Why java is free?

I don't understand why java technology is free to download, and even more of this, the source code is available.
I think sun can make a lot of money from us. (without giving ideas)

They're trying mic$ofts trick - for years micro$oft offered wondoze on easy to copy disks, with little or no security (even though they could have implemented some kind) knowing that people would pirate it, and spread it around very quickly. Then, when most of the computing world is hooked on using windoze, they upgrade to a flashy secure version that you have to pay loads for. It was a gamble, but certainly paid off. What sun are doing is the only possible tactic for them at the moment, which is to spread java as much as possible to ensure loads of people use it - they are not doing this for fun, or the love of the language, but purley and simply as a business strategy.

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Are Java Interfaces 'free'?

From a performance point of view, are Java interfaces free?
That is, if I have:
class Foo
public void bar() { ... // some code }
}and I change it to:
interface Foo
public void bar();
class FooImpl implements Foo
public void bar() { ... // some code }
}And I call one or other of the Foos like
Foo foo // A parameter, field or local variable.
foo.bar();Does calling foo through an interface add any overhead that calling it direct in the first example not? As I understand it, all methods are 'virtual' in Java, so it should perform the same in either case.
Thanks for any of your thoughts.
Rupert

rupertlssmith wrote:
YoungWinston wrote:
The Second Rule of Program Optimization (for experts only!): Don't do it yet.
- Michael A. Jackson
Basically, don't worry about it. Worry about writing clear, correct, object-oriented code.
Wierdly enough, in the long run, that is more likely to help than anything else you can do, should (and if) you ever need to worry about optimization in the future.
WinstonThanks for the advice. I can write good clear OO code. I am now at the future and worrying about optimization, so have made it past the second rule!Then you exactly know where your bottleneck is from the profiler you've used. Did it tell you that your interfaces are the bottleneck? If so, why do you even bother to ask here?

Why does my free trial not work?

Why does my free trial not work? This is intentially misleading.

You need to provide a better description of what isn't working, system info and all that. This could be all sorts of technical issues or your trial could simply have bombed itself. In the latter case there is nothing you can do:
Adobe trial software expired early
Anything else like iunstall issues can in most cases be sorted out...
Mylenium

Why java file name and class name are equal

could u explain why java file name and class name are equal in java

The relevant section of the JLS (?7.6):
When packages are stored in a file system (?7.2.1), the host system may choose to enforce the restriction that it is a compile-time error if a type is not found in a file under a name composed of the type name plus an extension (such as .java or .jav) if either of the following is true:
* The type is referred to by code in other compilation units of the package in which the type is declared.
* The type is declared public (and therefore is potentially accessible from code in other packages).
This restriction implies that there must be at most one such type per compilation unit. This restriction makes it easy for a compiler for the Java programming language or an implementation of the Java virtual machine to find a named class within a package; for example, the source code for a public type wet.sprocket.Toad would be found in a file Toad.java in the directory wet/sprocket, and the corresponding object code would be found in the file Toad.class in the same directory.
When packages are stored in a database (?7.2.2), the host system must not impose such restrictions. In practice, many programmers choose to put each class or interface type in its own compilation unit, whether or not it is public or is referred to by code in other compilation units.

HT1349 Why is my free audio download, that I purchased earlier this year, not showing in my library or my i clouds?

Why is my free audio download, that I purchased earlier this year/late last year, not showing in my itunes library and/or my icloud?

I don't want to change all my computer's visuals just because firefox has a bug in it! The Menu bar is rendered faintly and this is a bad idea. At least give me the choice . . . see image below. I have vista running ffox 4 and none of the fancy settings can fix this. Also I want transparency on! Most programs work properly. They don't force me to adhere to some idiot programers whims, likes or dislikes.
Of course ranting this way will get me nowhere . . . such is life.

Why Java Web Start doesn't support Pack200 out-of-the-box?

Hello All,
Why Java Web Start doesn't support Pack200 out-of-the-box? I was hoping that Java 6 would make things easier by adding direct support for Pack200 in Java Web Start and JNLP without needing to use servlets, etc.? All my clients are Java 5 or above so I can't push the Pack200 compressed version of the jar to every single one of them and there is no selection process needed. But I can't do it because of the servlet or complex Apache server setup requirement (it would be a headache to get customers' web server admins to set up Apache or whatever web server that way).
My question is why is there unwillingness to add Pack200 support directly to Java Web Start and JNLP so that you can start Pack200 compressed jars just like you would start any jar using Java Web Start? Is te a technical problem?
Thank you,
Mete Kural

Hallo,
I didn�t try it, but the webstart FAQ�s read:
Can I use Pack200 compression with the JnlpDownloadServlet?
Yes. The JnlpDownloadServlet distributed in the samples directory of the JDK now supports Pack200. If you deploy yourfile.jar along with yourfile.jar.pack.gz the packed file will be downloaded when the client is running Java Web Start 1.5.0 or later.
http://java.sun.com/javase/6/docs/technotes/guides/javaws/developersguide/faq.html#217
For further information you may want to look at
http://java.sun.com/javase/6/docs/technotes/guides/javaws/developersguide/downloadservletguide.html#pack200
The configuration of the server and the the servlet (as described in the second link) is as easy as it seems.
I got it working on the first try and it was my first experience with websevers at all.
Bye Schippe
Message was edited by:
Schippe

Why java is called java2

why java is called java2 and another thing that i would like to know is why it was renamed to java from its previous name OAK
Thanx
Manish

why java is called java2Not to sure about this one, but I think it was a marketing decision - I guess 'Welcome to the Java 2 platform' sounds better than saying 'Welcome to the JDK 1.2.1 platform' :=)
and another thing that i
would like to know is why it was renamed to java from
its previous name OAKThere was already a patented product named 'OAK', so they had to rename it to something else to avoid the law.
>
Thanx
ManishA brief history of Java:
http://java.sun.com/features/1998/05/birthday.html
http://www.ils.unc.edu/blaze/java/javahist.html

Why wont these free plug-ins/filter show up in Final Cut Pro X?

Why wont these free plug-ins/filter show up in Final Cut Pro X? Two of them are .fcfcc files from http://pistolerapost.com/pluginz/index.html

Here are many good effects http://www.fcp.co/forum/9-free-fcpx-plugins-and-templates

The iwork was supposed to be free for OS X (Mavericks). Why it aint free yet.?

The iwork was supposed to be free for OS X (Mavericks). Why it aint free yet.? plz help

iWork and iLife for Mac come free with every new Mac purchase. Existing users running Mavericks can update their apps for free from the Mac App Store℠. iWork and iLife for iOS are available for free from the App Store℠ for any new device running iOS 7, and are also available as free updates for existing users. GarageBand for Mac and iOS are free for all OS X Mavericks and iOS 7 users. Additional GarageBand instruments and sounds are available for a one-time in-app purchase of $4.99 for each platform.

Why java is platform independent ?

what is the meaning of java is platform independent ? is it just because of java code can be run in windows/linux/unix platform ? but then C/C++ also can be run in windows/linux/unix . so why those are not called platform independent ?
why java is called platform independent ?

c/c++ creates object code . similary java creates bytecode . java uses interpreter JVM to execute . similary c/c++ object code also executes in any platform. so where is the real difference ?
the classes do not need to be recompiled for different platforms. what do u mean by this ? ".....classes ( i.e bytecode) dont need recompilation ..." .....ok....but same thing is true for C/C++ object code also !! they also dont need recompilation.
where is the difference ?

Blog post: Embedded Software: Disruptions Ahead - Why Java makes sense

All,
You may be interested in this blog post I did two days ago, which talks about the challenges in embedded software design and why Java makes sense for embedded software engineering:
https://terrencebarr.wordpress.com/2013/08/05/embedded-software-disruptions-ahead/
Best,
Terrence

(bump)

Why java only can display GIF file not jpeg and BMP ??

Did anyone know why java only can display GIF file not in jpeg and BMP ?? This is because the quality of GIS is not as good as Jpeg and BMP
any code to load the display process ??
thx guys !!!

you can do jpegs but im not sure about bmps.
The only thing ive noticed is that java cant support transparent jpegs, only transparent gifs
Jim

Why java allow start() method only once for a thread

Hi ,
Why java allows start method only once for thread . suppose
Thread t = new Thread();
t.start();
say at later stage if again we call t.start() IllegalStateException is thrown , even though isAlive method returns false.
Hence the question , why start() method is allowed only once.If you need start a thread , we need to create a new instance.

Really. Why do you think that? Do you have any evidence? It is one of the first things I would think of, personally.Considering that the Thread API doesn't allow you to specify a stack address (only stack size), I think it demonstrates they wanted to remove that capability from their Thread API all together. That missing "capability" makes me believe they want me to believe it's not something I need to worry about when using their API... I think the exact semantics of the Thread class and its methods were driven by how to make it most understandable and usable for their customers. I'm certain this issue was one of many that was given considerable thought during the design and implementation of the JVM and the underlying runtime classes.
Do I have any evidence? No. But if you can point me at some first-hand information on this, I'd love to read it. Most of what I've found is second or third hand accounts. (and I mean that sincerely, not as a smart-ass remark or rebuke of your comments).
On the one hand you seem to think the Java API designers are idiots, on the other hand you think that they should be. I can't make it out.I thought my position was that the Java developers were talented enough to implement platform in whatever way their API called for; hence, the designers made a choice about how they wanted their API to be used by their customers. They decided which capabilities they wanted to include or exclude, and created an API that was consistent with their vision for this technology. While I'm certain technical limitations had an effect on the API design, I certainly don't think the API was dictated by the them.
I think the current design of the Java Thread API was a reflection of their vision to make Threading easier and more accessible to Joe Programmer, not limitations in the implementation. I never said it was wrong or that I could do better... I just said I think they could have done something different if they decided it would have made for a better customer experience. But hey, maybe I'm wrong.

Why Java is following Unicode & not ASCII standard?

Hi all,
I am new to Java as well as to this forum.
Could you please tell me why Java is not following ASCII format?
And why is it following Unicode?
Thanks,
Reni

Unicode is chosen because it's an abbreviation for Unique Ode, which means that it provides a special sort of poetry to give Java an aura of mystique, intelligence and worldliness that sets it apart from other languages.
To support languages and characters other than English.Who doesn't read/speak English, really?! And why isn't there multiple language keywords for Java. Why can't I write code en Espa?ol?
p?blico vac?o hagaAlgo(Secuencia s) {
para(nent i = 0; i < s.longitud(); i++) {
Sistema.fuera.impresi?nL?nea(i + " = " + s.car?cterEn(i));
}(int abreviated for "n?mero entero")
Message was edited by:
bsampieri

Why java is strongly typed language

Can any one help me to answer the following query:
(1)why java is strongly typed language?

Can any one help me to answer the following query:
(1)why java is strongly typed language?http://en.wikipedia.org/wiki/Strongly-typed_programming_language

Why java is free?

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