Why can't install Java Virtual Machine (JVM) in my PC?

I can't install JVM in my PC with win2000 OS. After download the JVM from java.sun.com,the microsoft OS installor dispaly it's status is the the last step --install JVM in PC.But there is no any response from the installor hourly.The task manager of OS showed the installor was running at all times.what matter?

Yes,I logined in my PC as administrator.Today,I find there is the program Java 2 Runtime Environment,SE v1.4.2_04 in Control Panel.If it means JRE installed already,but why the installation window keep on running status all the time,and can't be closed? Is it a bug?

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How do I enable Java Virtual Machine (JVM)? I upgraded yesterday and somehow it became disabled.

I upgraded to newest version yesterday and when I went to a government site today, it tells me I have no access until I enable Java Virtual Machine (JVM). How do I do this??? (I did access this site by using Internet Explorer - but I much prefer Firefox)

If you updated from a Firefox version prior to Firefox 3.6, the version of Java that you have installed is not being recognized. Firefox 3.6 and later requires Java 1.6.0.10 or higher; you have Java 1.6.0.05
'''''Other Issues''''': ~~red:You have installed plug-ins with known security issues. You should update them immediately.~~
'''Update Java''': your ver. 1.6.0.~~red:05~~; current ver. 1.6.0.20 (important security update 04-15-2010)
(~~red:Firefox 3.6 and above requires Java 1.6.0.10 or higher~~; see: http://support.mozilla.com/en-US/kb/Java-related+issues#Java_does_not_work_in_Firefox_3_6 )
''(Windows users: Do the manual update; very easy.)''
~~red:Check your version here~~: http://www.mozilla.com/en-US/plugincheck/
See: '''[http://support.mozilla.com/en-US/kb/Using+the+Java+plugin+with+Firefox#Updates Updating Java]'''
Do the update with Firefox closed.
'''NOTE:''' Java version 1.6.0.21 has been released. It is mainly an update for developers of Java applications and most users do not need to be concerned about downloading version 1.6.0.21. '''''At this time''''', the update option in existing installations of Java 1.6.0.20 are not updating to version 1.6.0.21; '''''at this time''''', it must be manually downloaded and installed. According to the Java release notes:
''"'''Bug Fixes'''''
''Java SE 6 Update 21 does not contain any additional fixes for security vulnerabilities to its previous release, Java SE 6 Update 20. Users who have Java SE 6 Update 20 have the latest security fixes and do not need to upgrade to this release to be current on security fixes."'' Source: http://java.sun.com/javase/6/webnotes/6u21.html

Can we install Oracle Virtual Machine in OEL-5?

Hi Forum Mates
Can i install Oracle Vm in OEL-5 and install OEL-5 in VM too?
I want practice database concepts like networking,dblinks,cloning etc?
can i install windows 7 in vm and practice migration of database from windows to linux.
my desktop is intel core 2 duo and 4gb ram is it enough?
thank you

Can I install Oracle VM in OEL-5 and install OEL-5 in VM too?Sure.
Can I install windows 7 in VM and practice migration of database from Windows to Linux.Yes, if you have a spare Windows 7 license :)
My desktop is Intel Core 2 Duo and 4GB RAM is it enough?Probably not if you want the two VMs running at the same time. Maybe try 8GB.

Jvm-java virtual machine

Hai iam new to this forum and as well i just started to learn java iwant to know in brief about JVM
i think it may be silly question but as i am bigginer to java kindly expect reply

georgemc wrote:
faustofrancis wrote:
A Java Virtual Machine (JVM) is a set of computer software programs and data structures which use a virtual machine model for the execution of other computer programs and scripts. The model used by a JVM accepts a form of computer intermediate language commonly referred to as Java bytecode. This language conceptually represents the instruction set of a stack-oriented, capability architecture.
Java Virtual Machines operate on Java bytecode, which is normally (but not necessarily) generated from Java source code; a JVM can also be used to implement programming languages other than Java. For example, Ada source code can be compiled to Java bytecode, which may then be executed by a JVM. JVMs can also be released by other companies besides Sun (the developer of Java) -- JVMs using the "Java" trademark may be developed by other companies as long as they adhere to the JVM specification published by Sun (and related contractual obligations).
The JVM is a crucial component of the Java Platform. Because JVMs are available for many hardware and software platforms, Java can be both middleware and a platform in its own right  hence the expression "write once, run anywhere." The use of the same bytecode for all platforms allows Java to be described as "compile once, run anywhere", as opposed to "write once, compile anywhere", which describes cross-platform compiled languages. The JVM also enables such unique features as Automated Exception Handling which provides 'root-cause' debugging information for every software error (exception) independent of the source code.
The JVM is distributed along with a set of standard class libraries which implement the Java API (Application Programming Interface). The virtual machine and API have to be consistent with each other[dubious  discuss] and are therefore bundled together as the Java Runtime Environment.
Execution environment
Programs intended to run on a JVM must be compiled into a standardized portable binary format, which typically comes in the form of .class files. A program may consist of many classes in different files. For easier distribution of large programs, multiple class files may be packaged together in a .jar file (short for Java archive).
The JVM runtime executes .class or .jar files, emulating the JVM instruction set by interpreting it, or using a just-in-time compiler (JIT) such as Sun's HotSpot. JIT compiling, not interpreting, is used in most JVMs today to achieve greater speed. Ahead-of-time compilers that enable the developer to precompile class files into native code for a particular platform also exist.
Like most virtual machines, the Java Virtual Machine has a stack-based architecture.
Although the JVM was primarily aimed at running compiled Java programs, other languages can now run on top of it[1], such as:
* Ruby, with JRuby
* JavaScript, with Rhino
* Python, with Jython
* Common Lisp, with Armed Bear Common Lisp
* Groovy
* Scala
[edit] Bytecode verifier
A basic philosophy of Java is that it is inherently "safe" from the standpoint that no user program can "crash" the host machine or otherwise interfere inappropriately with other operations on the host machine, and that it is possible to protect certain functions and data structures belonging to "trusted" code from access or corruption by "untrusted" code executing within the same JVM. Furthermore, common programmer errors that often lead to data corruption or unpredictable behavior such as accessing off the end of an array or using an uninitialized pointer are not allowed to occur. Several features of Java combine to provide this safety, including the class model, the garbage-collected heap, and the verifier.
The JVM verifies all bytecode before it is executed. This verification consists primarily of three types of checks:
* Branches are always to valid locations
* Data is always initialized and references are always type-safe
* Access to "private" or "package private" data and methods is rigidly controlled.
The first two of these checks take place primarily during the "verification" step which occurs when a class is loaded and made eligible for use. The third is primarily performed dynamically, when data items or methods of a class are first accessed by another class.
The verifier permits only some bytecode sequences in valid programs, e.g. a jump (branch) instruction can only target an instruction within the same function or method. Because of this, the fact that JVM is a stack architecture does not imply a speed penalty for emulation on register-based architectures when using a JIT compiler. In the face of the code-verified JVM architecture, it makes no difference to a JIT compiler whether it gets named imaginary registers or imaginary stack positions that need to be allocated to the target architecture's registers. In fact, code verification makes the JVM different from a classic stack architecture whose efficient emulation with a JIT compiler is more complicated and typically carried out by a slower interpreter.
Code verification also ensures that arbitrary bit patterns cannot get used as an address. Memory protection is achieved without the need for a MMU. Thus, JVM is an efficient way of getting memory protection on simple architectures that lack an MMU. This is analogous to managed code in Microsoft's .NET CLR, and conceptually similar to capability architectures such as the Plessey 250, and IBM System/38.
[edit] Bytecode instructions
Main article: Java bytecode
The JVM has instructions for the following groups of tasks:
* Load and store
* Arithmetic
* Type conversion
* Object creation and manipulation
* Operand stack management (push / pop)
* Control transfer (branching)
* Method invocation and return
* Throwing exceptions
* Monitor-based concurrency
The aim is binary compatibility. Each particular host operating system needs its own implementation of the JVM and runtime. These JVMs interpret the byte code semantically the same way, but the actual implementation may be different. More complicated than just the emulation of bytecode is compatible and efficient implementation of the Java core API which has to be mapped to each host operating system.
[edit] Secure execution of remote code
A virtual machine architecture allows very fine-grained control over the actions that code within the machine is permitted to take. This is designed to allow safe execution of untrusted code from remote sources, a model used by Java applets. Applets run within a VM incorporated into a user's browser, executing code downloaded from a remote HTTP server. The remote code runs in a restricted "sandbox", which is designed to protect the user from misbehaving or malicious code. Publishers can purchase a certificate with which to digitally sign applets as "safe", giving them permission to ask the user to break out of the sandbox and access the local file system and network...
[edit] C to bytecode compilers
From the point of view of a compiler Java bytecode is just another processor with an instruction set for which code can be generated. The JVM was originally designed to execute programs written in the Java language. However, the JVM provides an execution environment in the form of a bytecode instruction set and a runtime system that is general enough that it can be used as the target for compilers of other languages.
Because of its close association with Java the JVM performs the runtime checks mandated by the Java specification. This can make it technically difficult to translate C code (which is much more lax with regard to runtime checking) to the JVM and expect it to run without issuing any warnings.
Compilers targeting many different languages, including Ada and COBOL, have been written.
[edit] Licensing
Starting with J2SE 5.0, changes to the JVM specification have been developed under the Java Community Process as JSR 924[2]. As of 2006, changes to specification to support changes proposed to the class file format (JSR 202[3]) are being done as a maintenance release of JSR 924. The specification for the JVM is published in book form,[4] known as "blue book". The preface states:
We intend that this specification should sufficiently document the Java Virtual Machine to make possible compatible clean-room implementations. Sun provides tests which verify the proper operation of implementations of the Java Virtual Machine.
Sun's JVM is called HotSpot. Clean-room Java implementations include Kaffe and IBM J9. Sun retains control over the Java trademark, which it uses to certify implementation suites as fully compatible with Sun's specification.
[edit] See also
* HotSpot, Sun's Virtual Machine
* Da Vinci Machine, a starting Sun project aiming to prototype the extension of the JVM to add support for dynamic languages.
* List of Java virtual machines
* Automated Exception Handling
* Common Language Runtime
* Parrot virtual machine
* Java bytecode
* Class (file format)
* Java performance
* List of compilers
[edit] Notes
1. ^ Tolksdorf, Robert (2005). Languages for the Java VM. Retrieved on 2008-04-23.
2. ^ JSR 924  Specifies changes to the JVM specification starting with J2SE 5.0
3. ^ JSR 202  Specifies a number of changes to the class file format
4. ^ The Java Virtual Machine Specification (the first and second editions are also available online)
[edit] References
* Clarifications and Amendments to the Java Virtual Machine Specification, Second Edition includes list of changes to be made to support J2SE 5.0 and JSR 45
* JSR 45  Specifies changes to the class file format to support source-level debugging of languages such as JSP and SQLJ that are translated to Java
[edit] External links
* The Java Virtual Machine Specification
* Java-Virtual-Machine.net - All about Java Virtual Machines!
* List of languages which compile to the Java virtual machine.
* A decade after Java arrived, there have been improvements in the runtime performance of platform-independent virtual-machine based software.
* Kaffe.org - the Kaffe project
* JamVM - The Jam Virtual Machine
* The lean, mean, virtual machine - An introduction to the basic structure and functionality of the Java Virtual Machine
* Java Glossary - installing Java useful tips for installing Java for users and developers
* Test your Java Virtual Machine
* A list of Java VM-s used in mobile devices
* More Languages for the JVM
* Sun to build virtual machine for iPhone - ComputerWorldAre you aware that Wikipedia has ripped off your post?not yet?
Let me see if the systems work!

How does JVM (Java Virtual Machine) relate to XI?

Can somebody describe to me exactly what JVM (Java Virtual Machine) is and how it is related/associated to XI? Responses are appreciated, thanks in advance!

HI,
A Java Virtual Machine (JVM), is a virtual machine that interprets and executes Java bytecode. This code is most often generated by Java language compilers, although the JVM can also be targeted by compilers of other languages. JVMs may be developed by other companies as long as they adhere to the JVM standard published by Sun.
The JVM is a crucial component of the Java Platform. Because JVMs are available for many hardware and software platforms, Java can be both middleware and a platform in its own right - hence the expression "Write once, run anywhere." The use of the same bytecode for all platforms allows Java to be described as "Compile once, run anywhere", as opposed to "Write once, compile anywhere", which describes cross-platform compiled languages.
Starting with J2SE 5.0, changes to the JVM specification have been developed under the Java Community Process as JSR 924[1]. As of 2006, changes to specification to support changes proposed to the class file format (JSR 202[2]) are being done as a maintenance release of JSR 924. The specification for the JVM is published in book form[3], known as "blue book". The preface states:
We intend that this specification should sufficiently document the Java Virtual Machine to make possible compatible clean-room implementations. Sun provides tests which verify the proper operation of implementations of the Java Virtual Machine.
Sun's JVM is called HotSpot. Clean-room Java implementations include Kaffe and IBM's. Sun retains control over the Java trademark, which it uses to certify implementation suites as fully compatible with Sun's specification
we have two caches JAVA,ABAP.
i mean all objects which will execute in JAVA Cache those need the JVM.
Regards
Chilla

Wondering about java virtual machine

hey i just need to download and install java virtual machine so i can chat on this certain page. i tried doing the chat, and it tried downloading what i need, but that didnt work, the download box just completes the download and then nothing happens. someone please help an idiot trying to chat. thanks.

Go here: http://java.sun.com/getjava/ follow the instructions and then try the chat page again (I'm assuming it's a webpage with a chat applet).

Terminates all java virtual machine process

How I can terminate all java virtual machine process which is running on a computer
thanks
daniel

Too big topic to cover. Check out
http://java.sun.com/j2se/1.3/docs/guide/intl/fontprop.html
namely Specifying Fonts on Win32 Platform
(http://java.sun.com/j2se/1.3/docs/guide/intl/fontprop.html#win32)

Java virtual machine error: in running bat file!!!

Hi experts!
I have encounterd a problem . Could not figure out why I am having this. I hope at least I will get a clue /suggestion from any of you.
I am creating a bat file from my java Application. Then I double click on the newly created bat file to run that. It gives me Java virtual machine launcher error:" could not find the main class, Progam will exit". I have a VB script, that also create the same bat file. but I dont have problem running that file manually. Even if I create the bat file manually(by typing), it ran well. It shows the error mesage only when I create bat file from my java Application. Instead of running the bat file manually, I tried to run it through my java application too(by Runtime.exec() ). But it shows me the same error msg.
Why am I getting java virtual machine launcher error when I tried to run my bat file that is created from java Application? ANy clue? Please suggest me about how to resolve this.
Regards

Probably because (despite what you say) the contents of the bat file created by your Java application aren't the same as the contents of those other bat files.Yes contents are same. I create the bat file from my java Application. then I am trying to run that bat file manually. It gives me the specified error. But if I create the bat file manually (with the same content) and then run it manually. It works well.
Any clue/suggestion

Message "Failed to create Java Virtual Machine" while installing HANA Studio with SP08

Installing HANA Studio with SP08 but getting error as follows:
HANA Version
Errors:
System Info : Win7(32 bit ), 2GB RAM, 500GB HDD

Not same case but related with Java: 32Bit VI Java Virtual Machine error
In this discussion Hanry Banks answers as follows:
1. Did you install using "Run As Administrator"?
2. In your Advanced System Properties, Go to Environment Variables > System Variables
Look for the 'Path' variable. It should include the following values: C:\Program Files\Java\jre6\bin
In the same area, look for the 'JAVA_HOME' variable. It should point to C:\Program Files\Java\jre6
- Can you confirm?
3. Also go Control Panel > Java > Java Control Panel > Java tab > View > User > Path. It should point to C:\Program Files\Java\jre6\bin\javaw.exe .
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How much memory is available on your machine as you launch? Go to: Task manager > Performance > Physical Memory > Available (MB)

Install of SAP HANA Studio Dev Ed v1.00.80 fails with "Could not create the Java Virtual Machine"

Hello,
Scope: JVM error during initial install of SAP HANA Studio Developer Edition v1.00.80, Win86/32bit
Source: installation files pulled from HANA Studio tab at https://hanadeveditionsapicl.hana.ondemand.com/hanadevedition/, which is a link from the main HANA site of http://scn.sap.com/community/developer-center/hana. zip folder: "sap_hana_win32_studio_rev80"
Targeted O/S: Windows 7, 32-bit, local Java is SE 7, update 67.   Java environment has been confirmed via checks provided at http://www.java.com/en/download/manual.jsp
Actions taken:
Attempted to update the installation's eclipse.ini file by reducing the -Xmx value; see details below.
Read thru postings such as http://scn.sap.com/thread/3390626 and the threads it recommended.
Checked OSS (ie Note 1859686 - HANA Studio does not start)
Description of installation error:
Shortly after executing "hdbinst", it fails with the error "Could not create the Java Virtual Machine". I've verified that there is nearly 3G of memory free. What I did notice, as shown in the attached files, is that Eclipse is part of this installation and it's pre-loaded with the "eclipse.ini". I firmly believe the solution could be to reduce parameter "-Xmx1024m" to "-Xmx512m" but it's a catch-22 because even after updating eclipse.ini (in installation folder C:\Program Files\SAP\hdbstudio\tmp_p2director2014.08.13_13.36.44\director), the install program requires that the "hdbstudio" folder to be empty upon restarting it.
Since the installation is basically a package with a lot of .jar files, there is no eclipse.ini file available in the source install folder; otherwise, updating it there would be the easiest solution if that option were available. The file is only available in the targeted deployment folder above.
If you have encountered this same error and were able to resolve it, I would be grateful to know of your solution. Thanks very much.
FYI: the HANA Client installed with no issues.
Jim Cleek
FYI: the images below reflect the sequence of images produced during the installation.
after clicking OK above, the screen below gets updated (see the "is not empty" msg).
Below is the eclipse.ini file located in the deployed/target folder:
Message was edited by: Jim Cleek
FYI: Using information from the SAP HANA Database - Studio Installation and Update Guide, I tried to override the installation's use of its eclipse.ini file by passing my own modified version (with "-Xmx512m") of that file that was placed in a separate folder. The cmd used via DOS window was "hdbsetup.exe -a studio --configfile=C:\Users\Admin\Downloads\eclipse.ini" and even though it successfully launched the SAP HANA Lifecycle Management gui, it failed on the first step with the same JVM create error as above because it appears to have used its own eclipse.ini file, which has "-Xmx1024m".

Update: a message was opened with SAP but unfortunately they could not provide a resolution for this particular scenario. They admitted that the eclipse.ini file cannot be updated since it is bundled as part of the installation package. One point to make that I did not make before was that this was being attempted on an Oracle VirtualBox (4.3.10); the SAP HANA contact said he assumed that SAP has not tested this particular scenario, thus it could not be supported.
Resolution: the end result was to abort trying to install SAP HANA Client and Studio on the Oracle VirtualBox but to install it locally on my own desktop, which runs on Windows 7 Enterprise 64-bit with 8G of memory. The SAP HANA files below were downloaded, extracted and installed successfully in the order shown.
FYI: the Studio installation detected that a 64-bit version of Java was not installed so I installed that and then adjusted the User environmental variable JAVA_HOME to point to that new path, leaving the System variable still pointing to the pre-existing 32-bit Java path.
SAPCAR 7.20 -> Windows on x64 64bit: SAPCAR_315-20010453.EXE
IMDB_CLIENT100_80_0-10009664.SAR   Revision 80 for SAP HANA CLIENT 1.00
Support Package SAP HANA CLIENT 1.00 Windows on x64 64bit
IMC_STUDIO100_80_0-20007647.SAR   Revision 80 for SAP HANA STUDIO 1.00
Support Package SAP HANA STUDIO 1.00 Windows on x64 64bit
jre-7u67-windows-x64.exe - http://www.oracle.com/technetwork/java/javase/downloads/jre7-downloads-1880261.html
Jim Cleek
HP Enterprise Services

JAVA Importer: ORA-105100 can't start the java virtual machine

Hi,
i am having trouble to make a work interaction between forms and java.
My PL/SQL code is calling a java code situated in an imported class.
the error i get says : can't start the java virtual machine
I modified the CLASSPATH to add some jar files.
What else should i do ?
should i modify LIBPATH ?
any idea ?
Thanks
Dan

i just found this documentation Oracle Forms Developer and Forms Server 6i (Patch 4) at this adress
http://download.oracle.com/otn_hosted_doc/forms/forms/p4_relnotef.pdf
which says that i need jdk 1.2.2 to make it work but the documentation was published in 2001...
Is there an earlier doc ? or an earlier doc of the java importer ?
http://www.oracle.com/technology/products/forms/pdf/javaimporter.pdf
any help would be appreciated

How can I know the version of Application Server Java Virtual Machine

How can I know the version of Application Server Java Virtual Machine?
Thanks a lot.

Thats easy. Your jdk/jre are located in the App Server home directory. Just run the java command under the jdk directory with the "-version" switch and it will provide you with detailed information about your VM.
For example if you're doing it at command prompt it will be something like
java -versionI hope this will be useful to you.
Regards,
Wasif

Error while installing SOA, "Could not create java virtual machine"

I am trying to install SOA latest release, but am getting an error stating "Could not create java virtual machine" and just that. No log, nothing. Could anybody help me out on this?

Is JRE installed on your machine?
If yes it may get corrupted, try to remove and reinstall jre again. Then try to install SOA.

Java virtual machine very slow: why?

Since I have upgraded Tiger to Leopard, the startup of the Java virtual machine is unbelievably slow: for example, just executing java -version for the first time requires almost one minute. This happens only the first time the JVM is started: after that, everything seems to work properly. Any idea of what is the problem? Thank you.

I don't have this problem at all.
Which version of Unix are you using? And which version of Java are you using on the Unix computer? How old is your Computer?

I have updated my iTunes to the newest version, 10-25 on a windows XP system. Now my java virtual machine is not working and I need it to run applet window. My Java is also newest version. What can I do to fix/repair my issue?

I need help with java on windowsXP after updating iTunes to the latest version. My java will not work and I get error message need java virtual machine to run applet window. Did not have this problem prior to the iTunes update.
Please help, Thanks

If your library was working on your computer and then popped up empty all of a sudden then this might be what you need...
Empty/corrupt library after upgrade/crash
Hopefully it's not been too long since you last upgraded iTunes, in fact if you get an empty/incomplete library immediately after upgrading then with the following steps you shouldn't lose a thing or need to do any further housekeeping. In the Previous iTunes Libraries folder should be a number of dated iTunes Library files. Take the most recent of these and copy it into the iTunes folder. Rename iTunes Library.itl as iTunes Library (Corrupt).itl and then rename the restored file as iTunes Library.itl. Start iTunes. Should all be good, bar any recent additions to or deletions from your library.
See iTunes Folder Watch for a tool to catch up with any changes since the backup file was created.
When you get it all working make a backup!
tt2

Why can't install Java Virtual Machine (JVM) in my PC?

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