What is 100% pure java?

A philosophy?
A style?
I dont know...

It means using only Java - no native code compiled in, for example.

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Is Eclipse a 100% pure Java program?

Is Eclipse a 100% pure Java program?

Eclipse runs on linux, windows, MAc OS X and I think a few others. It has native widgets via SWT for those platforms using the native OS Look and Feel. It is smoother than Swing in most ways, yet Swing does have some advantages as well. SWT is a nice kit. It would be nice if the Swing Team took the idea of building a cross platform native GUI kit into the AWT/Swing layer so that Swing was even faster. I think Swing and SWT are great, only I wish Swing had provided what SWT does (in some ways) so that Swing would have been used and SWT never written. It's a shame, but then again, perhaps it promotes the Swing Team to make Swing better/faster.
Look at Swing on Mac OS X, it is very nice, looks like native OS (because Apple wrote their own L&F for Mac OS X Only), but it is faster than Swing on Windows/Linux.

100% pure Java

Does Sun have to formally authenticate one's code as 100% pure Java or is this purely an informal tag that the developer uses to show people it will run on any platform.
Ta

Its not possible to write a 100% pure usfull java project (meaning a project with
some form of input or output), but the code is not system dependent. what? Java was written to provides cross platform compatitable. ou can write useful application that is 100% pure Java and is not System dependant.
look at the Java API...it's prett abstract from the operating system. Of course, thee are libraries (3rd party) that aimed at a specific OS (such as Jakarta POI library)

100% Pure Java Program

I have seen that the 100% Pure Java Program has "completed the Sun End of Life process and it is no longer supported by Sun" (see http://java.sun.com/100percent/).
Can anyone explain to me why is this, and what alternatives do we have now to be Java Certified (if any)?
Thanks.

It's disturbing but probably not end of the world.
I like this:
"Any use of product on this page is at the sole discretion of the developer and Sun assumes no responsiblity for any resulting problems."
Do they mean that jdk 1.4 is bugless and they are resposible for any problems if something happens?
I do not think so.

Where is the "100% Pure Java Check" ?

Dear friends,
few years ago we had a very popular application called 100% Pure Java Checker.. a tool used to verify the portabiliy of Swing Programs...
is there something similar nowadays ?
where ?

JavaPureCheck has completed the Sun EOL process and is no longer supported.

100 % Pure Java Certification !!!

I have a product developed in Java 2. The product is developed entirely in Java and is platform independent. I want to go in for the 100 % Pure Java Certification from Sun Microsystems. Can someone let me know how to go about getting this certification.
Thanks a lot in advance.
chet888

Hi, here is something that I have found very useful..
http://cramsession.brainbuzz.com/cramsession/sun/java2
Let me know if you need any more information..Hi Geetanjali,
Well your site does not mention anything about product certification, it only talks about Sun Certification of Progammers. If you have any idea about product certification, please let me know asap.

Can clock synchronization be implemented by pure java?

I want to build a simple distributed application, whose main purpose is to synchronize the local system clock in the slave JVM with the clock in the master JVM. Can it be implemented by pure java? Or I have to use JNI to implement it?
And although the application is mainly used in LAN, the delay of transferring the data of time is small, but is there any algorithm to minimize the difference of system clock between the master and the slave?

No. You can not synchronize the System Clock (clock) in 100% Pure Java.
Using The Network Time Protocol (NTP) and Java, you can access the current time from many servers around the world.
The problem here is that you can't change the clock through Java without an interface to the actaul clock.
Since the clock is a native component (application, service, or utility) you can't change it while being 100% Pure Java.
That does not mean that you can't do it at all. It just will not be Pure Java. You can, however, test to see what system you are on and then adjust the method used.
On a Windows system, the clock is set by the Control Panel applet "Date and Time." This applet can be updated using the Command Driven Interface (CDI), also known as a Command Prompt. To do this you can use the Java object Process. The parameter, a String value, should point to the location of command prompt. Then add a PrintStream object to the Process object. Send the following line (using PrintStream.println()) - "time" and "date"
To update the time use the following line:
time [ time ]
Use the time format: hh:mm:sec
To update the date use the following line:
date [ date ]
Use the date format: mm-dd-yy
This will work on Windows machines (3.x, 95, 98, Me, NT, XP) MS-DOS (all versions with Date/Time capability).

Java is 100% pure object oriented language or not?

PLS help me...?
I am get confussed.
Java is 100% pure object oriented language or not?

the only full OO programming language on thisplanet
is SmallTalk.On your planet maybe. On mine, at least Eiffel
also exists, probably more unknown others too. Some
count Ruby, but I never looked at it.Ruby is pure OO too, FYI.
the only full OO programming language on thisplanet
is SmallTalk.Care to explain it in some more detail? What
exactly is 100% OO, b.t.w.?No, I don't careWow, what an incredibly unhelpful response.
In essence, 100% OO implies that every type within the language is an object. Since Java has primitive types like int, boolean, float etc, it cannot count as 100% OO.

Is java 100% pure object oriented?

I am very confuse is java 100% pure object oriented language.
bcoz
1)object oriented means everything should be in object but
primitive data type is not object.
2) java don't support multiple inheritances which is one of the oop 's
concept

I'd say that java is 100% java. No more, noless.
I'm gonna say it's about 99.4738383% java. For
no
reason other than to confuse idiotsSomeone's always bumping their heads against
some
arbitrary theoretical purity when they aremissing
what was, is and always has been most important:
functionality.Functionality matters virtually nothing to thepeople
that post these "questions". All that matters is
being able to say the right thing in interviews so
they can get a job and get carried through their
career by people who actually know what they're
doing. See it all the timeHehe, who carries you whilst you post here all day
:P
Ant builds, mostly :p

Java is 100% pure OOPS Language or not

Hi Everyone!
I want to know that Java is 100% pure OOPS Language or not??
If yes or no, then why?
Plz reply

Use the search window on the right side of this page. This absolutely meaningless question has been asked, and answered (argued about really) hundreds of times on this forum already.
@mods, please lock this thread.

Generate a thumbnail from HTML by pure Java on Linux without Graphics

hi - we in a requirement where we have to generate thumbnails from HTML code. The solution must be implemented in pure Java on Linux where there is no graphics support.
Options tried already are :--
1. 3rd party websites - rolled out by our client.
2. Paid products - rolled out by our client
3. Media Tracker and other java API - no luck as there is no support after HTML 4.0
4. Using any os dependent native library - rolled out by our client.
5. Lobo browser - but having troubles like it opens the browser before screenshot is taken, sometimes. Gone through by putting Thread.sleep() in between and saving remote images into a local html file etc. We got some success in there but problem doesn't end here.
Questions -
1. In the point # 5 above, our Linux server had graphics support but in code we set the system property java.awt.headless= true before capturing and generating thumbnail. My question is, if we set this property in the code then does it mean 100% that our code will not use any graphics support, if present in the underlying OS?
2. Is this really possible to generate images in java on Linux where there is no X window/X server installed? Are we just wasting time in order to achieve which is unachievable?
Any suggestions are most welcome.
Regards,
Sanjeev

Thanks for ur response! Yeah - we tried but requirements are little different. We have HTML that we have to first render. Whatever output comes, we have to take a screenshot. So in order to render the html we have to have a browser first and I believe every OS which is providing browser support is having Graphics capabilities because browser would have frames, windows, toolbars, menubars etc which fall under Graphics.
The above way is the only way that I know. If there are another way which ofcourse doesn't require graphics support, please let me know.
So the question basically is - if I follow above mentioned image (like opening browser and capture screenshot) then is it possible on Linux with no graphics support? Actually I read on internet that lobo browser (written in java) supports this kind of feature.

Log4j doesn't create backup files in web-app, the same code in pure java ap

Hi all,
in my application I have a class DummyLogger, which is a superclass to all others. It provides them a log4j Logger.
In the constructor it sets up the important attributes:
log = Logger.getLogger(name+" (" + app + ") ");
log.setLevel(Level.toLevel(level));
PatternLayout defaultLayout = new PatternLayout("%p %c,line %L,%d{dd.MM.yyyy/HH:mm:ss},%m%n");
RollingFileAppender rollingFileAppender = new RollingFileAppender();
rollingFileAppender.setName(name);
rollingFileAppender.setFile(path+app+".log", true, false, 0);
rollingFileAppender.setMaxFileSize("10MB");
rollingFileAppender.setMaxBackupIndex(5);
rollingFileAppender.setLayout(defaultLayout);
log.removeAllAppenders();
log.addAppender(rollingFileAppender);
log.setAdditivity(false);Formerly I had the application as a pure java app and everything worked fine. Now I've made it a web application (I run it on WebsphereAS 5.0) and it has stopped creating the backup files. However the code remained the same.
Any ideas what has happend?
Thanks a lot,
Ondra

I also have the same problem. Did you find a fix?

OCI Vs 100% Pure JDBC Drivers..

Hi there,
Can anyone explain, why would I consider using OCI native code drivers in Java applications instead of the 100% Pure JDBC driver ? IS OCI driver faster/ has more features ??
thankx
Gautam

Hi ,
The only dis-adv with OCI driver is that it is not compatible in other platforms , since it uses native code and requires a client installation of oracle.
But the advantages over power them ,
Its very much faster and has a lot of added features .,
You can refer to the oracle documentaion.
http://download-west.oracle.com/otndoc/oracle9i/901_doc/java.901/a90211/overvw.htm#1004533
Regards
Elango.
null

Pure java 3d engine suitable for applets?

hi,
i've searched the forums for this, but previous threads have broken/out-dated links etc..
i'm after a lightweight simple 3d renderer that is small and fast enough to be used in applets
is there a standard 3d project ppl use nowadays? the best i've found so far is jazz3d (http://www.jazz3d.co.uk/) but am thinking there must be a sourceforge project that is more attractive?
any help appreciated,
asjf

I'm not sure if what I am about to mention is something you'd be interested in or not, but it does fit the criteria of being pure Java and the images it renders are in 3D. The Standard Edition of Java bundles a series of examples in the "demo" folder. One of those examples, found in the "MoleculeViewer" folder, performs a 3D rendering in an applet of a molecule. This could at least show you how to go about doing your own 3D rendering without using Java3D.
To find the example I am talking about, look under the following directory:
<java home>\demo\applets\MoleculeViewer
-Dok

Pure Java Decompiler

Is there a good, free decompiler that is written in Java? If not, is there a reason? I'd like to be able to decompile/compile code directly from my running java code, and using Jad and javac is pretty clumsy for that.
I know there are some clumsy and unsupported workarounds for compiling code from java, but it really seems strange that there isn't a standard API for that...

Sorry i don't know the answer for your problem. Though let me mention that javac isn't pure Java anyway - it doesn't adhere to the JLS (the Java Language Specification) completely, whereas - for example - jikes is 100% JLS compliant.

What is 100% pure java?

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