Classpath in Windows NT 4.0

My employer has recently had IBM VisualAge for Java installed on my Windows NT box. Prior to this installation, Java 1.3.1_01 worked perfectly.
The classes which used to work are now generating NoClassDefFoundError messages.
If I run from the command line with the -classpath option set, they work again.
I suspect that my classpath environment variable has been overwritten, but don't know where it is set. Can anybody help me find this pesky setting?

In Windows NT, U can find the CLASSPATH settings @ Start -> Control Panel -> Systems -> Environment -> System Variables
Hope this helps U
Sam

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Trouble Setting Classpath on Windows XP

I'm having trouble setting up a classpath on Windows XP for SDK1.3.1_04.
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c:\jdk1.3.1_04\bin;
There wasn't a Classpath variable present though. I've tried adding it myself in System Variables as follows:
Variable name: Classpath
Variable value: set classpath=.;
But no joy. When I run "set" from the command prompt, there's no classpath present.
I'd appreciate any help.
Cheers.

Hi,
I am running on XP (unfortunately), but also win2000 and win98.
Setting up the classpath is not a problem, although if you are logged in as root, then it does not always show correctly.
Try logging back in as yourself and then checking the classpah through the set command.
Altrnatively, if this is not the problem, actualy try a reboot. which should not be necessary.
best
kev

Classpath in Windows ME

I cannot seem to find where to set the classpath in Windows ME. Shouldn't the J2SDK installer set something up in the autoexec.bat if that is where you are supposed to do it. Is it necessary after my first installation of the JDK to manually set a classpath for the standard libraries? Thanks for any help on this.

The java compiler knows were to find the standard core libraries you use the class path to define where you have stored your own extensions that you may want to include (import).

..CLASSPATH in Windows XP Home Edition..

Please can anyone tell me how to set CLASSPATH in Windows XP Home Edition OS.
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hello?
i really need some help
my computer is really mucked up and i need to reboot it
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Setting classpath in windows ME

how to set it?
I have placed a file "test.java" in the directory c:\test
i set the classpath in Dos prompt by:
set classpath=c:\test;
however, the following message appear:
C:\>javac test.java
error: cannot read: test.java
1 error
can anyone help me? is it the way to set classpath in Windows ME is different from other versions of Windows? That's urgent, Thanks!!

setta le impostazioni in questo modo:
Avvio --> Programmi --> Accessori --> Utilit� di Sistema --> Microsoft System Infomation.
Selezionare la voce "Utilit�" di configurazione di sistema dal menu "Strumenti". Selezionare quindi "Ambiente", variabile PATH e premere il pulsante "Modifica";
Da questa sezione puoi fare il SET DEL PATH E CLASSPATH.
RESTART PC, E PROVA SE TUTTO FUNZIONA.
PS. se non riesci a capire l'italiano, posso seguirti in lingua inglese. , fammi sapere anche via mail.

How do you change the CLASSPATH in windows XP

How do you add a *.jar file to you CLASSPATH on Windows XP?
I can see the PATH variable but there is no CLASSPATH variable

Your CLASSPATH should be under -users variables-, if it's not there, just create it. Click on New, then next to Variable name, type in CLASSPATH, and next to variable value, type in your .jar file....
That should be enough...hopefully!!
Good luck!
Sylvie

Setting classpath in Windows XP

I have read numerous questions and replies pertaining to setting the classpath in Windows XP but have yet to find a clearcut answer. I have JDK 1.4 with the correct PATH set. Generally speaking, what do I type when setting up the CLASSPATH for windows XP? In addittion, what about jar files, libraries, and packages? Thanks

CLASSPATH contents depend totally on what you establish as your Java environment.
A classpath value tells Java to look "here" for the files that you create. (It knows where it's "own" files and jars are, we don't any longer have to tell it where to find them.)
If no classpath variable is set. Java uses a default CLASSPATH of the current directory. Many people can run this way.
If you set a classpath it cancels the default setting. Therefore, it's necessary to start it with a period, which represents the current directory. Use a semicolon to separate this and subsequent entries.
Follow that with directory paths that point to directories that you want Java to search to find files and jars that you create or that applications need to use.
If Java needs a file or jar and it can't find it in one of the classpath entries, it will complain with a "classpath not found" error.
Here's my SET CLASSPATH statement:
SET CLASSPATH=.;C:\NetRexx\lib\NetRexxC.jar;C:\j2sdk1.4.0_01lib\tools.jar;C:\mnrx;C:\NetRexx\NrxRedBk

How to set the classpath in windows operating system

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Open autoexec.bat in texteditor. This is an example from my autoexec, win me. Running resin
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Setting Classpath on Windows 2000 box

I have written a java application that is deployed to a Windows 2000 box. This application requires that a number of .jar files be included in the classpath, but it appears Windows 2000 imposes a maximum character length on the classpath variable because when I try to include all my .jar files in the classpath variable, the string is getting cut-off after a set number of characters. For example, I would like my classpath set to c:\classes\jar1.jar;c:\classes\jar2.jar;c:\classes\jar3.jar, but Windows 2000 only recognizes c:\classes\jar1.jar;c:\classes\jar2.jar;c:\cl. This causes my application to take java.lang.NoClassDefFoundExceptions since all the .jar files do not get included in the classpath.
Does anybody know of a way around this issue? I would really like to avoid extracting the contents of my .jar files to a directory structure. Thanks for your help.

I forget what the limits in Windows are, but they're a lot bigger than the size you need. I just set my classpath to that string in Windows 2000 with no problem. I believe Windows has a limit on the total size of the environment: maybe you have a whole lot of other environment variables set that you could dump. More likely, the problem has nothing to do with a Windows size limit, and you're getting cut off somewhere else.

Setting Classpath on windows platform

Hello
I was trying to set classpath of "D:\documentum\config" in my environment variable , i was doing it through command
prompt , the command i was implementing was
set classpath=D:\documentum\config;
but the when i was closing command prompt , the environment variable in windows named as ClassPath was not updating
i have also tried this command
set classpath=%classpath%;D:\documentum\config;
this also having the same result , so how can i set this property through command prompt
Regards

You can permanently set command line environmental variables through the advanced settings in Windows. You have to hunt around for it a bit, it is somewhere behind opening the right click properties of "my computer" (or whatever it is called in your flavor of Windows) and then choosing advanced. An "environmental variables" tab should be present there.
BUT! I would not advise you to set a classpath variable unless you fully realize that is only to make your development life a bit easier when working on the command prompt. When making your application ready for deployment the classpath must be managed without the variable. A script could work, or packaging everything up as an executable jar. When you start to work with an IDE like Eclipse or Netbeans you don't need that variable at all any more.

JDBC drivers for postgres+classpath for windows

I've written an application for university last year, that connects to a postgres database. It worked perfectly on the Debian, but I'm trying to run it on Windows 2000 now.
I've downloaded the driver http://jdbc.postgresql.org/download/postgresql-8.0-311.jdbc3.jar but now what do I need to write in the "Class.forName(String name)" line , as I've put the jar in c:\ ?
Other question while I'm typing : my other java applications run correctly althought no classpath variable exists in the system. How can I set it easily and how can I add the postgres drivers to it ? ( I know how to under Linux, not windows )

You write Class.forName() using the name of the PostgreSQL driver class, just like you always do.
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You shouldn't have a CLASSPATH variable in the system. One size does not fit all. You should know how to set it every time you compile and run using the -classpath option for javac.exe and java.exe. Read the javadocs for these tools.
%

Set classpath in Window 95, 98, ME

Hi,
Would anybody please show me how to set the class path in windows 95, 98, ME.
I used: set classpath=c:\ but it did not work
Thanks

hi,
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If JDK is installed in C: then the path would be
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Any easy way to set *.jars classpath in windows

Is any easy way to set the classpath for serveral jars in windows?
for example, if I have 1000 jars in a folder "C:/MyJar", is this the only way to set the classpath with:
CLASSPATH=C:/MyJar/Jar0001.jar; C:/MyJar/Jar0002.jar; C:/MyJar/Jar0003.jar; .........; C:/MyJar/Jar1000.jar
?

Is any easy way to set the classpath for serveral jars
in windows?
for example, if I have 1000 jars in a folder
"C:/MyJar", is this the only way to set the classpath
with:
CLASSPATH=C:/MyJar/Jar0001.jar; C:/MyJar/Jar0002.jar;
C:/MyJar/Jar0003.jar; .........; C:/MyJar/Jar1000.jar
?You shouldn't have a system CLASSPATH environment variable.
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Doing it with a system environment variable makes your apps less portable, because now you depend on the target machine being set up in a particular way. You should figure out how to package your apps appropriately so clients don't have to worry about that setup issue.

Classpath under Windows 2000 and XP Beta

I recently installed windows XP Beta and Downloaded jdk1.3.1_01. When you write the example of "Hello World!" it compiles it, but it does not run it. Back when i used win 9x I use to set the classpath with this line
SET CLASSPATH=.;<NAME OF DIRECTORY WHERE I WORK WITH JAVA>
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Exception in thread "main" java.lang.NoSuchMethodError:main
All my java files that i was working fine under windows Me and 98 where in a folder name Proyecto
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my JAVA_HOME c:\jdk1.3.1_01
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8.3 filenames on classpath under Windows XP

Hi,
I have an application where the classpath may include paths with unicode characters. Since there is no obvious way to pass such paths to the JVM at startup, I have tried to convert the paths to the short (8.3) format prior to passing them to the JVM (as this format seems to be free of unicode characters). However, any paths supplied to the JVM in this way seem to be ignored e.g. having AClass inside jar C:\classp~1\My.jar means the jar won't be found. I'm running under WinXP.
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File pathEntry = new File(pathString);
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Personally I think this is a bug - can anyone else offer me an opinion on this??

Classpath in Windows NT 4.0

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