Path and classpath

How do i set path and classpath in java? why it is needed

ramyabaskar wrote:
How do i set path and classpath in java? why it is neededTypically you do not set these in java.
You set the path in the operating system shell.
You set path so you can launch java by just typing java
instead of having to type the full path to "C:\Program Files\Java\jre6\bin\java.exe".
You pass the desired classpath to java when you launch java with the classpath option or set it in the operating system shell using the CLASSPATH env.var.

Similar Messages

Difference between path and classpath

Difference between path and classpath?

PATH - set of paths there executables will be found.
CLASSPATH - set of paths and archives there class files will be found.

Set path and classpath in ANT

by using ANT, how can set the JDK path and classpath..
jdk version exists in the : C:\Program Files\Java\jdk1.6.0
This is the build.xml that i need to modify!
-Do i need to have a serperate JAVA_HOME variable?
<?xml version="1.0"?>

<project name="Chat" default="jar" basedir=".">
   
   
   
   <target name="init">
      <property name="appname"        value="chat"   />
      <property name="src.dir"        value="src"               />
      <property name="lib.dir"        value="lib"              />
      <property name="build.dir"      value="Chat"            />
      <property name="build.compiler" value="classic"          />
   </target>
   
   
   
   <target name="prepare" depends="init">
      <mkdir dir="${lib.dir}" />
      <mkdir dir="${lib.dir}/META-INF" />
      <mkdir dir="${build.dir}" />
   </target>
   
   
   
   <target name="classes" depends="prepare">
      <javac srcdir="${src.dir}/oracle/otnsamples/oc4jjms"
             destdir="${lib.dir}"
             includes="**" />
   </target>
   
   
   
   <target name="j2ee-meta-inf" depends="classes, prepare">
      <copy file="${src.dir}/META-INF/application-client.xml"
            tofile="${lib.dir}/META-INF/application-client.xml" />
      <copy file="${src.dir}/images/oralogo.gif"
            tofile="${lib.dir}/oralogo.gif" />
   </target>
   <target name="jar" depends="j2ee-meta-inf">
   <jar jarfile="${build.dir}/${appname}.jar"
       basedir="${lib.dir}" manifest="${src.dir}/META-INF/MANIFEST.MF"/>
      <delete dir="${lib.dir}" />
   </target>
</project>Message was edited by:
jugp

[url ='http://www.jguru.com/forums/home.jsp?topic=Ant']answer here

How to go about Setting PATH and CLASSPATH?

I have problems compling the helloworldwww in the core programming.the error was:
Exception in thread "main"java.lang.NoSuchMethodError:main
my java programs are in c:\program files\java\bin
My path :
PATH=C:\WINNT\system32;C:\WINNT;c:\program files\java\bin
My classpath
set CLASSPATH=C:\WINNT\system32;C:\WINNT;c:\program files\java\bin.jar;.
is there any error in my paths, if yes how to i go about setting the path and classpath??Im running on winXP.j2sdk1.4.1_02.

set CLASSPATH=.;c:\program files\java\bin.jar;c:\program files\java\bin

Problem in setting path and classpath for java in RedHat linux 9

Hi ,
i am not able to set the PATH and CLASSPATH for j2sdk1.4.2_06
I have tried with export PATH=$PATH:/usr/j2sdk1.4.2_06/bin
and export CLASSPATH=$CLASSPATH:/usr/j2sdk1.4.2_06/lib
in terminal
but i want to configure it as permenant way for the jre and jdk
and we should only type java or javac according to the requirement
regards mihir...

type those in .bashrc ... save and exit
then at prompt, type 'source .bashrc'
this is the permanent solution ...
bhalo thakun

Setting PATH and CLASSPATH in Java Applet

Hi,
I have been wondering if there was a way to set the PATH and the CLASSPATH in the HTML file within the <APPLET> tag...
What I would like to do is to read some xml files outside of the directory where my html file is located to run my test application with the configuration on my computer.
(The applet and the html file from which it is called is on my local host.)
Therefore, I have seen that in order to access local files, I have to sign my jar files, which I did.
But the tricky part is that for my test application to work, I need to set the PATH and the CLASSPATH... and I have no idea if this is possible or not...
I have seen that:
*CODEBASE: I specify here the main directory where my jar files are located
*ARCHIVE: I specify here the list of my jar files
In my case:
CODEBASE=../../ (this is the root directory of my whole application)
ARCHIVE=dir/lib/jar1.jar,dir2/jar2.jar,configXML/,etc...I don't know if I can specify the filepath of my xml files (here "configXML") in ARCHIVE (I suspect we can only specify jar files there... right ?)
Maybe I can use ARCHIVE this way to specify my CLASSPATH (and well... not completely the way I would like I suppose), but what about the PATH ?
I have been searching this for soooo long now...
Any help, hint or suggestions (I might doing this all the wrong way...) would be greatly appreciated !
Thanks in advance !

You need to use the code attribute to specify the class that contains the main method to start the application.
<applet code="myPackage.myClass.class" codeBase="http://www.someServer/someFolder/" archive="myApplet.jar">
I hope this solves part of your problem at least.
Andrew

Setting Path and Classpath in Linux environnement

Hello,
I use to develop with JAVA under Windows platform,
now i am using j2sdk under Mandrake 8.0 , i dunno how to set my PATH end Classpath variables, could you show me how?
Thanks

Put this in your user's .bashrc file at the end of it.
JAVA_HOME=/path/to/java/install
PATH=$PATH:$JAVA_HOME/bin
export JAVA_HOME PATHAnd buy a book on Unix/Linux.

About path and classpath in linux

How to set classpath and path in Linux.
thank you very much!

The class path can be set using either the -classpath option when calling an SDK tool (the preferred method) or by setting the CLASSPATH environment variable. The -classpath option is preferred because you can set it individually for each application without affecting other applications and without other applications modifying its value.
% sdkTool -classpath path1:path2...
-or-
% setenv CLASSPATH path1:path2...
where:
sdkTool
A command-line tool, such as java, javac, or javadoc. For a listing, see SDK Tools.
path1:path2
Paths to the .jar, .zip or .class files. Each path should end with a filename or directory depending on what you are setting the class path to:
For a .jar or .zip file that contains .class files, the path ends with the name of the .zip or .jar file.
For .class files in an unnamed package, the path ends with the directory that contains the .class files.
For .class files in a named package, the path ends with the directory that contains the "root" package (the first package in the full package name).
Multiple path entries are separated by colons.
The default class path is the current directory. Setting the CLASSPATH variable or using the -classpath command-line option overrides that default, so if you want to include the current directory in the search path, you must include "." in the new settings.
Classpath entries that are not either a directory or an archive (.zip or .jar file) are ignored.

How to set the variable of "path" and classpath" in winxp

I down a sdk1.4.2_01 and use it in windows xp system,I can use "javac";
but when I run "java *****"(eg: java abc),it do not work.
The infomation is "Exception in thread "main" java.lang.NoclassfoundError:"
I set my source code "C:\j21".
PATH:
C:\j2sdk1.4.2\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem
CLASSPATH:
C:\j2sdk1.4.2\lib\tools.jar;.;c:\jdk1.4\lib\dt.jar;C:\j21;
I am a new user and need your help.
Email: [email protected]

http://java.sun.com/j2se/1.4/install-windows.html#Environment
hope this help!!! java tutor style :D

How to set BO SDK path and classpath in cmd

Hi,
I am new to BO sdk .. I am working on BO XIR2 SDK. I need to run the java program using command prompt. In lib directory of the BO SDK, I have jar files.Could anybody let me know how to set the path, classpath related to BO SDK in command prompt?
Regards,
Nisha

Hi Nisha,
Use like this
set path=%PATH%;C:\Program Files\Java\jdk1.6.0_30\bin
set CLASSPATH=%CLASSPATH%;D:\javaprograms\JAR Files\sqljdbc4.jar
cd C:\Program Files\Java\jdk1.6.0_30\bin
java happy2
In line1 : We are setting the Path
    line2 : We are setting Classpath
    line3 : Navigating to actual execution directory
    line4 : Executing the actual java class file
Hope this helps!
Regards,
Mani

How do I sett path and classpath in win98

I have downloaded I have tried but it doesn't work...
I just don't know how to do, almost tried everything (not the
right way of course)!
I would really be happy if someone could tell me how to do!

The installation instructions are supplied with the JDK download. Otherwise, I found them on this site after 1 minute of searching
http://java.sun.com/j2se/1.4.1/install-windows.html
Work your way through these, and if you are still having troubles, feel free to post back here with details of the specific problem you have.

I am trying to install itunes 10 but error messages saying could not update the environment variable PATH and CLASSPATH appear. how can i fix this?

this is really frustrating ive been googling for hours trying to find the solution! any help would be greatly appreciated. I have windows 7 and the newest gen ipod nano

For general advice see Troubleshooting issues with iTunes for Windows updates.
The steps in the second box are a guide to removing everything related to iTunes and then rebuilding it which is often a good starting point unless the symptoms indicate a more specific approach. Review the other boxes and the list of support documents further down the page in case one of them applies.
Your library should be unaffected by these steps but there is backup and recovery advice elsewhere in the user tip.
tt2

Problem with Class and Classpath

Hello ME Windows Users, now before you place a wry smile on your face, I have a problem with path and classpath. Stop it, I can see you smiling!
By visiting the the last 10 pages of the forum and reading Sun installation notes, some tooldocs and by given some answers by some nice people, I have become an expert in turning off my computer, about 10 times/hr. I still am trying to make my first cup of java.
With the ME computer,
I'm unable to right click on the desktop and go to properties, advanced,
I'm unable to go go start, run, sysedit,
I'm unable to change the ms-dos window of autoexec.bat, it just shuts down.
Now before you tell me, I should of bought a different computer, the only place I can find to modify the path and classpath is in the environment which is in system configuration under tools. Here I have placed numerous configurations, like
C:\java>set path=%path%;c:\j2sdk1.4.2\bin
C:\java>set classpath=%classpath%;.;
;java_dir\bin where ;java_bin is c:\j2sdk1.4.2
.; java_dir\bin; %path% where ;java_bin is c:\j2sdk1.4.2 and the list goes on.
But, I know you are still smiling, the % signs comes up in a dialog box, saying too many, and will not convert the text to the environment to be saved when I close down for the tenth time in the last hour.
Can someone help me before I make a real cup of coffee and accidentally drop it on the ME box.
Have a laugh on me Mik.

C:\java>set path=%path%;c:\j2sdk1.4.2\binGood
But it is no good because it has to many % and a dialog box appears, saying you have too many parameters.
Are you saying I have to shutdown again to answer your ?
From the HELP menu-
To confirm startup commands line by line
Click Start, and then click Shut down.
Click Restart, click OK, and then press and hold the CTRL key until the Windows Startup Menu appears.
Enter the number for Step-by-step confirmation, and then press ENTER.
For each command you want to run, press Y.
If the command runs successfully, you are prompted with the next command.
If the command does not run successfully, you receive an error message.
To skip a command, press N.
Mik

Set the path and class path in windows xp professional

hi guys....could any one tell me step by step on how to set the path and classpath on windows xp professioanl? This is my path and classpath
set path = %path%;C:\jdk1.3.1_02\bin;c:\JOpen672.jar;c:\
set CLASSPATH = c:\j2sdkee1.3.1\lib\j2ee.jar;c:\JOpen672.Jar;c:\;c:\postgresql.jar;c:\jai_core.jar
not working please help me on this thanks alot.
novicepro

Below is a Helloworld program, copy and paste it into your editor and save it as "HelloWorld.java" Use capitalization, Java is case-sensitive. If you're using Notepad, quote the name when saving, otherwise Notepad adds ".txt" to the name. Go to DOS and check that you've got the file where you want it and that it's named correctly.
----------program HelloWorld.java--------------
public class HelloWorld {
public static void main (String[] args) {
System.out.println("Hello World!");
In the same directory as HelloWorld.java, enter "javac" - the program should print out a list of options, if not, set your PATH - see below.
In the same directory as HelloWorld.java, enter "javac HelloWorld.java" and the javac compiler will create HelloWorld.class. If it was successful it will not give any messages. Check that the file is created.
In the same directory as HelloWorld.java, enter "java -cp . HelloWorld" with the spaces and the period. The program will run.
Here is additional information:
The Path is a set of pointers that Windows uses to locate programs that you execute, like javac.exe and java.exe. This setting is explained here:
http://java.sun.com/j2se/1.4/install-windows.html
Scroll down to: 5. Update the PATH variable
(you should have already done this as part of the s/w installation)
The CLASSPATH is another set of pointers that is used by Java to find the files that you create and want compiled and/or run. This setting is explained here:
Setting the Classpath:
http://java.sun.com/j2se/1.4/docs/tooldocs/windows/classpath.html
[NOTE: always start your classpath with ".;" which means the current directory. See my classpath, below]
How Classes are Found:
http://java.sun.com/j2se/1.4/docs/tooldocs/findingclasses.html
Examples:
This is my path
PATH=C:\WINDOWS;C:\WINDOWS\COMMAND;C:\BATCH;C:\J2SDK1.4.0_01\BIN;C:\PROGRA~1\UTILIT~1;C:\PROGRA~1\WIN98RK
This is my classpath
CLASSPATH=.;C:\mjava;C:\mnrx;C:\NetRexx\lib\NetRexxC.jar;C:\j2sdk1.4.0_1\lib\tools.jar;C:\NetRexx\NrxRedBk

Path in Classpath not found

Hi, all!
When I create a Web Dynpro-DC, I receive the following warnings:
[Warning]: Path in Classpath for file _webdynpro_model_dynamicrfc.jar not found.
and the same for all other Used DCs.
When I then rebuild the project, none of the referenced packages can be found.
Anybody got an idea?
Regards,
Thomas

Hi Thomas,
Are you building a local Web Dynpro DC with NWDS SP15? There's a bug in the SP15 installation: It "forgets" to copy all files starting with a dot (I have noticed that all .dcdef and .buildplugin are missing, I don't know if there are more dot-files). Because of this none of the local SAP standard DCs work. You can copy these files manually in a command prompt window. Makes sure you exit your NWDS before entering the command below while in the installation source folder that contains the "eclipse" folder.
xcopy *.dcdef "C:\Program Files\SAP\JDT" /s
Kind regards,
Pascal

Path and classpath

Similar Messages

Maybe you are looking for