JRE Vs SDK

When there is a option for downloding the Java Standerd Edition Pacakges WE have these 2 options JRE and SDK could I know what does these mean.
.................................ABHI

FST--Thnx for the help.
Do u mean that if some feels that he might use some programs which uses java and needs an environment which runs it He has to install JRE else a developer has to install SDK is it?
.....................ABHI

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JRE or SDK install problem - installing in non-std dir

I'm encountering a problem trying to install either the JRE or SDK into a non-standard directory (one that's not the default of c:\j2sdk1.4.2_01 or what have you). This is occuring with both 1.4.2_01 and 1.4.2_02.
In this case, I'm trying to install it in a directory similar to c:\progra~1\compan~1\produc~1\jre. (Short names b/c I can't figure out how to do long paths silently, but that's a whole different issue).
The install nears the end and then presents the user with a "Java(TM) Update (1.4.2_01-b06) cannot be installed on this machine because the Java(TM) Virtual Machine is currently running. Please close all running Java(TM) applications, especially browsers. [RETRY] [CANCEL]" message.
There's definitely not a JVM running at the moment. If I click Cancel, the install finishes up and there is a workable install there. But why the prompt? Since this is a silent install within another install, it will cause concern for my customers.
The last few lines of my setup file:
Action start 19:16:59: removesdkpackfiles.
Action ended 19:17:00: removesdkpackfiles. Return value 1.
Action start 19:17:00: unzipdemos.
Action ended 19:17:15: unzipdemos. Return value 1.
Action start 19:17:15: copysrczip.
Action ended 19:17:19: copysrczip. Return value 1.
Action start 19:17:19: patchsdk.
Error 1722.There is a problem with this Windows Installer package. A program run as part of the setup did not finish as expected. Contact your support personnel or package vendor. Action patchsdk, location: C:\Program Files\Common Files\Java\Update\Base Images\j2sdk1.4.2-b28\patch-j2sdk1.4.2_02-b03\patchsdk.exe, command: -s "C:\PROGRA~1\COMPAN~1\PRODUC~1\jre\"
Action ended 19:17:35: patchsdk. Return value 3.
Action ended 19:17:35: INSTALL. Return value 3.
=== Logging stopped: 10/23/2003 19:17:35 ===
The command line to kick off the install:
j2sdk-1_4_2_02-windows-i586-p.exe /s /v\"/qn ADDLOCAL=ALL IEXPLORER=1 INSTALLDIR=c:\progra~1\compan~1\produc~1\jre /L \jresetup.log"
Has anyone encountered this? I've narrowed it down to the fact that it's an install into a directory that's not the default. If I run the install without specifying the INSTALLDIR, everything works fine. Help is appreciated!

See the original posting and comments in http://forum.java.sun.com/thread.jsp?forum=14&thread=462167 and the bug http://developer.java.sun.com/developer/bugParade/bugs/4953793.html
Rebooting has no effect whatsoever on this problem; even if you can now get the SDK installed, a non-administrative account won't be able to use the JRE in it, nor will the user be able to use the other JRE installed in the default location.

Download J2SE - what's JRE and SDK

Hi
when I want to download the J2S� 1.4.1, I can choose JRE and SDK.
What's what and what's the difference?
RB

If you only want to use Java programs, get the JRE.
If you want to develop Java programs, get the SDK.

J2SE download page: JRE and SDK differences

when we go to the J2SE download page: http://java.sun.com/j2se/1.4.1/download.html#docs, we will see JRE and SDK column. What are the differences??
My guess is:
JRE just download the java runtime environment, without downloading the java compiler. JRE means the JVM here?
SDK downloads everything, including the compiler and run time environment.

when we go to the J2SE download page:
http://java.sun.com/j2se/1.4.1/download.html#docs, we
will see JRE and SDK column. What are the
differences??
My guess is:
JRE just download the java runtime environment,
without downloading the java compiler. JRE means the
JVM here?
SDK downloads everything, including the compiler and
run time environment.SDK is a development kit, where You have java compiler and all the rest +
jre.

JRE, JDK, SDK, IDE, J2????

What is the disctinction between all these acronyms and when would they come in handy?
JRE
JDK
SDK
IDE
Java2 versus JDK1.4 (what's the difference)

JRE = Java Runtime Environment. Let's you run java apps/applets by interpreting the compiled java code supplied to you.
JDK/SDK = Java Development Kit/Software Development Kit = One in the same...has both the JRE and tools (compiler, etc) to actually compile your own java code.
IDE = Integrated Development Environment - Usually consists of an editor, project manager, graphical development tools to speed up development of code. This is not necessarily java - there are IDE's for C/C++, etc....
Java2 - Post java 1.1 version of java ... components usually start with a J...like JPanel, JButton, JList. A layer built over the original AWT (abstract window toolkit) that was java 1.1. Java 2 is not supported by most browsers by default without the plugin (the JRE)...Netscape 6 has it tho it's buggy.
JDK 1.4 is the latest version of Java2.

Stupid Question: ... difference between JRE and SDK ?

Beginers Question,
Please describe what is Sun Java JRE and SDK.

The JRE is the Java Runtime Environment, and is what is needed to run Java programs. It includes the JVM and the standard libraries.
The SDK is the Software Development Kit, and is what is needed to develop Java programs. It includes the JRE and developer tools such as the compiler.

Difference between, jre, jdk, sdk and j2se

Dear Sir/Madam,
I want to do some java and j2ee development and run these applications in a java application server environment. Can anyone give me some advices on what should i need to download? Moreover, what is the difference between, jre, jdk, sdk and j2se? Should i need to download all of jre, jdk, sdk and j2se?
thanks and regards,
david

JRE is the 'java runtime environment'. It is responsible for creating a Java Virtual Machine to execute Java class files (e.g., run Java programs)
JDK is the 'java development kit'. It is the same as the 'SDK' (at least in my mind). It normally comes bundled with a JRE and also allows you to compile Java source files into Java class files. The JDK allows you to both write and run programs.
J2SE is "Java 2 Standard Edition". It can refer to either a JDK or JRE. This is 'core' Java. There is also J2EE "Java 2 Enterprise Edition" which allows you to write middleware or server code more easily.
Your final choice will be which version. If you want the current, most common implementation:
J2SE 1.4.2, J2EE 1.3
If you want to skip ahead to the next generation, the latest releases would be:
J2SE 1.5 (also called J2SE 5.0) and J2EE 1.4
- Saish

Hi, would anyone tell me what is the difference between JRE and SDK?

So which one I should download and install on my computer so that I can do some programming?
Thanks for help

JRE is used to run the programs, SDK is the SofwareDevelopmentKit or something like that. So for programming you need the SDK (contains the JRE too). For running the programs you need the JRE.

JRE and SDK Issue

I installed IBMJava2SDK on my IBM Power PC which has Red Hat Linux on it. I installed it under /usr/downloads/IBMJava2-ppc64-141 directory.
Later when I check the version by typing and executing "java -version" it shows "Cannot find java"
So I added the directory in PATH and CLASSPATH but then it give following error:
bash:/usr/downloads/IBMJava2-ppc64-141/jre/bin/java: No such file or directory
can anyone help me out on this?

ls -l /usr/downloads/IBMJava2-ppc64-141/jre/bin/java
find / -name java 2>/dev/null

How is Java JRE or SDK actually installed in Ubuntu?

Ive used Java since the 1990s. Its been mostly on windows that has an exe installer; But always get to this difficult part when it comes to installation. Right now under Ubuntu i am installing java runtime again, have done it before but simply cannot figure out what it needs to install. Ive searched documentation and looked for anything that would indicate how Java is installed.
Its almost like an endless loop, reading the online info it says to download and install click here. you download and extract it and it ends up as a folder with lots of files. How to install it? download it again, extract it. again, extract it, maybe one of these times something will indicate how to install it
if anyone could point me towards the explanation or give me some hints, it would be so appreciated!

gimbal2 wrote:
913000 wrote:
I used to work on device drivers and kernel code for Fortran unix in the 80s, there was no java back then. There was better music than the trash out there these days, why, I can remember when Lawrence Welk used to come on The Nashville Network.....Big respect (I tend to listen to music from the 60's, 70's and 80's myself even if it was mostly before my time). But I stick to my comment, you should join a Ubuntu community and share in the knowledge of your peers :) Perhaps Sabre answered your question but you are likely to run into other "Ubuntuness" stuff.Thanks, it did answer the questions i had. It was sitting there in the folder which apparently is 99% of installation. I must be spoiled with windows running an installer, making sure its all compatible etc. And i did sign up for the ubuntu discussion, thats a great place to get questions answered also.
Yes in the 70s the new music was disco, the theme was dance, have fun, make love, etc; contrasted to the recent kind of music thats monotone talk against a synthesizer talking about violence, drugs and crime, and those "artists" are super rich. I liked MC Hammer when he came along, but he didnt use profanity so they kicked him out...
I think in the original question I had, there was the download site, agree with the terms, download and then? and then? how do you install it? nothing. you have to already know how to install it. Fortunately I was able to get fast answers from you (gimbal2 and from Sabre) who already knew, THANKS SO MUCH!

JRE - SDK

Just a simple question from me...I am nw to Java.
What is the different between JRE and SDK.
Thanks

JRE = Java Runtime Environment
SDK = Software Development Kit
First is for running Java applications.
Second is for creating Java applications.

QA Application with SDK or JRE

We currenty QA and certify our application using the J2SE SDK. A customer asked that we certify it with the JRE. Is that really necessary? Is there any difference in the runtime between the JRE and SDK that would require another regression of testing?

Theoretically yes: the JRE has classes that are compiled without debug options and the SDK (with the very same version) has a JRE that has classes compiled with debug options. But in practice, this doesn't make any difference. But as you can never be sure to save yourself from a falling meteor, keep testing with the JRE again ;-)

JRE-SDK what's the difference?

What's the difference between JRE and SDK?
Why SDK occupy much more space?

SDK (Software Development Kit) contains programs necessary to create Java programs such as the compiler. It also contains a runtime environment so that you can execute and test your programs.
JRE (Java Runtime Environment) contains only the programs necessary to execute Java Programs. This version is used to deploy your Java programs into the clients, who only need to run them and not compile any more programs.
Since JRE is a subset of the SDK, the SDK is natrually larger. The development tools are in the SDK.

1.4.2_03 SDK install problem (WinXP SP1)

I just installed j2sdk 1.4.2_03 (freshly downloaded), and installed on my WinXP SP1 laptop.
* The install croaked at the point at which it tried to install the standalone JRE (threw up an error dialog, and if you hit OK on that, it exits the install without installing the JRE).
* At that point, if I do "c:\j2sdk1.4.2_03\bin\java -version" (to check the version of the JRE contained in the SDK), it says "build 1.4.2-b28" (!!!). (I don't have any other JREs installed anywhere, and verified that it was indeed picking up the JRE from c:\j2sdk1.4.2_03\jre.)
Did the 1.4.2_03 SDK go out with a bad JRE bundled? The 1.4.2_02 SDK correctly identifies itself (java -version) as "build 1.4.2_02-b03", and I've uninstalled everything and rolled back to that version of both the JRE and SDK, and everything works fine now (installs flawlessly).

I am seeing the same problem with the j2sdk1.4.2_03 SDK and JRE installers. The error showing up on XP is "Error 1722. There is a problem with this Windows Installer package. A program run as part of the setup did not finish as expected. Contact your support personnel or package vendor." The install then exits with the package in a partial state and must be uninstalled. I also see the same problem when installing the older j2sdk1.4.2_03 SDK. Sounds like there is return state that is not being handled correctly in the package installer. Any ideas on how to fix this problem?
Thanks
Mark

Java ME SDK 3.0 not working on Windows 7 64-bit

Hi everybody,
the sdk has no 64-bit Version and the solution described at:
http://forums.sun.com/thread.jspa?threadID=5434297&tstart=45
did not work for me.
Even after changing the two configuration files bin\java and toolbar\bin\java to point to 32-bit installations of the jdk/jre, the sdk does not work and it cannot be uninstalled.
Error when starting the SDK:
A java.io.IOException exception has occurred.
Click Show Details or see the messages.log file located in your Z:\javame-sdk\toolbar\3.0\var\log folder.
(Details:)
java.net.ConnectException: Connection refused: connect
     at java.net.PlainSocketImpl.socketConnect(Native Method)
     at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
     at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
     at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
     at java.net.Socket.connect(Socket.java:529)
     at java.net.Socket.connect(Socket.java:478)
     at java.net.Socket.<init>(Socket.java:375)
     at java.net.Socket.<init>(Socket.java:189)
     at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:22)
     at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:128)
     at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:595)
Caused: java.rmi.ConnectException: Connection refused to host: localhost; nested exception is:
     java.net.ConnectException: Connection refused: connect
     at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:601)
     at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:198)
     at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:184)
     at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:322)
     at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
     at com.sun.jndi.rmi.registry.RegistryContext.lookup(RegistryContext.java:97)
Caused: javax.naming.ServiceUnavailableException [Root exception is java.rmi.ConnectException: Connection refused to host: localhost; nested exception is:
     java.net.ConnectException: Connection refused: connect]
     at com.sun.jndi.rmi.registry.RegistryContext.lookup(RegistryContext.java:101)
     at com.sun.jndi.toolkit.url.GenericURLContext.lookup(GenericURLContext.java:185)
     at javax.naming.InitialContext.lookup(InitialContext.java:392)
     at javax.management.remote.rmi.RMIConnector.findRMIServerJNDI(RMIConnector.java:1886)
     at javax.management.remote.rmi.RMIConnector.findRMIServer(RMIConnector.java:1856)
     at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:257)
Caused: java.io.IOException: Failed to retrieve RMIServer stub
     at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:338)
     at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:248)
     at com.sun.jme.toolkit.remoting.client.rmiimpl.ObjectServerConnectionImpl.connect(Unknown Source)
     at com.sun.jme.toolkit.remoting.client.rmiimpl.ObjectServerConnectionImpl.start(Unknown Source)
     at com.sun.jme.toolkit.remoting.client.rmiimpl.ObjectServerConnectionImpl.lookupMBean(Unknown Source)
     at com.sun.jme.toolkit.remoting.client.rmiimpl.ObjectServerConnectionImpl.findObject(Unknown Source)
     at org.netbeans.modules.javame.common.container.devicemanager.DevicemanagerHelper.openConnection(DevicemanagerHelper.java:53)
     at org.netbeans.modules.javame.common.container.devicemanager.DevicemanagerHelper.getDeviceManager(DevicemanagerHelper.java:86)
     at org.netbeans.modules.javame.platform.jme_sdk.autoinstaller.AutoInstaller.ensureDMStarted(AutoInstaller.java:292)
     at org.netbeans.modules.javame.platform.jme_sdk.autoinstaller.AutoInstaller.restored(AutoInstaller.java:63)
     at org.netbeans.core.startup.NbInstaller.loadCode(NbInstaller.java:421)
     at org.netbeans.core.startup.NbInstaller.load(NbInstaller.java:342)
     at org.netbeans.ModuleManager.enable(ModuleManager.java:906)
     at org.netbeans.core.startup.ModuleList.installNew(ModuleList.java:428)
     at org.netbeans.core.startup.ModuleList.trigger(ModuleList.java:364)
     at org.netbeans.core.startup.ModuleSystem.restore(ModuleSystem.java:276)
     at org.netbeans.core.startup.Main.getModuleSystem(Main.java:165)
     at org.netbeans.core.startup.Main.start(Main.java:312)
     at org.netbeans.core.startup.TopThreadGroup.run(TopThreadGroup.java:110)
[catch] at java.lang.Thread.run(Thread.java:619)
When I try to uninstall, an error log file is generated in the installation path of the SDK. Although it "sees" the 32-bit java installation, at its botton appears the following (interesting?) line:
vm_info: Java HotSpot(TM) 64-Bit Server VM (17.0-b17) for windows-amd64 JRE (1.6.0_21-b07), built on Jul 17 2010 01:05:36 by "java_re" with MS VC++ 8.0 (VS2005)
Can someone help?
Thanks a lot in advance.

Hey what's up Gatos.
Listen I have the same problem and I was wondering if you figured it out since October 2010 (your last post).
I also get the same IOException exception error. I also have windows 7 64bit, i installed 32 bit version of the SDK and uninstalled any previous versions. The Java ME SDK 3.0 Kit installed as well, and pointing to an appropriate sdk directory. I also tried changing the two configuration files (didn't have to change them because they were correct since I did not have any other version of sdk installed prior to installation of Java ME SDK 3.0.
So I am experiencing the same exact symptoms and I am wondering if you have resolved this issue yet or if you know of any other source of information that might help me. Your help would be greatly appreciated on this one. Thanks, and please respond even if it is a no if you can.
**EDIT:**
The Java ME SDK 3.0 magically started few times too, after displaying manyyyyyyy of these error windows, but it does not happen every time either. HELP
Edited by: 835054 on Feb 9, 2011 12:10 AM

JRE Vs SDK

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