Tomcat Installation and setting Java Classpath

Please help me in setting up Java classpath for Tomcat Server. I am unable to start the Server itself.

try this it worked for me..install Tomcat and Ant in 2 seperate directories, if you are win98 or less edit your autoexec.bat file and set the class paths as follows
set PATH=C:\jdk1.3\bin;%PATH%
set ANT_HOME=C:\Ant
set TOMCAT_HOME=C:\Tomcat
set JAVA_HOME=C:\jdk1.3
If you are using windows 2000 or NT you have to goto control panel --> system --> advanced and click environment variables
for name type in say TOMCAT_HOME and for value type in c:\Tomcat
restart your computer.
Then goto tomcat\bin and type startup....in a browser type in http://localhost:8080 and you are in
hope this helps

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Help, how to install jvm and set the classpath using a batch file

hello,
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i would like to know if anyone can tell me how to go about iti.e. how can i install the JVM using a batch file and then place the javamial packages etc in the apropriate directory .
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hi,
I have windows and I use it.
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Need Help Setting Java Classpath

I have installed JCreator LE and the JDK 1.6.02 and the JRE 1.6.02 as well as the API's into my JDK doc directory.
I can't figure out how to set the classpath to allow me to run java programs and I can't figure out how to get java.exe to run either.
WinXP doesn't come with an autoexec.bat file so that route for setting my classpath is out... I can get to the DOS command prompt just fine but don't know what to type. When I try running any program like java.exe from the JDK a small DOS like box appears for a split second and then disappears.
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Thanks for your help. I set my CLASSPATH option
within system/advanced/setvar to: "C:\Program
Files\Java\jdk1.6.0_02\bin" Which is precisely where
my jdk is located. Wrong. That directory needs to be in your PATH, not CLASSPATH. PATH tells the operating system where to find .exe files like javac.exe and java.exe.
CLASSPATH tells the JVM where to look for your .class files
I've tinkered around and around and I still can't get
it to work... My confidence in my computer savyness
is beginning to deteriorate... I've been reading two
books on java and believe I'm understanding OO pretty
well into the later chapters at present. I read
through Suns online tutorial as well and just am not
understanding what I'm doing wrong here. Thanks-Read the docs for both javac.exe and java.exe. Both take a -classpath option when you run in a command shell. That's the correct way to specify CLASSPATH.
Do not use an environment variable. That is the wrong way to go about it.
When you graduate to application servers it'll be a different matter, but by then perhaps you'll understand better.
%

Setting Java CLASSPATH on WINDOWS

suppose i have the following values to set for CLASSPATH
C:\Program Files\Common Files\System\Mapi\1033\NT
and
abc-win32
is this correct
C:\Progra~1\Commo~1\System\Mapi\1033\NT;abc~
thanks.

I think that you should use long file namesi don't understand "long file names". just for my own knowledge, how can this
very thing be done?

Setting java classpath [SOLVED]

Hi everybody,
I am sure this is not hard, but I have been looking for some time now and just couldn't figure out how to do it. Trying to run simple java applications (I am just learning...) I allways get this error
Exception in thread "main" java.lang.NoClassDefFoundError: /opt/java/jre/bin/
Caused by: java.lang.ClassNotFoundException: .opt.java.jre.bin.
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
So after doing some research I am pretty sure this is because my classpath is not set, but I can't figure out the correct directory. I assumed this would be
/opt/java/bin
So I added these lines to my .basrc
export PATH=/opt/java/bin:$PATH
export JAVA_HOME="/opt/java/"
export CLASSPATH=.:/opt/java/
I think java is installed just fine, cause I can run eclipse without problems..
But it doesn't work... so please help me :)
Last edited by daJense (2009-05-25 14:10:49)

First, Thx for replying.. so here is what I get using echo
[jens@jense-mobile Kap02]$ echo $PATH
/opt/java/bin:/opt/java/bin:/bin:/usr/bin:/sbin:/usr/sbin:/usr/share/eclipse:/opt/java/bin:/opt/java/jre/bin:/opt/kde/bin:/usr/share/netbeans/bin/:/usr/bin/perlbin/site:/usr/bin/perlbin/vendor:/usr/bin/perlbin/core:/opt/qt/bin:/home/db2inst1/sqllib/bin:/home/db2inst1/sqllib/adm:/home/db2inst1/sqllib/misc:/home/db2inst1/sqllib/db2tss/bin
[jens@jense-mobile Kap02]$
Now for studying I try to run simple java apps from commandline. Using the -cp option I got my programm to work (it's "HelloWorld"). So if I set up a directory
~/javaapps/
How would I set this path so I don't have to use the -cp option every time I invoke an app

Set java classpath.

hai,
how to export- set classpath on linux platform.where is jdk located on fedora linux.

hai,
i got all u had told,but classpath is set compiles and run only one java class.
for ex if a class A object is called by class B which has main method and both are put in same folder,their i am finding prob's.problem is class B(main class) doesn't find class A objects and gives errors.

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Greetings,
Thank you to all who take the time to read this especially those who can provide some answers!
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Question #2:
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I am not aware of any trusted.certs file being distributed with Java. Are you referring to the cacerts file?

Issue in setting java classpath using bash

I tried creating a script file for executing my java code in my linux machine.Below is the script which i created.
#!/bin/sh
HOME=`pwd`
JAVA_HOME=$HOME/jre
CLASSES=$HOME/classes
CLASS_PATH=$CLASSES/Testing.jar:$CLASSES/server/Server.jar
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#!/bin/sh
HOME=`pwd`
JAVA_HOME=$HOME/jre
CLASSES=$HOME/classes
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julians wrote:
>
You think?? Why don't you just find out? The classpath is one of the system properties, so just write a Java program which simply writes all of the system properties to stdout. Then look at the system property which contains the classpath.
Sorry you didn't understand my question.Your answer is irrelevant to my questionThen you should explain your question better, using something less totally useless than "not working".
My question is I can read.
It has nothing to do with bash.There is some issue with java in the way it treats the argument after -cp option.If i can find out why should i post it here?.No. Java isn't treating any arguments. Your shell (bash) is treating the arguments. If you think it's Java, then you should investigate that. Which is why I posted what I did. If you think it's irrelevant then it must not be Java causing the problem. Of course you didn't even try it. Time-waster.
Please simulate this issue and respond to my postYou want me to buy a computer and install bash and try to reproduce your problem? Don't be ridiculous. Do your own work.

SQl developer installation and set up the connections

Hi,
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Pls guide from the basic
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cuteprathyu999 wrote:
Hi,
I m a new learner of Oracle - SQL. My doubt is can i have an test environment( a dummy) connection in SQL developer for my practice purpose in my local laptop.
Do i need to install Oracle to work with SQL developer in my system.Wat all I should have to fulfill the abve?
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Hello,
During installations, I got the following error:
1)
Microsoft.SqlServer.Configuration.Sco.DirectoryAttributesMissmatch: Folder C:\Program Files\Microsoft SQL Server has an unsupported attribute (Compressed) set. Please resolve this issue by removing the unsupported attribute from the folder using folder properties
dialog.
2)
Microsoft.SqlServer.Configuration.SetupExtension.CompressedDirException: The specified directory, "C:\Program Files\Microsoft SQL Server\", for the INSTALLSHAREDDIR parameter is not valid because this directory is compressed or is in a compressed
directory. Specify a directory that is not compressed.
3)
Microsoft.SqlServer.Configuration.SetupExtension.CompressedDirException: The specified directory, "C:\Program Files (x86)\Microsoft SQL Server\", for the INSTALLSHAREDWOWDIR parameter is not valid because this directory is compressed or is in a
compressed directory. Specify a directory that is not compressed.
Can you help with these errors?

Hello,
The following resources show a few ways to list those directories.
https://superblackbook.wordpress.com/2010/07/20/powershell-list-compressed-dossiersfichiers/
https://social.technet.microsoft.com/forums/windowsserver/en-US/153c2740-e2b6-47b8-beb1-1da7ba08b1f1/find-compressed-file-or-folders
Hope this helps.
Regards,
Alberto Morillo
SQLCoffee.com

How do I get iTunes to recognize my external, wireless-networked hard drive (Western Digital) during installation and set-up of iTunes?

Hello,
I'm re-installing iTunes for Windows 7 (64-bit) due to a bug that occured with the iOS7 update. The Genius Bar recommended that I uninstall and re-install iTunes from scratch. All of my music is located on a WD external hard drive that's connected wirelessly to my PC. I didn't have this problem until the iOS update for iphone 5, v.7.0.
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I didn't relate this; now iTunes will not install on my PC when pointed to my external, wireless-networked hard drive. It appears that it doesn't recognize it.

How to Install and Configure Java and Tomcat

Hi Everybody,
I am using the following versions of java and tomcat:
JAVA: j2sdk-1_4_2_13
Tomcat: jakarta-tomcat-5.0.5
I tried to configure several times both but everytime the result is the same. I am setting the following variables:
PATH: .;D:\j2sdk1.4.2_13\bin;D:\Tomcat 5.0\bin
CLASSPATH: .;D:\j2sdk1.4.2_13\lib;D:\Tomcat 5.0\common\lib\servlet-api.jar
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Please correct what mistake i am doing again and again. I appreciate your effort.
Thanks in advance.
Himanshu

Fine sir, I will tell evrything in detail what steps i am following during installation and configuring java and Tomcat.
1) I am using the following versions(exe) of java and tomcat:
JAVA: j2sdk-1_4_2_13-windows-i586-p
Tomcat: jakarta-tomcat-5.0.5
2) Then, i follow exactly the same variable names and values to configure java as mentioned below to make java work under User variables header:
PATH: .;D:\j2sdk1.4.2_13\bin
CLASSPATH: .;D:\j2sdk1.4.2_13\lib
JAVA_HOME: D:\j2sdk1.4.2_13
Above steps i follow only for installing java. And it also not working properly. If i run my .java file from the destination of the file then it will be execulted but if i try to execute from any other location then it doesn't, it shows the following message in the DOS prompt:
error: cannot read: Hello.java
1 error
Now, please correct what mistake i am doing.
Thanks
Himanshu

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?

Starting tomcat server after setting classpath for java

Sorry if this is nothing to do with java, it is more to do with starting tomcat server.
Tomcat server has been working totally fine, but when I wanted to compile a java servlet I wrote for it, I needed to run a BAT file called gojava in MS-DOS that had the classpath for java to work properly. I then attempted to run Tomcat, but just got 'bad command'. As long as I don't start up java by setting the classpath, tomcat will work, but as I need java to write servlets and then to test them without restarting my PC each time, how do I get tomcat to work?
Thanks
Hannah

Sounds like your batch file is changing your path, not your classpath. If you're getting "Bad command or filename" when attempting to run Tomcat, it can't find the executable. Check out the .bat file and see what it's doing (maybe even post it here for further clarity). If it's changing your path at all, make sure it includes a %path% to indicate that it simply wants to append items to the path, not overwrite it completely. Sorry if i'm way off base with my suggestions, but it sounds like that's where the problem's going to be, especially if rebooting resolves the problem.

How to set the classpath and path from the jsp to call java class function

Hi Exprets,
I have a requirement to call a java class function which returns a hashmap object from the jsp. The java class in present in one jar file and that jar file is location somewhere in unix path. So the requirement is to set the classpath for that jar file and then create the object of the java class and then call the function.
If any one know how to achieve it, please reply as soon as possible.
thanks in advance,
swapna soni.

It is never advisable to store large data sets in the session. But it will depend on a lot of factors:
1. How costly is the query retrieving the data from the database?
If it's a complex query with lots of joins and stuff, then it will be better to store it in the session as processing the query each time will take a lot of time and will decrease performance. On the other hand if the query is simple then it's advisable not to store it in the session, and fetch it each time.
2. Are there chances for the data to become stale within a session?
In this case storing the data is session will mean holding the stale data till the user session lasts which is not right.
3. How many data sets does the session already holds?
If there are large no. of data sets already present in the session, then it's strictly not advisable to store the data in the session.
4. Does the server employ some kind of caching mechanism?
Using session cache can definitely improve performance.
You will have to figure out, what is the best way analyzing all the factors and which would be best in the situation. As per my knowledge, session is the only place where session specific data can be stored.
Also, another thing, if the data set retrieved is some kind of data to be displayed in reports, then it would be better to use a pagination query, which will retrieve only the specific no. of rows at a time. A navigation provided in the UI will retrieve the next/previous data set to display.
Thanks,
Shakti

Tomcat Installation and setting Java Classpath

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