Novice Trying to Set The CLASSPATH Variable

I am trying to compile a file (which can be downloaded at http://java.sun.com/docs/books/tutorial/getStarted/QandE/FirstClass.java). Despite being able to successfully compile several other files, this particular one will not compile. According to my JAVA Tutorial book, the problem may lie in the CLASSPATH variable, but I am having a great deal of trouble trying to set/understand it. My operating system is WINDOWS 2000. PLEASE HELP!!!

in win 2000, the classpath can be set by the following process.
Right Click My Computer icon and click on properties.
(This can be done by going to the Control Panel and Double Clicking the System icon too).
Once you have the properties window of the system click on the 'Advanced' tab.
There is a button called 'Environment variables'.Click on it.
You will have a part called 'System Variables' there.
Here there is an entry called Classpath. Just add the entry of what you want to add to the classpath, separating each entry with a ';' semicolon as mentioned there and click on the Set button.
That should set the classpath.If that does not take effect immediately, restart the system and it will take effect.
Tell me if it worx.
All the best. Bye!
Cheers,
Win!

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I tried to set the classpath, here is what I did, any help would be appreci

javac -classpath/WINDOWS/Desktop/school/Java Projects/assignment2sem2/exercise9.10

howdy.
ok. this is a constant problem with newbies. i'm not picking on you but if you don't know how to figure out class paths then you have a fundamental lack of understanding of java. understanding class paths are at the core of the java language and using an IDE that supposedly controls this for you is not helping your situation. my suggestion to you is to use a text editor and the command prompt to create and run your java programs. you won't believe how much more you understand after fooling around with java this way for a few months.
good luck.

Using a business rule to set the substitution variables

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Thanks for your response, John.
I am trying to set the Substitution variable through a data form on which the Business rule is attached.
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Setting the CLASSPATH from the JVM by a class

Hy experts
I have an application thats searching a jar file and have to access classes from this jar file.
There are two ways to do this:
1.
Loading the jar file byte by byte and create the classes to load them into memory. This is the hard way.
2.
Setting the CLASSPATH variable in the running program! Thats the easy way! May how does it works?
Is there any possiblity to set the classpath in a running application or only in the shell?
Thanks for help
konrad

the classpath is readin when you run the JVM ie issue the 'java' command, the environment cant be altered to update a new classpath. However, why not just put the files you wish to load at runtime within the current classpath you've setup. If you use the System.loadLibrary(), you should be able to pick up the classes you wish to readin at run time via this approach.
good luck
rob

How to set the CLASSPATH in Unix Server

Hi, everyone~
Do anyone noe how to set the CLASSPATH in the hp-ux server? I tried the setenv CLASSPATH, but not working.. I think should use export. But my jsp pages still cannot working, dunnoe y?
I wonder is the hp-ux support jsp and servlet or not?
In order to let the jsp and servlet to run properly in the unix server, what kinds of steps should taken ?
Hope somemore who experience with this situation b4 can give me some guidance.. Thanks~~
regards,
tzeyik

Tomcat ignores any and all CLASSPATH environment variables. Even if you could figure out how to set it, Tomcat wouldn't use it.
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Hi Timo,
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Later in the process form request for the fired event, i am trying to handle the rendered property of the messagetextinput. Is this a right approach?
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How can i set the classpath??

CAN ANYONE PLEASE HELP ME HOW TO SET THE CLASSPATH IN WINDOWS ME ,WHAT IS THE RIGHT CODE TO SET THE CLASSPATH I AM USING JDK1.3 VERSION.
THANK YOU VERY MUCH
ERICK LUCCIO

Try this way Start->Program->System tools-> System Summary>startup .Try to find the variable classpath,make sure the path is correct.The classpath contain the the *.java & *.class you save. I'm also new in java .This path & classpath question is so trouble to me .Now i'm running jdk1.3.1_2 in WINME ,WINNT AND WIN2000 IN no problem.........

Setting the classpath of classes12.zip for Tomcat

Hi
I am using Apache Tomcat webserver and while trying to run a jsp page which intializes oracle.jdbc.driver.OracleDriver it throws an error
java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
Please suggest how to set the classpath of classes12.zip in Apache Tomcat
My Code Snippett
<%@ page import="java.util.*,java.sql.*,javax.servlet.*"%>
<body>
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%>

The simplest way to do this is to copy classes12.zip to the WEB-INF/lib directory. The JSP should then find this automatically.
As a side note, that is an ancient JDBC driver - you might want to upgrade to something from this millennium.

Java newbie questions...Setting the classpath in Unix

When you set the classpath, how do you include anything already in the classpath? For instance, if your profile sets your classpath to
"/home/weblogic/:home/weblogic/weblogic.jar, and you want to add MyJar.jar to it, can you enter:
export classpath=~:MyJar.jar
My question really boils down to how do you prefix the existing CLASSPATH environment variable to any new classes or jars you want to add to it. I think it's the tilde, but I'm not sure.

In csh, the CLASSPATH environment variable is modified with the setenv command. The format is:
setenv CLASSPATH path1:path2
In sh, the CLASSPATH environment variable can be modified with these commands:
CLASSPATH = path1:path2:...
export CLASSPATH
====
(From the Sun documentation)
or, in sh,
export CLASSPATH=path1:path2
should work

How to set the DISPLAY variable to run admsi.pl?

Dear Experts,
I'm trying to patch Oracle apps R12 using admsi.pl.
hostname: black
APPS db: VIS
But I keep getting the error:
Please set the DISPLAY variable and re-run this script
This is what I did:
VIS database and listener are already running.
login to the linux server as unix user: applmgr
cd /oapps/applmgr/VIS/apps/apps_st/appl/
. APPSVIS_black.env
cd /oapps/applmgr/VIS/apps/apps_st/appl/ad/12.0.0/bin/
admsi.pl
Invoking Oracle Patch Application Assistant....
Please set the DISPLAY variable and re-run this script
huh ?
set | grep -i "display"
DISPLAY=:0.0
set | wc
435 486 25235
I notice that there are 36 .env files!
For applmgr alone!!
find /oapps/applmgr/ -type f -name "*.env" | wc
36 36 2626
For oracle, there are another 7 .env files!
find /oapps/oracle/ -type f -name "*.env" | wc
7 7 513
Did I get the environment (env) file correct?
Or do I need to run a few more env first?
If so, which ones?
What would the order of operations be?
sqldeveloper has given me problems with Display sometimes.
But even sqldeveloper works fine.
What is the secret to get admsi.pl to run in the normal manner?
Thank a lot!

Thanks a lot, that worked! So the perl script was wrong.
In the meantime, I had done this, and it seemed to work:
admsi.pl -debug
Gathering Information..
Enter the patch_top : /oappsinstall/update12.1.1/7303030
Enter the APPS user password:
Logfile for this session is located at admsi.log
Generating installation instructions for patch 7303030..
Updating database....
install_7303030.html generated successfully
install_7303030.txt generated successfully
cat /oapps/applmgr/VIS/apps/apps_st/appl/ad/12.0.0/bin/admsi.log
Executing begin :value := ad_manual_step_object.is_step_already_done('per_hrglobal','120.2.12010000.1'); end;
Generating installation instructions for patch 7303030..
Updating database....
install_7303030.html generated successfully
install_7303030.txt generated successfully
Performing final cleanup..
Do you think this worked ok?
Thanks again!

Setting Up CLASSPATH variable

Dears,
In PI 7.1 we are getting one error:
We are getting an u201CSAPClassNotFoundException:u201D. The reason for this is as I got we need to set the classpath in the PI Server.
Please do as below:
The following is an example of the CLASSPATH statement that is used for a Unix/Linux application:
CLASSPATH =.:/home/usr1/mssqlserverjdbc/Driver/sqljdbc_2.0/enu/sqljdbc.jar
Please suggest how can I set this path on AIX ,Is it a env variable.If yes then as I am getting aftre setting ones and logging out this variable will get dissaper.
So please suggest how can i set this path.
SHivam

Hi,
Where you are facing problem?? r u facing problem when you using JDBC Communication Chanels??
Regards,
Raj

Setting the classpath

doing a jsp page which calls for:
<%@ page import="java.sql.*" %>
<%@ page import="javax.sql.*" %>
<%@ page import="sun.jdbc.rowset.*" %>
<%@ page import="java.util.*;" %>
at the top of the page , so i downloaded the jar files that i needed and set the classpath to:
C:\jdk1.3.1_01\rowset.jar;C:\jdk1.3.1_01\jdbc2_0-stdext.jar;C:\jdk1.3.1_01\jndi
this is the first time ive set the classpath
but when i run the page i get loads of Error: Could not find package named:
anyone no what im doing wrong?

When you say you "set the classpath", does that mean that you changed the system CLASSPATH environment variable, or that you went into the configuration of whatever it is that's running your JSPs and put those jars and directories into the appropriate place?

How to set the classpath on OS X 10.6

I am trying to build a web site (first time from mac) I have written a java swing applet in eclipse which works great when run from inside eclipse - however, when I run it from Safari or Firefox via .html doc the applet isn't displayed - I don't get an error message it just doesn't display. I have been able to run other applets this way but this one uses swing and I think it isn't able to find the classes.jar file. I believe if I can set the classpath to point to the classes.jar it should then work or perhaps I am way off base. Any other suggestions or how can I set classpath. I tried echo $CLASSPATH but it appears it isn't set with the exception of perhaps the default as no path is displayed. I really need to get this going as it is holding up the release of its counter part iPhone app.
thanks,
PMA

It's possible, then, that the computers running Snow Leopard have a software problem. I would start by reinstalling Snow Leopard on them.
Reinstall OS X without erasing the drive
1. Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
2. Reinstall Snow Leopard
If the drive is OK then quit DU and return to the installer. Proceed with reinstalling OS X. Note that the Snow Leopard installer will not erase your drive or disturb your files. After installing a fresh copy of OS X the installer will move your Home folder, third-party applications, support items, and network preferences into the newly installed system.
Download and install Mac OS X 10.6.8 Update Combo v1.1.

Setting my Classpath variable

Hi
Could someone please help me get the classpath variable working
C:\Java\sampledir\Java Game Programming;.;C:\Program Files\s1studio_jdk\j2sdk1.4.1_02\lib\tools.jar
This is what I have in the Classpath variable now in my Windows 2000 O/S
Now from what I gather with having this set up in the classpath I should be able to compile anything in the Java Game Programming Folder and I can do it right from the C:\ prompt. Am I correct in thinking this?? or do I need to be in the directory with the file I want to compile??
The error message I recieve after typing from the C:\ prompt javac GameOver.java
produces this error message
error: cannot read: GameOver.java
1 error
Now I do know everything within the file is correct because it compiles and runs successfully in Sun One Studio. :)
Thank you
Scott

The classpath is a way for the compiler to resolve class names it encounters in the source files.
But you still have to give it the exact path to your source file !
you don't need to be in the directory of the file, you can just give its absolute path from whatever directory you happen to be.

T o set the classpath

my forlder is :C:\Documents and Settings\india
jdk is in:C:\Program Files\Java\jdk1.5.0_11\bin
can any body can help me to create a classpath for my folder

set classpath=C:\Program Files\Java\jdk1.5.0_11\binDon't do this.
The term "classpath" is used in two senses: it can mean the folders where user classes are located, and it can refer to an environment variable of the same name used for the same purpose. Since you won't be putting classes in he bin folder, and you will be putting them elsewhere, the setting posted makes no sense.
For a discussion of how classes are found and on setting the class path see the links at the top of this page: http://java.sun.com/javase/6/docs/technotes/tools/#general
I agree with the comment at the start of the start of the section on setting the classpath (http://java.sun.com/javase/6/docs/technotes/tools/windows/classpath.html), that it is better to specify the classpath by using the -classpath switch with the Java tools (java, javac, jar). In this case you don't use a classpath environment variable at all.
A typical HelloWorld is compiled and run with:javac -classpath . HelloWorld.java
java -classpath . HelloWorld

Novice Trying to Set The CLASSPATH Variable

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