Jvm and Jre being used.

Ok this is a biggy!
Firstly I need to know if i download j2sdk1.4.1_09 is that sufficient or is this just the update on jdk1.2.?
I had jdk1.2 on my computer and the compiler worked fine, but I couldn't launch applications. Then downloaded jre 1.5 _04 via a chat site.
This was saved in programme files and thereafter i could launch applications.
I am using an external ide called sciettila or sctte for short.
The problem is i acidentally deleted the jdk1.2. and
the obviously nothing worked. So i delted the jre as well and downloaded j2sdk 1.4. Set the paths up to what I thought was right.
When i complied it was complaining about the jvn.cgf file couldnt be found in programme files/java/jre1.5_04/bin/i384/jvm.cgf
So i adeded the path to point at the one that was under the j2sdk1.4 folder in c:/. It then went happily into the compiler but it just goes into what seems like an endless loop and i have toforce itto break out.
I then put the files for jre in the j2sdk file into jre1.5 ......now it says
main class not loaded?
Any suggestions........i'm really frustrated.

You mean java's byte code is not interpreted now ???Java code is typically no longer purely interpreted. Parts of it are interpreted, other parts are compiled to native code.
How are they doing it in different platforms?Similar but platform-dependent.
Where can i get more information on this???http://www.google.com/
when did things change? (1.5??)I think some versions of 1.1 included a JIT compiler, 1.2 definitely had it and when Suns mentions "HotSpot" they are always talking about conditionally compiling java byte code to native code for performance reasons.

Similar Messages

HT204053 We both use the same iPad my father and I as of today, because I am using it too from now on, but each time the ID & Password pops up it ask for his, how can I access mine, so it's my account and financials being used. Thanks to any of those gift

We both use the same iPad my father and I as of today, as is letting me use it too from now on (sweet! ), I do not want to make a mistake and accidently use my father's ID & passwords (dohh ), but each time the ID & Password pops up it ask for his (???), how can I access mine, so it's my account and financials being used. Thanks to any of those gifted with this knowlegde... AMAKANGAROO

In order to reliably save the info and be able to restore at a later date, you would need to use his AppleID.
Switch to it on iTunes, back the iPad up and confirm the backup exists (Preferences / Devices), then switch to yours, wipe the iPad and start afresh. Will also wipe his apps, as they are tied to the AppleID as well.

Term confusion: JVM and JRE

Could anyone clarify the terms JVM (Java Virtual Machine) and JRE (Java Runtime Environment)?
As far as I know, they mean the same thing and can be used interchangeably. Am I right?
(I am writing a paper which requires dead accurate use of technical terms.)

http://www.google.com/search?q=define%3Ajvm&sourceid=mo
illa-search&start=0&start=0&ie=utf-8&oe=utf-8
Here's one half of your search.Here's for people who would also like to know:
JVM
(JavaTM Virtual Machine) (n.) The part of the Java runtime environment (JRE) responsible for interpreting bytecodes.
JRE
(JavaTM runtime environment) (n.) A subset of the Java Development Kit (JDK) for users and developers who want to redistribute the runtime environment. The Java runtime environment consists of the Java virtual machine (JVM), the Java core classes, and supporting files.

Difference between JVM and JRE

Hi,
can anyone tell me if there is a difference between a JVM and a JRE?
I'm trying to use Excelsior JET to make windows executables from java classes. The documentation says that with JET you dont need the JVM but reading between the lines I think you do still need the Java JRE.
Are these different or the same thing?
Cheers,
Jim

JRE = JVM + classes and libs.

What is the difference between JVM and JRE and JDK?

Hi , I want to know what actually is JVM,JRE and JDK ? and the difference between them?

They should at least try. When it comes to
terminology, if they can find this site, they should
be able to find google, wikipedia, etc. It's
reasonable to expect them to try there first, and
then, if they still have questions, post here,
indicating what they looked at and how it fell short,
what they're still confused about, etc.Perhaps this is a valid point.
I believe physical JVM hardware has also been
manufactured. I wonder what we'd call that? A JPM
(Java Pysical Machine)?No. It is simply a hardware implementation of the abstract Java Virtual Machine.
.class files are executed by software (in fact,the
software that executes the .class files is calledthe
JRE and is short for the Java
Runtime Environment). The JavaRuntime
Environment is a native program (i.e. it is run by
hardware) which provides the ability to executejava
bytecodes (.class files)That's the JVM.No it's not. The JVM is an abstract architecture.
The JRE is the JVM plus native libraries plus core
API Java classes.The JRE is an implementation of the JVM along with some additional facilities. The JVM may be used to describe concrete implementations in industry vernacular, but this is not a technically accurate usage of the term per the specification and is therefore incorrect.
From the preface to the Java Virtual Machine Specification, Second Edition, viewable at http://java.sun.com/docs/books/jvms/second_edition/html/Preface.doc.html:
"The Java virtual machine is an abstract machine."
From Wikipedia (http://en.wikipedia.org/wiki/JVM):
"A Java Virtual Machine (JVM) is a set of computer software programs and data structures which implements a specific virtual machine model."
Perhaps this misconception is the source of the confusion. This is one reason why I answered deepakorsun rather than refer him to somewhere else: anywhere that would be reliable and/or completely accurate would be too dense to readily understand, and anywhere understood easily enough might not be completely accurate.
>
The Java Development Kit (JDK) just provides the
facilities necessary to write programs that willrun
on the Java Virtual Machine. It contains acompiler
It also contains tools such as jar and javap, the API
docs for the core API classes, the source code for
the API classes, probably a few other things, and
generally the JRE (though I'm not sure if that's
officially a required part of the JDK).I never said it didn't contain jar, javap, javac, java, jdb, jconsole, or any of the other programs or resources shipped with jdk. I simply stated affirmatively something it did contain. As I implied before, technical comprehensiveness is exactly what makes resources such as the JVM specification almost unusable for answering questions like this. That is why I omitted such details in my description. And since we're being all technical here, the API documentation does not ship with the Java Development Kit (at least not as of JDK 5.0), it is a separate download. It is the core API source files that ship in a .zip file with the JDK.
Don't get me wrong, I do understand that you have probably seen a lot more people come and go from these forums than I may ever understand and that you have helped more people than you can remember, and I don't mean to disrespect that. I understand that dealing with so many people over such a long period of time and hearing the same questions over and over again can probably start to wear on your patience, but I don't think the right approach is to treat anyone that tries to help them with utter contempt and sarcasm. That's not constructive or useful to anyone. I understand why you would be upset if somebody was purposely trying to be lazy, I probably would be too, but you have no real way of determining whether or not they are being lazy or just don't know something and don't know how to figure it out for themselves so they are asking a question. And if they are honestly just asking a question in good faith and looking up the answer on Wikipedia just did not occur to them (or they couldn't understand what it said), yet they somehow ended up on this site, they have done nothing wrong and there is no reason to get angry at them.
Oh come on, that wasn't nice. Not everybody isable
to answer their own questions. WTF are you talking about?!? Why waste the time to
type something out when they can click on a link and
find 1000 times more information than you can fit
into one post? Either way - they're
STILL going to have to read the
information themselves...
Ridiculous.So I suppose you've either read the Java Virtual Machine Specification, the Java Language Specification, and the Java Native Interface Specification in their entireties, or absolutely nothing about programming in Java. This is because, by your reasoning, these three books contain 1000 times more than anyone can fit on a tutorial, Wikipedia entry, mailing list, forum, blog, or anything else.
Criticizing somebody who isn't doing something the exact way you think it should be done is often quite idiotic and non-constructive. I believe this is this case here. Please post something more useful, meaningful, and/or polite next time. And just for future reference, yelling at a beginner does not help them learn faster or better. It just makes them hate you.
Oh come on, that wasn't nice. Not everybody isable
to answer their own questions. Java terminologycan
be confusing and difficult to understand in part
because of all the acronyms used and all the name
changes undergone by the various development kitsand
platforms.Point taken. You have much more patience than
I, but with lots of intensive therapy and proper
adjustment of my medications, I may get better.Thank you for this post. A display of wisdom and patience. You single handedly caused me to reconsider participating in a flame war.

Download jdk and jre relases using wget for debian linux

I am trying to help a friend and I am connecting via putty to his machine and want to get jre-6u4-linux-i586.bin. What address would I use because I tried:
wget http://cds.sun.com/is-bin/INTERSHOP.enfinity/WFS/CDS-CDS_Developer-Site/en_US/-/USD/VerifyItem-Start/jre-6u4-linux-i586.bin?BundledLineItemUUID=jt9IBe.loM8AAAEYLCM96leH&OrderID=yZ5IBe.lmN0AAAEYHSM96leH&ProductID=l6NIBe.nTU4AAAEYsP0wUUg2&FileName=/jre-6u4-linux-i586.bin
and that does not work for me.
TIA

Ur machine must be having a mirrorlist.txt file in ur /var/cahce/..... directory....
Try using it....
It has a list of mirrors / url's..
may be it will help u

What is the difference between JVM and JRE

hello everyone,
a funny but really confusing question is that how a virtual machine is different from a runtime environment.
some may argue that RE contains the API classes and implementations etc. but i need some real picture of what is the actual difference and anything related to this topic.
thanks,
waiting for your responses :-)

The Java Virtual Machine forms part of a large system, the Java Runtime Environment. Each operating system and CPU architecture requires a different JRE.
The JRE comprises a set of base classes, which are an implementation of the base Java API, as well as a JVM.

What is the difference between the JVM and JRE?

The reason I ask is becuase I have heard of conflicting JVM if you attempt to keep more than JDK on your comp. I don't know if I unistalled the JVM, so that is why I am asking.

There was a little discussion about this some time ago:
http://forum.java.sun.com/thread.jsp?forum=54&thread=177864
Basically, it seems that the JRE is the JVM plus some support classes.
When you install the JDK or SDK as it is now known, you almost certainly also installed the latest JRE (I forget whether there is an option of whether to do so).
If you are planning to remove an old JRE or JDK it is best to do so before installing the new one. If you haven't, and you aren't getting conflicts, maybe it's best to leave well alone if you can afford the disk space.

Firefox and JRE to use

Hi,
we need to run a website containing a JRE 1.5 Java Applet on a customers Windows system where Java 1.4 has been installed. Since it is not possible for us to get Java updated within the next months, some question concerning possible workarounds arose:
1. Is there any chance to get Firefox 3 to run with a certain JRE located in a local directory (without installing that JRE)?
2. Is there a Firefox plugin (similar to VB's System.Windows.Forms.WebBrowser) I could use within a .exe file where I can specify the JRE to be used (without installing that JRE)?
Thank you very much for your answers !!!

Thank you for your response, cor-el. I was able to successfully add the JRE 1.7 plugin to Firefox by modifying the existing JRE 1.6 registry entries, but I would not recommend this procedure to users that are less confident in registry editing. Too bad there is not a more user friendly way to do this.
Unfortunately the Java applet I'm trying to view is still not displayed. I've dug a bit deeper and found that the applet explicitly specifies an older JPI version (1.5.0_02). AFAIK Firefox cannot deal with this if its installed JPI (now 1.7.0_21) does not match the version requested. So either I'm going to have to dig up this older JPI version and install that too, or just switch to an alternative browser to be able to view this applet.

Is there a conflict between Reader XI and Acrobat being used on the same computer?

I downloaded the new Abode Reader XI. The computer in question has, also, Adobe Acrobat 7. Is there a conflict between them if used on the same computer? I can not open any PDFs and now the saved PDFs I had on the computer will not open and the icon shown on the desktop is gone. Please advise as I scan documents to this computer all the time and the person who needs to see them can not.

I have Acrobat 8.1.6 and Reader XI on Win XP. Do these conflict? Should I get rid of the newer Reader?
I'm having problems printing to the PDF print driver, locks up system, shows printer offline in spooler. I doubt problem is with driver itself because I can print a Test Page from it ok. But printing to Adobe PDF from Word & other apps locks up & never completes.
There's an Exclamation Point next to Acrotray in Explorer. (see image) What does this mean??
Have tried Repair install of Acrobat twice.

How to get table and column names thats being used in SQL , that's generating all my reports on SSRS.

Good day,
I searched through the forum and cant find anything.
I have around 300 published reports on SSRS and we are busy migrating to a new system.
They have already setup their tables on the new system and I need to provide them with a list of table names and column names that are being used currently to generate the 300 reports on SSRS.
We use various tables and databases to generate these reports, and will take me forever to go through each query to get this info.
Is it at all possible to write a query in SQL 2008 that will give me all the table names and columns being used?
Your assistance is greatly appreciated.
I thank you.
Andre.

There's no straightforward method for that I guess. There are couple of things you can use to get these details
1. query the ReportServer.dbo.Catalog table
for getting details
you may use script below for that
http://gallery.technet.microsoft.com/scriptcenter/42440a6b-c5b1-4acc-9632-d608d1c40a5c
2. Another method is to run the reports and run sql profiler trace on background to retrieve queries used.
But in some of these cases the report might be using a procedure and you will get only procedure. Then its upto you to get the other details from procedure like tables used, columns etc
Please Mark This As Answer if it helps to solve the issue Visakh ---------------------------- http://visakhm.blogspot.com/ https://www.facebook.com/VmBlogs

Windows XP style and JRE 5 update 9,10 and JRE 6.0 problem

Good day.
I have an application that is deployed on more than 700 PCs in different countries. Application is being deployed via Java Web Start and is being used by our clients for more than 3 years already.
Today we are receiving more and more complains coming from our clients because of application GUI misbehavior. What happens is this. When JRE on the client PC is updated to JRE 5 update 9 or update 10 or re-installed to Java 6 AND Windows XP Theme is applied then most of the Elements(JCheckBox, JRadioButton, JTextField become larges and etc.) on JToolBar disappear. If Windows XP Theme is changed to Classic everything gets to normal.
On JRE 5 update 1 up to update 6 User Interface works fine even with Windows XP Theme applied.
Application GUI is build using Borland JBuilder GUI Designer.
Please, please advise where could be the problem.
Thank you very much!

Good day.
I have an application that is deployed on more than 700 PCs in different countries. Application is being deployed via Java Web Start and is being used by our clients for more than 3 years already.
Today we are receiving more and more complains coming from our clients because of application GUI misbehavior. What happens is this. When JRE on the client PC is updated to JRE 5 update 9 or update 10 or re-installed to Java 6 AND Windows XP Theme is applied then most of the Elements(JCheckBox, JRadioButton, JTextField become larges and etc.) on JToolBar disappear. If Windows XP Theme is changed to Classic everything gets to normal.
On JRE 5 update 1 up to update 6 User Interface works fine even with Windows XP Theme applied.
Application GUI is build using Borland JBuilder GUI Designer.
Please, please advise where could be the problem.
Thank you very much!

What JVM is being used in my Internet Explorer ?

I have a web-bases/java-bases application that does not work when JRE 1.4 is active.
I disable it for Internet Explorer in the Java Plug-In Console on the Browser tab and then things work fine.
How do I know what JVM is being used then ?
Some configuration info :
WinME, IE 6.0, JRE 1.4

When you install JRE1.4.0, it asks if you want to link the JRE to IE and Netscape 6...if you answered yes, what it does is to create and automatically select a new option box in IE (see Tools-->Internet Options-->Advanced-->Java Sun-->Use JRE1.4.0...) -- if you elected not to link the JRE, the option box is not created.
Without the new option box, IE works like this:
1) Unless the applet has been converted with the HTMLConverter that comes with your SDK, IE will run the applet with its native JVM which is version 1.1.5.
2) If the HTML file has been converted, IE will check to see what version of the JRE is required and what is already on the system. If a different JRE is required, it will prompt the user to download the required JRE and then run the applet -- if the user doesn't want to do the download, the applet will simply fail to start.
Hope this helps!
;o)
V.V.

Which JRE is being used??

Recently I was assigned to take care of a web application developed by JSP, Javascript, struts & EJB. The source codes are compiled into different WAR, JAR and EAR files by using JDK 1.4.2_03. The App Server being used is JBOSS 3.2.3. I hava a lot of questions concerning the application in my mind. Here are some of them, Can anyone please help:
(1) From the Java Forums, I know that java applications need JRE to run. But I don't see the web application force me to install any JRE when I try to access it via IE6. Why?
(2) Is there any way (e.g. bat script) that I can know which JRE the web application is using? Can you provide me with some code samples?
(3) I read an artricle somewhere saying that JRE can be bundled to a web application. How can I now whether the JRE 1.4.2_03 is being bundle with my web application?
(4) Since the application is compiled by JDK 1.4.2_03, is this a must to use the JRE 1.4.2_03 only?
Thanks

Hi,
All Java compatible web/application servers like Tomcat/Weblogic/Websphere/JBoss ......have build-in JRE. That u dont need to care. You can find the version of jvm ....from the servers's Readme files and and the corresponding documents.
If your java application works fine with the web/app server means, the JRE is already installed.
Bye

How can I activate an old version of Photoshop that I've loaded on my new tablet? The web activation doesn't work, and when I call the number, it says it's not being used anymore. Meanwhile, I'm down to 13 days till it stops working due to not being activ

How can I activate an old version of Photoshop that I've loaded on my new tablet? The web activation doesn't work, and when I call the number, it says it's not being used anymore. Meanwhile, I'm down to 13 days till it stops working due to not being activated. HELP? I really need to continue using this product for my home business.It works fine not activated but the threat is that it will stop working in 13 more days if I don't get it activated, and none of the activation methods they list seem to work.

The new serial number is to the right of your chosen download.

Jvm and Jre being used.

Similar Messages

Maybe you are looking for