SDK and JRE?

what is difference ebwteen Java SDK and JRE? do we need to install both?

The answer to the first part is 'Software Development Kit' and 'Java Run-time Environment.'
The answer to the second part is, of course, 'it depends.' To make use of other folks' Java apps and wonderful things like Java WebStart you need to have the JRE installed. To do some developing of your own little goodies, er... beans, er... applets, you'll need to install both.
Regards,
Geoff.

Similar Messages

What is SDK and JRE

What are these two things. I have installed java and it works but I don't know what I have installed. I am confused about wht SDK and JRE are.
Thanks,

Hi
Well...SDK stands for Software Development Kit
and JRE stands for Java Runtime Environment.......
so the JRE is part of the SDK......
SDK contains for instance the java API, the compilers and the applet viewer
JRE contains the virtual machine needed to run java code
Enough info yet???? otherwise...look around at the SUN : )

SDK and JRE keep Currupting

I've been trying to download the JRE and the SDK but whenever I double click the set up files I get an error message saying the file has been currupted and I have to redownload it. I've tried redownloading a number of times and I get the same problem everytime.
I've tried:
-Redownloading
-Redownloading off a different site
-Turning off firewall
-Not using Get Right to download the files
Any1 know how to solve this? By the way Im on 56k so I dont really want to download the SDK again, I've already redownloaded a number of times.

I've been trying to install the 1.41 Windows SDK (using Win 2k right now), and I've been getting the same error. I also received the error in XP last night when that's what I had on my system. :) Not sure what's going on. I have instaleld another version before, last summer, with total success.

Is SDK, and JRE supported on XP ?

Just wondering here about this cause I'm having a bit of trouble running the applet even when it compiles with no errors.
Thanks,
Michael

I am using J2SDK 1.4.1 on my Compaq XP Home system with no problems. However, there is some problem with some video drivers that XP systems use. Search the forums for more details.

Java SDk and Java JRE?

Do I need both the Java 2 SDK and Java 2 JRE(both standard edition) in order to make Java applications? If I do, how do I get them to work together? Which do I install first? Where should I install the SDK in order for it to work with the JRE(and vice-versa)?
Thanks all!

You need the SDK. When you install the SDK, you get the tools to develop in the language as well as the JRE to run your code. The JRE download only comes with what you need to run Java. The SDK includes the JRE.
Michael Bishop

Why SDK and not just JRE

Hi,
I am amazed that for just running a Java application one needs the Java SDK and not the runtime environment only.
Has Oracle got shares with hard disk manufacturers ?
Regards

The reason to require a JDK or our bundled jre+tools.jar is for the plsql debugger. The debugger use the jdi apis which are not included in the stock jre. If you never intend on using the plsql debugger you can use a jre and everything else will run just fine.
-kris

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

SDK, JDK, JRE,

Hi everyone,
I'm very very new to Java etc. I want to learn JSP/Servlets.
Now I see I need to install software, I see things as SDK, JDK, JRE what is this all? What do I need?
I tried to find the info but there is so much information I'm not sure what I'm looking at. So I thought if there is any expert here that can clearly explain what the difference is between SDK, JDK, JRE.
Thank you very much!!
Regards,
Steven.

JDK:     When you download Java, you will get a couple of tools: the compiler, a tool to generate documentation, a tool to change security settings and a tool to run compiled Java programs (class files). All of these tools bundled together is called the Java Development Kit (JDK). If you want to create your own Java program, this is what you need. Later we will show you where you can get the JDK, and how you should use it.
SDK:      Since the introduction of JDK version 1.2, a different name is used for the Java Development Kit: Java 2 Software Development Kit (SDK).
JRE:      The Java Runtime Environment (JRE) is part of the JDK. It contains only those tools that are needed to run java programs. It does not contain the compiler. Therefore it is a lot smaller than the JDK. If you develop a Java program for someone else, you are allowed to give him the program and the JRE so he can run your program. Officially you are not allowed to distribute the JDK, but anyone can download it freely from internet. The JRE for Windows also contains the Java plugin.
from: http://www.win.tue.nl/~marko/java/
To get Java set up, follow the tutorial "First Cup of Java":
http://java.sun.com/docs/books/tutorial/getStarted/cupojava/

Is SDK included JRE?

Hello
I download SDK(j2sdk-1_4_0-win.exe) and JRE(j2re-1_4_0-win-i.exe), find in SDK are included a JRE, so I can remove "j2re-1_4_0-win-i.exe"?
. li

WHY?
JRE JUST FOR JAVA USER.

SAP R/3 4.7 and JRE 1.5

Hi ,
On our SAP r/3 4.7 server currently JRE1.4 is installed .
We recived a request to upgrade it to 1.5
Can you let us know if there is any dependecy between sap r/3 4.7 and JRE 1.5
Will it run without any issue.
Regards
Madhav

Hi Sunny ,
Thanks for the info .Just one more question does SAP Java connector 3.06 is supported by R/34.7?
I am unable to find any information regarding the same anywhere .
Only thing i found was that
SAP java connector Supports R/3 3.1I and higher (and other SAP Components that have BAPIs or RFMs).
It does not say anything about the version of SAP java connector.
Regards
Madhav

Flex SDK and AIR runtime version in mobile

Hi, guys.
I'm trying to make my first Flex mobile app.
I'm a little confused about the relationship between Flex SDK and AIR runtime versions for mobile development.
In the "Developing Mobile Applications with ADOBE FLEX 4.6 and ADOBE FLASH BUILDER 4.6" pdf document, it says:
"AIR requirements
Flex mobile projects and ActionScript mobile projects require AIR 2.6 or a higher version. You can run mobile projects on physical devices that support AIR 2.6 or a higher version of AIR.
You can install AIR 2.6 or a higher version only on supported Android devices that run Android 2.2 or a higher version. For the complete list of supported Android devices, see Certified Devices. Also, review the minimum system requirements to run Adobe AIR on Android devices at Mobile System Requirements.
Note: If you do not have a device that supports AIR 2.6 or a higher version of AIR, you can use Flash Builder to launch and debug mobile applications on the desktop."
So, I go and check the Certified devices in http://www.adobe.com/devnet-apps/flashruntimes/certified-devices.html and find that the minimun FLASH PLAYER version accepted by ALL devices is FP 10.1
1. Does this mean that if I want to release an app to target ALL mobile devices, then I can only use Flex 4.5?
2. Do support for Flash Player mean the same than support for Adobe AIR? Or the application will prompt the user to install whatever version of the AIR runtime and all of them would be supported by the device, even in the FLASH PLAYER support is for a lesser version?
Thanks!

Thanks for your help, Flex harUI,
The first impression that comes to mind is that FP version is indeed only for the web browser plugin. Then, why does the official Flex 4.6 mobile development documentation have a link to that page that only speaks about the supported FP version in mobiles under the title "AIR requirements"??
This makes it way too confusing.
Do you know whether there is something like an equivalent matrix/list of mobile devices with their supported AIR runtime versions? I went a great deal in trying to keep my original app under 400kb... I didn't know that in the end it would end up weighing 9.5Mb... :S
Thanks again,

What's the difference between Java SDK and the Enterprise Edition?

What's the difference between Java SDK and the Enterprise Edition? Are they both free?

both r free but they are used in diffrent applications. sdk are used for simple apps that run on your computer while j2e (enterprise edition) are ment for large distributed computer systems that include servers and such. if you don't know the diffrence you probably wont need the the j2e, only the sdk.

Problems with stacked bar chart in Java SDK and CRDesigner

Hi @ll,
I have an issue with the rendering of stacked bar charts through the Java SDK and the CRDesigner. unfortunately, my research in this forum and with the help of aunt google didn't lead to success.
These are my problems:
I have a stacked bar chart which, when datasets/stacks increase in number per bar, displays errors:
1.) the single stacks of the bar merge together randomly and form bigger stacks with the sum of the singles. the information of single stacks gets lost in the bar.
2.) the total sum of all singles is bigger than the maximum value on the y-axis displays. thus, the scaling is wrong.
1.) appears in the CRDesigner as well as in the Java SDK
2.) only occurs in the Java SDK
Is there any trick to turn the random merging of slices off?
Is the false scaling a known issue and is there a bugfix/workaround?
many thanks for all advice
Tom

hi folks,
i found the answer to the above problems:
when you specify the recordfields that are responsible for the change to the next stack or bar, the 'stack' fields have to be unique.
in my case i evaluated durations in msec (as stacks) from different devices (as bars). randomly i had the same durations for one device. what happens is, that CR does not notice a change and accumulates to the first stack with the same duration.
surprisingly this also seems to derange the axis scaling. fix the problem by simply using an overall unique recordfield like rownum or a formula that forms the current timestamp to text as identifier for the stacking.
cheers
.t

If I already have the android SDK and AVD installed from prior installation for eclipse do I have to

If I already have the android SDK and AVD installed from prior installation for eclipse do I have to do it again for dreamweaver if I want to develop for android ?
Also, if I'm developing for android, ipad, and iphone and I want them all to be the same can I do it by only making one site or I have to make a different site location for each?

Inquire of whom? Apple? Seems to me your carrier is giving you the run-around. They are the ones who provide the service, so they should be able to tell you the plan specifics. Get on the phone again with them and insist on an answer.

Errors installing and uninstalling JDK and JRE 5.0 update 6

I recently removed some older versions of java as they take up alot of space.. now wondering if i should have.
I uninstalled all version fine, leaving only the update 6 for both JDK and JRE. Now when i try to compile in Jcreator i get the error message:
'Error : Invalid path, "C:\ProgramFiles\Java\jdk1.5.0_05\bin\javac.exe" -source 1.5 -classpath "C:\Program Files\Xinox
Software\JCreatorV3LE\MyProjects\Chapter07_Listing03" -d C:\Program"
Files\Xinox "Software\JCreatorV3LE\MyProjects\Chapter07_Listing03
@src_chapter07_listing03.txt"'
I have no javac file in the directory.I did before i unstalled the older updates
I am getting a windows installer error when trying to install JDK 5.0 update 6, windows installer works when trying to uninstall though. When i try to remove JDK 5.0 update 5, it tells me i all ready have this version installed, and to uninstall through my add/remove utility which is what i am doing! Then if i click ok i get: 'Fatal error during installation' This also occurs when trying to remove update 6. I also get problems with my JRE 5.0 update 6. When trying to uninstall i get the message 'error applying transforms, verify paths are valid' I cannot get rid of these!. It seems to be interfering/linked with installing them aswell.
PLEASE HELP ME-i just want to compile
Thank you

This forum is for Sun Java Studio Creator product only... We'll be happy to assist you anytime if you have trouble installing or using this product. :-)

SDK and JRE?

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