The JDK and Redhat 8

I am a newbie to Linux in general but I assumed that when you install an RPM it automatically installs everything you need. I installed the JDK RPM and I still have no JRE installed on my machine. Do I need to enable the package somewhere? Are there any instructions for installing in Linux?

This is a follow up to my previous Reply to explain my question.
I read the installation instructions provided by Sun Microsystem at:
http://java.sun.com/j2se/1.4.1/manual_install_linux.html
However, it does not say how to install for Mozilla, much less Mozilla
Mozilla 1.0.1 (Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.1)
It does not even say how to install for Linux Netscape 7.0, which is the equivalent, or near equivalent to Mozilla 1.0.1.
Instead, it tells how to install for Netscape 6.0, or Netscape 4.*
I can follow the instructions for Netscape 6.0, which is the nearest version to Mozilla 1.0.1, but I'm not sure whether to create a symbolic link" from the ns610 directory, or the ns600 directory. I'm afraid that I might not be able to undo the link, or at least I don't know how I would undo it now, if it didn't work properly.
(My Mosilla is located at /usr/lib/mozilla-1.0.1. I have a plugin directory under it. However, do I make a symbolic link to (a) /usr/java/j2re1.4.1_01/plugin/i386/ns4/file:/usr/java/j2re1.4.1_01/plugin/i386/ns4/javaplugin.so, or (b) /usr/java/j2re1.4.1_01/plugin/i386/ns600/file:/usr/java/j2re1.4.1_01/plugin/i386/ns600/libjavaplugin_oji.so, or (c) /usr/java/j2re1.4.1_01/plugin/i386/ns610/file:/usr/java/j2re1.4.1_01/plugin/i386/ns610/libjavaplugin_oji.so?

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What the jdk and sdk contain?

what are the contents of jdk and sdk.

Simple google search and I find this:
[http://usenet.jyxo.cz/cz.comp.lang.java/0303/jdk-vs-sdk-vs-j2se-vs-j2ee-vs-j2me.html]
Should be what you're looking for.
Edited by: shano on 6/09/2008 14:04

Why Does Installing The JDK On A 64bit OS Install 3 Copys of the JRE???

I am running Windows 7 Home Premium 64bit version. I recently installed the JDK and realized that along with it 3 copys of the JRE were installed. This is a brand new computer I am running that I just brought home a few days ago so I know there not older versions. Basically what I have is the following; I downloaded the 64bit JDK package and installed it on my system. Now I have the following set up and would like to know if I can safely uninstall any of these as I dont think I need all of them.
Under Program File(x86) I have the jre6 installed there, that is the 32bit version.
Under Program Files I have the jre6 installed there, as well as the jdk1.6.0_20 these are the 64bit versions. The troubling thing is that inside the jdk1.6.0_20 folder I have yet another jre installation.
Now I assume that I need both 32 and 64 bit versions on my system for whatever reason is the case. What I do not understand is why if the jre6 is already installed in both the 32 and 64 bit locations as indicated above, than why does it also get installed inside the jdk1.6.0_20 folder location?? I know that the jre comes bundled with the jdk but is that the jre that is located inside the jdk directory or is it the jre folder????
Could someone please explain to me exactly how this works and what version i can uninstall??? I am assuming that I can remove the seperate jre6 install that is located in the 64 bit program files location as then that would leave me with the 32bit jre still installed and I would also still have the jre that is installed inside the jdk folder...
Am I correct on this one??? Also another quick question.... If you need both 32 and 64bit jre's than why don't you need both 32 and 64bit jdks??? Also is it possible to just go ahead and run only the 32bit version on a 64bit machine???
Thanks in advance for any help

They bother me because I prefer to keep my system tidy as possible. I do not like to have extra things installed that just waste hard drive space. I am the type of person that keeps my system as clean as my house. I don't like having things laying around that are never going to be used and just waste space. Now in this case apparantly one of these copies of java is not going to be used ever. It makes no sense to me that if the jdk comes with the jre bundled, then why would it also install a seperate jre in another folder when there is already a jre contained within the jdk folder?????
I understand the purpose of the 32 bit install of the jre, but why would you have the following set up???
Program Files
jdk1.6.0_20>>jre
jre6Program Files(x86)
jre6Thats 3 copies of the jre and only 1 of the jdk?!?!?! I need one jre for 32bit and one for 64bit, but why the extra copy in the 64bit location???
You mention uninstalling and reinstalling, but as I said earlier this pc is only a week old and all i did was download the 64bit jdk from the Java website and install it. So all that will accomplish is the same result. My question was trying to figure out if it is safe to remove the extra copy of the jre without losing any functions????? Or would it be better to just remove it all and install the 32bit version???? I read that the 64 bit is for Internet Explorer 64bit which i never use, I use google chrome and firefox which are both 32bit. The thing is though is that the jdk is what I need for programming. Does it matter whether its 64 or 32 bit????
Edited by: wakeup6620 on Jun 15, 2010 9:48 AM

Login time changes based on the rpd and webcat

Hi,
I have setup a new environment where I have installed Weblogic as the application server and on top of it, I have installed the OBIEE. I have done the necessary configuration changes also.
To test my changes, I have pointed my nqsconfig.ini file to default 'samplesales' rpd and same in instanceconfig. Now when the Administrator logs in, he can login and see the dashboard screen without much delay.
Now when I changed both nqsconfig.ini and instanceconfig to point to my organization rpd and webcat, it takes about 5 mins for the Administrator to login and see the dashboard screen. Same is the case for any other user also.
The user can finally see the dashboard screen but it is taking long time.
Could anyone please let me know what might be the reason?
Thanks,
Hari

Hi Srinivas,
It comes down to some tinkering in the java.util.* package.
First off, you'll need to familiarise yourself with the Calendar class. This basically replaces the old Date class from old versions of the JDK, and allows you to hold certain dates and times. You can get one by calling Calendar.getInstance();
You can then set a TimeZone on this Calendar by calling myCalendar.setTimeZone().
To create a basic TimeZone, have a look at the SimpleTimeZone class - it'll allow you to set the hours ahead or behind GMT, as well as a start date for this time zone, and even gives the ability to add daylight savings time.
From there, the time zone you add to the Calendar should produce the correct dates for you. Changing the time zone within a Calendar that already holds a date and time should alter that date and time accordingly.
If you want to get really clever, have a look at the Locale class - it allows you to specify a default language and country. You can then apply this to your Calendar by calling Calendar.getInstance(Locale myLocale) instead of the version above. If you have the international JDK (i.e. the one with i18n.jar onboard), Calendar should be clever enough to format the dates nicely for you if you use a fairly well-known Locale (such as American English and so on).
A Locale will also let you format dates in a location-specific way if you want to output them to the screen later on down the track. A quick look at SimpleDateFormat and some of the other DateFormat classes should tell you what you need to know.
If you can't quite get your head around any of the above, feel free to reply again!
Martin Hughes

JDK and JRE comptability for Windows server 2008

Hi,
Could someone please let me know what are the JDK and JRE versions that are comptabile with Windows server 2008 ?
Thanks.

Hi,
For security purposes, the IP address for the Windows Update web site constantly changes and it is not a fixed address. Also, there is no official publication of the
IP addresses. We normally advise against defining IP addresses on the firewall for this purpose. Instead, we suggest either allowing all outbound connections to http & https ports or defining the DNS addresses as permitted destinations for traffic via
the firewall.
For up-to-date information about the IP's being used by Windows Update, use the DNS system, as this is the only reliable up to date source of information. If you use
DNS, make sure the following destination hosts are specified:
http://windowsupdate.microsoft.com
http://*.windowsupdate.microsoft.com
https://*.windowsupdate.microsoft.com
http://*.update.microsoft.com
https://*.update.microsoft.com
http://*.windowsupdate.com
http://download.windowsupdate.com
http://download.microsoft.com
http://*.download.windowsupdate.com
http://wustat.windows.com
http://ntservicepack.microsoft.com
http://stats.microsoft.com
https://stats.microsoft.com
Thanks for your understanding.
Best Regards,
Nina
This posting is provided "AS IS" with no warranties, and confers no rights.

Installing JDK and JRE, how?

I am new to Java. So new in fact that after 6 months I still have not managed to accomplish any of the basics concerning JAVA and I am in desperate need to get it to function. Perhaps you can help? On my XP I have downloaded the JDK and successfully set a path, but not a single program ran after it has gone through the compiler? Huh? I just don't get it! So, I have moved on a little bit and I am working off my Vista. I have learnt that the JRE and JDK are not the one and the same. I need BOTH if I want to start programming. I have the JRE 6 installed and working fine but I cannot even download the JDK! What is going on, does everybody encounter these problems or just me? Once, if ever, it is down loaded how do I set the path on Vista? Furthermore, would I need anything more other than the JRE and JDK? I really need help here. Why is JAVA being so problematic and why isn't there a nice and easy starting point? All I want to do is program.

Yep, 6 months is a heck of a long time, but it has not been continuous! I have a second degree in maths to complete. Free time is rare and I have had so much bad advice from people who thought they knew what they were doing. I hope here to make up lost time and get the right advice which I need!

Jre, jdk and j2se in Oracle e-business

Can someone please shed some light on this.
I believe jdk = j2se - which is basically the java dev kit. And jre presumably is java runtime environment.
My question - Should the versions of the 3 be the same?
Most time I see need to upgrade jdk to jdk 1.5 or 1.6 but I have always seen jre 1.1.8. How will this affect the system operations.
Thanks

Hi,
JDK is mainly used for middle tier to run the java process
JRE is a plugin which is used by fron-end user to connect the java pages
for more details about the JDK and JRE pls chk the following java link:
http://www.java.com/en/download/faq/jre_jdk.xml
-Rk

Difference between JDK and J2SDK ?

Hi
I am a novoice in Java. Please tell me the diff between JDK AND J2SDK ?

Hi
I am a novoice in Java. Please tell me the diff
between JDK AND J2SDK ?They are about the same. Sun likes to change the name
from time to time. The SDK might contain Netbeans as
well.
KajActually, they are exactly the same. You can download a bundle that contains the JDK and Netbeans, but I wouldn't consider Netbeans to be part of the JDK.
Sun has been pretty bad about naming things for years. While they are not exactly the same thing, SunOS 5.8, Solaris 2.8, and Solaris 8 all basically mean the same thing.
The J2SDK/JDK distinction is just one of those lingo things that you pick up on at some point.

Difference between JDK and SDK

Hi,
I would like to know the difference between the JDK and Java 2 SDK.
Please clarify. Thanks in advance!

New thread created for this question:
Database Connectivity

Updating java when using JDK and JRE

Ok, so after you make a program in java and compile it, you then install the new update of java. Wouldn't the virtual machine(JRE) or java development kit(JDK) notice something thats different and bring up an error?
Do you have to use the same JDK as JRE that you have, because if you didn't have the most updated one, wouldn't there come up with an error?
Last question, if you have used the command line to compile a program, then you know that you need to use javac to compile and java to run it. Well when you use the command javac to compile, then you are using the JDK; and if you use the java command to run it, then you are using JRE. This is just a question to make sure that I have this correct, So correct me if I'm wrong.

brown16b wrote:
Ok, so after you make a program in java and compile it, you then install the new update of java. Wouldn't the virtual machine(JRE) or java development kit(JDK) notice something thats different and bring up an error? Why? A newer Java version should be able to execute programs compiler for a prior version.
Do you have to use the same JDK as JRE that you have, because if you didn't have the most updated one, wouldn't there come up with an error?Eh, what?
Last question, if you have used the command line to compile a program, then you know that you need to use javac to compile and java to run it. Well when you use the command javac to compile, then you are using the JDK; and if you use the java command to run it, then you are using JRE. This is just a question to make sure that I have this correct, So correct me if I'm wrong.It's correct.

What are the versions required for JBOSS,JDK and ORACLE to setup the ATG 10.2.

Hi Folks,
Could you please share, What are the versions required for JBOSS, JDK and ORACLE to setup the ATG 10.2.
Thank you.

In case you don't have access to MOS :
JBOSS : 5.1.2 EAP
JDK : 1.6.0_38
ORACLE :
Oracle Exadata5
Oracle 10gR2 (10.2.0.3)
Oracle 10gR2 RAC (10.2.0.3)
Oracle 11gR2 (11.2.0.2.0)
Oracle 11gR2 RAC (11.2.0.2.0)

What are the differences between jdk and sdk

what are the differences between jdk and sdk?? thanks

Just marketing whims.
SDK = software development kit
JDK = Java development kti
Sun has use both names to refer to its SDK for Java. I forget which one they're using now, but they've switched a couple of times.

[svn:fx-trunk] 11488: Resubmitting binary distribution of xercesPatch. jar from the third party module in the SDK and compiled it with Sun JDK 1.4 .2_12.

Revision: 11488
Author:   [email protected]
Date:     2009-11-05 17:10:10 -0800 (Thu, 05 Nov 2009)
Log Message:
Resubmitting binary distribution of xercesPatch.jar from the third party module in the SDK and compiled it with Sun JDK 1.4.2_12.
QE notes: N/A
Doc notes: N/A
Bugs:
SDK-16818 - Must open-source the code for xercesPatch.jar.
Reviewer: Discussed with Gordon
Tests run: Checkintests
Is noteworthy for integration: No
Ticket Links:
    http://bugs.adobe.com/jira/browse/SDK-16818
Modified Paths:
    flex/sdk/trunk/lib/xercesPatch.jar
    flex/sdk/trunk/modules/thirdparty/xerces-patch/build.xml

Did you try this:
http://forum.java.sun.com/thread.jsp?thread=434718&forum=60&message=1964421

Two versions of jdk and RTE on the same computer

When Installing j2sdk1.4.1_01 I had not uninstalled jdk1.1.8 believeing that the new version would overwrite the old one.
But instead it installed alongside the old one.
I now have both showing up in the Cintrol Panel/Programms and I have two relevant folders on w2k drive.
Might the collide?
I was about to remove jdk1.1.8, but noticed that it takes 28.1 Mb whereas j2sdk1.4.1_01 is only 1.88 mb - perhaps j2sdk1.4.1_01 uses some files from the old one, and removing the old, I disable the new one?
The same about Java 2 RTE: I have both v.1.2.2 (19MB) and 1.4.1_01 (1.6 Mb)
What would you recommend?

Thanks, sounds like a good idea.
I uninstalled all the versions of JDK and of RE and re-booted the PC as prompted.
Question: folders j2sdk1.4.1_01 and jdk1.1.8 are still there - should I remove them manually?
Before reinstalling JDK and RE, I run an ASP page with a java-applet, sitting on my PC. As expected, the applet was shown as an empty rectangular.
However, when I accessed a similar page on the Internet, the applet there was working fine.
I was dead sure that the applet is executed on the client computer and that computer heeds RunTimeEnvironment which I uninstalled.
In any case all the applets should either work or not work, nomater whether they are sitting on my local drive or downloaded with a page from the Internet.
I feel I am missing something. Could you provide further comments?
a
PS. I have multiple partitions on that disk with two other OS - can this be a cause?
When RE is installed, which folder and where to is added?

What is the difference between JDK and J2ee

Could someone explain, in simple terms, what is the difference between JDK and J2ee. I am trying to understand the difference.
THanks

Could someone explain, in simple terms, what is the
difference between JDK and J2ee. I am trying to
understand the difference.You can practice on this one first. What's the difference between chalk and cheese? No just kidding.
A JDK is a set of tools for Java development including compiler, runtime system and standard libraries. J2EE is the enterprise version of the Java technology platform (it's one of three). To use it you download the proper JDK's.

The JDK and Redhat 8

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