Why Java for OS X (SE 6 to 1.6.0_43)?

I already have Version 7 Update 17 (1.7.0_17-b02), the version that Oracle's site recommends - yet Software Update keeps warning me that I need to install SE version 1.6.0_43.
Can Software update not tell that there is a newer version installed? Whats the deal?
And yes, it still shows up after updating to OSX 10.8.3

Thanks for helping to at least not have to see it.
But the question remains - why does it want me to update when I have a NEWER version installed?

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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 do i keep repeating install of java for OS X 2013-005?

why do i keep repeating install of java for OS X 2013-005. When i restart my mbp it asks me to reinstall. My unit is 15-inch, Mid 2012

If you have more than one user account, these instructions must be carried out as an administrator.
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
Select
/var/log ▹ install.log
from the hierarchical list on the left. If you don't see that list, select
View ▹ Show Log List
from the menu bar. Then select the messages from the last installation or update attempt, starting from the time when you initiated it. If you're not sure when that was, start over and note the time. Copy them to the Clipboard by pressing the key combination command-C. Paste into a reply to this message (command-V).
If there are runs of repeated messages, post only one example of each. Don’t post many repetitions of the same message.
When posting a log extract, be selective. Don't post more than is requested.
Please do not indiscriminately dump thousands of lines from the log into this discussion.
Important: Some private information, such as your name, may appear in the log. Edit it out by search-and-replace in a text editor before posting.

Why SAP has taken Java for their development instead of ABAP completely

Hi
I am Neelima, new to SAP and abap,
Can u please explain
Why SAP has taken Java for their development instead of ABAP completely
Thanks in advance
Regards,
Neelima

Hi Neelima ,
Answer to Q . Why SAP has taken Java for their development instead of ABAP completely ?
First of all in my view SAP has not taken Java as Such instead of ABAP .
But you nowdays whole lot of java is coming in SAP by doors of SAP NetWeaver .
Now why they choosed java only <b> IN MY VIEW</b>
1)     Java is open source so SAP in tie up with SUN can develop SAP specific APIs and thats what happenings . In Net Weaver Developer studio (NDS of SAP like eclipe of Java ) we use packages ,classes , methods for SAP.
2)     In my view Java is rocking in Web world , Every single popular product ( like IBM MQ series , Oracle Apps ) is making use Java for making things web based .
So why not SAP .
3)     Now data ultimately data is getting saved in XML . And java is best to deal with that . In SAP also Idoc data is stored in XML and so same data can be used anywhere inspite of Platform , technology .
4)     Java has much established base of web Solution , Web services .They have got beautiful architecture so that Best Web sevices can be developed with EJB (Enter prise java beans ) , sturts and all .
5)     Now Its time for SAP to be Mobile Enabled .i.e. to Run SAP over PDA , Blackberry .Such solutions possible with SAP + Java combination .Java provides that framework to understand Mobile OS platform.
6)     Another thing now Its time of EAI (Enterprise Application Integration) . Integration is future . Multiple product integrated and used togetherly , exchanges data. Take case SAPs message goes to Sieble , people soft .For this Java + XML is best suied as both product understand it .
Utimately SAP is Using java to provide Best Web ERP solutions
But it does not mean ABAP is not there. With webDynpro ABAP you can do every thing that WD java does . In fact incase if you have existing ABAP recourses then use WD ABAP for developing web services in SAP. In uses OO ABAP as base programming language .
Please refer to this link
IS Webdynpro for ABAP/JAVA is same?
so hope your question is cleared
Cheers
<b>Parry</b>

Why can't I print pdfs since installing Java for Mac OS X 10.6 update 12?

Two days ago I installed the software update 12 for Java for Mac OS X 10.6 now pdfs I try to print come out blank or with data, only the company's logo

I read the article. This problem of mine occurs when I try to print from an email attachment not from a website.
I am in Mail not Safari. I click the little triangle to show the attachment then double click the icon of the attachment, the pdf opens in adobe reader but when I try to print it the page that comes out of my printer is blank or shows only the masthead of the company but no content.
I tried a two month old email attachment and got the same results.
I looked for the plug-ins mentioned in the article but coul not find them on my Mac in the applications file.
Does anyone know how to uninstall the "Java for Mac OS X 10.6 update 12" ??

HT5367 Why does Java for OS X 2012-006 lead to this article!!!

On Apple.com -> Support -> Downloads, searching for Java for OS X 2012-006, opening the article to download leads to Java for OS X 2012-005.
So I can't download the Java, and it's telling me I have missing content.
Could use please fix this?
Regards

No I did have Java 7 installed.
Then I uninstalled it, using the guide from here: http://www.java.com/en/download/help/mac_uninstall_java.xml
It worked fine with 1.6.0_35 untill Apple released 1.6.0_37, then it just stopped working. In Safari, FF and Chrome.
Tried installing Java 7 again now that 1.7.0_9 had come out to see if that solved my problems, but no that was equally screwed. So uninstalled it again.
Where Java should run it just says "missing addon" or rather since it's danish "manglende tilbehør".
I daily support people with their computer, and I'm close to saying I have to reinstall my mac to get java working again, and that's just dumb.
If they would just link to a proper download article so you could download java 1.6.0_37 for mac os 10.8 then the world would be a but more peachy.

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.

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

HT1222 Weird security update Java for OS X 2013-003

Why is the security update Java for OS X 2013-003 causing my 15" rMBP to start displaying a flashing window asking me if I want to allow the application "java" to accept incoming network connections?
OS X 10.8.3

It appears that these errors are arising because:
Oracle Java has been installed on your system,
there is some add-on code that is running, and that is using Oracle Java components,
the add-on code is attempting to initiate network connections,
and the Oracle Java connections are failing.
Basically, there is Oracle Java code running here somewhere — code which is not part of OS X, as OS X 10.7 and later do not include Oracle Java by default — and this (unknown) code is using Oracle Java and the Java Virtual Machine (JVM), and the code is encountering some new "defensive' measures. Or is encountering an Oracle Java bug, which would be an Oracle issue with their Oracle Java product.
Y'all have to figure out what code is running here (and that is dependent on Oracle Java and the JVM), and if the code is expected and necessary here, to then work with the vendor to resolve the behavior here and/or upgrade to the provider's current version of the software.
Based on the DDService64d reference, there appears to be Drobo software here, and some Drobo software apparently requires Java and the JVM. Here is some information from Drobo. (There's a recommendation there to disable Gatekeeper, and — while that likely does resolve the issues referenced — I'd prefer to avoid disabling Gatekeeper in general.)
Again, figure out what's installed and using Java here. Remove it, upgrade it, or check with the vendor.
Oracle Java does have a recent history of various serious security issues, and it's common practice to disable the Oracle Java web-start plug-in, or to entirely avoid installing Oracle Java on OS X on 10.7 and later. If you're not using and don't need Oracle Java, then don't install it. If you've previously installed Oracle Java and don't need it (as is the case on OS X 10.7 and later), reportedly Oracle has a tool which can remove Oracle Java.
note: Oracle Java is completely different from JavaScript.

Open source / Commercial version, it's up to you! Why not for ESB products

Please comment this forum and help us to get Sun's support for Open ESB as we can get it for open-Solaris or Glassfish.
Thanks
Paul
Extract from
http://www.pymma.com/eng/People/Blog-Paul-Perez-Chief-Architect
Jonathan Schwartz new policy
Few years ago, Jonathan Schwartz replaced Scott McNealy as SUN Microsystems CEO. Swartz's first decision was to convert Sun into an Open-Source company. Consequently, Solaris OS, Application Servers and even the Java language were opened and their sources published. At present, Sun is viewed as a major Open Source actor.
Sun�s new sales philosophy proposes, on one hand, its best products in an open-source format and on the other hand, commercial support and hardware. The best examples of this new philosophy are Open-Solaris and Glassfish. You can download these products, use them and test them. After you have built applications with these tools and wish to move into a production environment, you can buy support from Sun.
Open source or Commercial version, it's up to you!
Alternatively, you can as well buy commercial versions at the first place. Even if open sources and commercial versions are slightly different than the open-source ones, more than 95% of their code is originated from the same development branch. Example : SUN proposes its queue messaging system with two similar versions, respectively named �SUN QM� and "Open-MQ". The only difference is the amount you pay for the technical support.
Everyone can find advantages in this sales policy on Sun products: companies and developers try and develop for free and can rely on Sun support in production. As a matter of fact, Sun uses these �free� products as Trojan horses to conquer new market shares, penetrate new companies and sell Sun hardware.
Why not for ESB Products ?
Unfortunately, there is a small issue in this picture: Sun's ESB platform is the exception in this sales policy. In Fact, Sun proposes two different tools for ESB developments. The first product. "JCAPS", is a commercial product inherited from Seebeyond. The second product, "Open-ESB" is based on JBI specifications (JSR 208) and was developed from scratch about 2 years ago.
Alas, JCAPs and Open-ESB are definitely two different products.
JCAPS ignores JBI specifications
JCAPS connectors are based on JCA specifications and not on JBI.
Open-ESB development process is based on Web services specifications, JCAPS not.
JCAPS and Open-ESB developments are not compatible.
Hundreds other differences can be found between the two products.
We can understand that for a while, for technical, marketing or business reasons, a company supports more than one product lines with the same functionalities. IBM does it and Oracle buying BEA will do it also.
However, there are several things that Pymma would like to understand:
Why the download of JCAPS is only available for authorized JCAPS Partner ?
Why SUN does not provide support for open-ESB as it does for Glassfish, Open Solaris or Open MQ ?
Why JBI or Open-ESB are never mentioned at most ESB seminars organized by Sun Centres in the UK ?
Why Sun marketing, Gurus or consultants are prolix about JBI in the public lectures and technical forums, and at the same ignore Open-ESB when they advice companies ?
Is the policy of Jonathan Swartz policy only applicable for Java Legacy applications (Application Server, Message queuing�)? not for ESB tools ?
Of course, we already asked these questions to SUN but we never got clear answers.
Thanks for clarifying Sun's position
Many companies believe in JBI and their developers spend time and energy working on Open-ESB . These companies would certainly be interested to hear Sun's explanations on the above questions. They probably want to be sure that Open-ESB will not be just a prototype for the new JCAP version (only reserved for SUN JCAPS Partners). They certainly want to be credible by proposing SUN's professional support on Open-ESB as they do for Glassfish and Open-Solaris. After, they only need from SUN to clarify its position and give a clear prospective for the future of JBI and Open-ESB. We hope that through this blog Sun will hear us and we will give us clear answers.

Hi Leonie,
My iPhoto is iPhoto 11, version 9.4.2. I believe my Aperture is the latest version but I don't know how to verify that when I can't open it. I regularly accept any updates.
How I restored my Aperture Library: I opened Aperture, clicked on Time Machine, and navigated to the Aperture Library that had been backed-up earlier in the day. It took a while to restore.
When done, I opened Aperture (yes, at that point I could still open it). It opened up on the still-empty Library, and I had to manually change it to the restored library, every time I opened aperture after that. This was annoying, so, I then went to FINDER and deleted the empty Library. I probably shouldn't have done this; I noticed it had the words "current default" in its filename.
From that point on, FINDER shows the restored aperture library (actually two restored aperture libraries, since I accessed Time Machine a second time to restore an even older backed-up version) but of course, not the empty Library that had had "default" in its filename. And... I can no longer open Aperture.
Hope you can help me, thanks so much,
Glensdaughter

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 jvm maintains string pool only for string objects why not for other objects?

why jvm maintains string pool only for string objects why not for other objects? why there is no pool for other objects? what is the specialty of string?

rp0428 wrote:
You might be aware of the fact that String is an immutable object, which means string object once created cannot be manipulated or modified. If we are going for such operation then we will be creating a new string out of that operation.
It's a JVM design-time decision or rather better memory management. In programming it's quite a common case that we will define string with same values multiple times and having a pool to hold these data will be much efficient. Multiple references from program point/ refer to same object/ value.
Please refer these links
What is Java String Pool? | JournalDev
Why String is Immutable in Java ? | Javalobby
Sorry but you are spreading FALSE information. Also, that first article is WRONG - just as OP was wrong.
This is NO SUCH THING as a 'string pool' in Java. There is a CONSTANT pool and that pool can include STRING CONSTANTS.
It has NOTHING to do with immutability - it has to do with CONSTANTS.
Just because a string is immutable does NOT mean it is a CONSTANT. And just because two strings have the exact same sequence of characters does NOT mean they use values from the constant pool.
On the other hand class String offers the .intern() method to ensure that there is only one instance of class String for a certain sequence of characters, and the JVM calls it implicitly for literal strings and compile time string concatination results.
Chapter 3. Lexical Structure
In that sense the OPs question is valid, although the OP uses wrong wording.
And the question is: what makes class Strings special so that it offers interning while other basic types don't.
I don't know the answer.
But in my opinion this is because of the hybrid nature of strings.
In Java we have primitive types (int, float, double...) and Object types (Integer, Float, Double).
The primitive types are consessons to C developers. Without primitive types you could not write simple equiations or comparisons (a = 2+3; if (a==5) ...). [autoboxing has not been there from the beginning...]
The String class is different, almost something of both. You create String literals as you do with primitives (String a = "aString") and you can concatinate strings with the '+' operator. Nevertheless each string is an object.
It should be common knowledge that strings should not be compared with '==' but because of the interning functionality this works surprisingly often.
Since strings are so easy to create and each string is an object the lack ot the interning functionality would cause heavy memory consumption. Just look at your code how often you use the same string literal within your program.
The memory problem is less important for other object types. Either because you create less equal objects of them or the benefit of pointing to the same object is less (eg. because the memory foot print of the individual objects is almost the same as the memory footpint of the references to it needed anyway).
These are my personal thoughts.
Hope this helps.
bye
TPD

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.

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 for OS X (SE 6 to 1.6.0_43)?

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