract. IBM are the ones who responded with a custom patched version of WebSphere for OS/390 in less than 24 hours when I had a production problem. Not Sun.

Re:Where can I get C#?

[ChatHuant]

Free C# compilator? Right here: .NET Framework SDK

Or here: Mono project

Free IDE? Here: Sharp Develop

Or, if you want to test .NET 2.0, go here:
.NET Framework 2.0 SDK

As you see, you don't have to pay anything to try C#; since you say you're convinced, go for it!

varargs is *not* an enhancement

[hopethishelps]

5. Varargs (C# 1.0's params construct, ellipsis construct in C++)

As Stroustrup says of the ellipsis construct in C++, "The most common use of the ellipsis is to specify an interface to C library functions that were defined before C++ provided alternatives", and gives an example of the "extra work that face[s] the programmer once type checking has been suppressed using the ellipsis." Using the ellipsis construct, other than where it has to be used to access some legacy C library, is definitely very poor style in C++.

Re:Flaws in both Languages

[scovetta]

As soon as people mention "enterprise-grade web applications" it's time to skip to the next thread. These people live in a little world that's been built for them by small minded project managers, clueless clients, and a university programming course that's been bought and paid for by a large corporation (usually Sun Microsystems).

I take exception to that. Just because you can't do it doesn't mean that it can't be done. Maybe where you're from, Sun runs things, but here, it's the business-- how can you get the job done better and faster? And Java has proven to be a useful tool, when used by competant programmers (not Learn Java in 21 Days type).

I'll try to make my case for "enterprise-grade web applications". Such an application needs the following features:

1. Does what the customers want
2. Secure
3. Database-driven
4. Clustered/clusterable
5. ***Maintainable***
6. Performs well
7. Integrates with other systems
8. Deliverable by the deadline

It's #5 and #8 that are hard to come by. As for maintainability, I see Perl as a Write-Once language, with PHP only slightly better. Java/C# are much easier to maintain because (a) their syntax is not prone to being overly compact (read: unreadble), and (b) the number of people who can maintain Java applications is probably much larger than those who can modify your Perl app.

You advocate Java and slam PHP in the same post? Both of these languages belong in the same beginners class.

Where do you work that Java is considered "beginner"? Have your company actually produced applications?

Operator overloading

[evilpenguin]

Say Amen!

Just because operator overloading can be used for evil is no reason to throw the baby out with the bathwater.

Java lacks a Currency class, so I wrote a Money class some time ago that I use for common financial calculations, and it takes care of the pesky problem (and newbie mistake) of using floating point types for money.

BUT, in Java, you have to have add(), sub(), mult(), and div() methods. Reading RPN style caclulations consisting of sequenced and nested method calls instead of algebraic operators is painful. Operator overloading is wonderful in those cases.

Operator overloading certainly can be evil: What does it mean to increment an Employee? Do I really want to know? But for new types that you can actually do algebra with, it is quite helpful.

And there are other cases.

In my C++ days I wrote a FileHash class that kept an index of offsets to the start of each text line in a text file. Then I overloaded the array subscript operator so that a text file could used like an array of char pointers (or a String class if you liked). That was a perfectly good use of overloading.

Moreover I think overloading the array subscript on ordered collections also makes perfect sense.

I often wish Java had this feature. I agree with every simplifying choice they made except this one.

Any place for both of them ?

[dweeves]

It's too easy to give C# an advantage about what it adds to Java and forgetting it's a 95% Java clone.

Don't forget It took 7 years of Java and a Borland expert to produce C# !

During this time, Java did conquer most of the enterprise application development market and defined a technology model based on application servers handling component lifecycles.

C# as a language,has taken most of java state of the art paradigms and added some new features which are neat but, despite its huge base library is far from Java versatility and degree of maturity.

Java 1.5 advantages

• Language Features/Libraries:

• Server side Programming:
• Defined server side technology paradigms, with lots of implementors to handle them (open source and free ones are competing with the best commercial ones).

• Client Side Programming:
• Applets (which aren't dead technology if you know how to use them)
• Web Start

• IDE/Tools
• Eclipse (which is free and open)

• Management aspects
• Lots of available skilled developers
• Can run on any platform with a compliant JVM (if well coded)
• All big database vendors have JDBC drivers
• Mature technology

Java 1.5 Drawbacks

• Server Side:
• Web Service support are expensive to implement and non-standardized.
• Very poor JSF controls

• Client Side:
• Swing (but SWT / Eclipse rocks)

C# advantages

• Language Features:
• Benefits from the .Net Jitter.
• Events/Delegates model

• Client Side:
• Future Windows Development preferred language (along with XAML which is more about powerful UI macro-scripting)
• DirectX integration
• Speed (on Windows)

• Server Side
• ASP.Net Controls model

• IDE/Tools
• VS .Net (most productivity boosting IDE IMHO)

• Management aspects
• Still time to have plenty of Microsoft support if you have a interesting project.

C# drawbacks

• Language Features
• No Observable/Observer (but achievable through Events/Delegates)
• Serialization limitations

• Client Side
• No Windows independent GUI framework. (WebForms are server-based controls)
• No applets equivalent (don't event think about ActiveX)

• Server Side
• No detailed Infrastructural model, No best practices, No fine grained control.

• IDE/Tools
• No free IDEs compares to VS .Net and is really useable when you're used to commercial IDEs features. (Borland C# Builder CE is too restricted and not open source)

• Management aspects
• Young technology
• Not that much real experts available out of Microsoft
• Windows deployment only (Mono's out, but still work in progress ,can't be a professional choosen .NET deployment platform yet IMHO)

So, my conclusion is that by now, both technologies are interesting but Java is the most versatile.

I would prefer C# for:Windows Programming ,Attractive Web based interfaces (if an acceptable target platform is Mono or Windows), Porting existing windows applications to Web, Simple Self-Contained Web Services

I Would prefer Java for developing:Enterprise Applications,Complex Web Services,Highly interactive web interfaces (through applets),Multi OS client application.

For me, both languages are relevant, it's only a matter of what work has to be done and what resources are available to make it.Most of the time, technology is chosen based on a company resources capabilities!