Set package in classpath?

Hi, I am wondering how to set the jar file containing the package (org.ccil.cowan.sax.*) in my classpath ? Do I need to download anything first? HELP!!!!

Setting the Classpath:
http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/classpath.html
[NOTE: always start your classpath with ".;" which means the current directory]
How Classes are Found:
http://java.sun.com/j2se/1.4.2/docs/tooldocs/findingclasses.html
Of course, the jar must exist somewhere in your computer file system; its location and name (ie, the full path spec) is what you use to create the classpath entry.

Similar Messages

How to set packages and classpath

Hi,
I want to know about packages and classpath. I have these questions
1, If I put a class in a package(work.util) is it necessary to put the java file in the same directory/directory hierarchy as mentioned in the package declaration. I have to compile this class, run it from main method and must be able for other classes to import.
2. If a package have subpackages(work.util.db) do I have to set the classpath to subdirectory also to run that class.
3. If a class is in package is it possible to run the class without prefixing the package name. I need to do this in the text editor so that I can run any program by pressing a hot key.
rgds
Antony Paul

1, If I put a class in a package(work.util) is it
necessary to put the java file in the same
directory/directory hierarchy as mentioned in the
package declaration.Strictly speaking, this isn't covered by the spec - it depends on what compiler and ClassLoader you are using. If you're using Sun's JDK, then yes.
2. If a package have subpackages(work.util.db) do I
have to set the classpath to subdirectory also to run
that class. No. You should add the directory above work/util/db to your classpath. You should not add work, or work/util or work/util/db.
E.g., if your Java files are in C:/MyProject/JavaSrc/work/util/db, and the package name is work.util.db, then you should have C:/MyProject/JavaSrc on your classpath (or have "." (dot) on your classpath, and compile and run from that same directory).
3. If a class is in package is it possible to run the
class without prefixing the package name. I need to do
this in the text editor so that I can run any program
by pressing a hot key.If you mean "in order to run work.util.db.Main do I need to type java work.util.db.Main, or just java Main", then you do indeed need the fully qualified class name (otherwise, how would the runtime environment know which class you mean? - there could be any number of classes called Main in any class, and it would have to search every directory and subdirectory on your classpath to find them.

Package and CLASSPATH

Hi,
I have a hard time understanding the package and CLASSPATH. I want to have a solid understanding of it. I read some tutorials online but didn't make me fully understand. How does declaring a package effect the CLASSPATH? Say I have following:
(This is from one of the tutorial- http://home.cogeco.ca/~ve3ll/jatutor4.htm)
C:\myclasses\world\moon\HelloMoon.java
C:\myclasses\world\HelloWorld.java
HelloMoon.java is defined as
package world.moon;
public class HelloMoon {
private String holeName = "rabbit hole";
public String getHoleName() {
return holeName;
public void setHole(String holeName) {
this.holeName = holeName;
public static void main(String[] args){
HelloMoon moon = new HelloMoon();
System.out.println(moon.getHoleName());
HelloWorld is defined as
package world;
public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello World");
if the CLASSPATH is set : set CLASSPATH=.;C:\myclasses;
Once the CLASSPATH has been set (and compiled .java file); it can be called using the following from any path of directory:
java world.HelloWorld
java world.moon.HelloMoon
But it does not explain the details why it works this way. Also, if I want to run it without using "world" prefix to run HelloWorld, what do I need to set up?
also for the HelloMoon?
When I tried running those classes by going to an appropriate directory, I got the noClassDefFound (using command like "java HelloWorld" or java "HelloMoon").
Thanks in advance...

[Javapedia: Classpath|http://wiki.java.net/bin/view/Javapedia/ClassPath]
[How Classes are Found|http://java.sun.com/j2se/1.5.0/docs/tooldocs/findingclasses.html]
[Setting the class path (Windows)|http://java.sun.com/j2se/1.5.0/docs/tooldocs/windows/classpath.html]
[Setting the class path (Solaris/Linux)|http://java.sun.com/j2se/1.5.0/docs/tooldocs/solaris/classpath.html]
[Understanding the Java ClassLoader|http://www-106.ibm.com/developerworks/edu/j-dw-javaclass-i.html]
java -cp .;<any other directories or jars> YourClassNameYou get a NoClassDefFoundError message because the JVM (Java Virtual Machine) can't find your class. The way to remedy this is to ensure that your class is included in the classpath. The example assumes that you are in the same directory as the class you're trying to run.
javac -classpath .;<any additional jar files or directories> YourClassName.javaYou get a "cannot resolve symbol" message because the compiler can't find your class. The way to remedy this is to ensure that your class is included in the classpath. The example assumes that you are in the same directory as the class you're trying to run.

Setting up The CLASSPATH

I am trying to start my own package, however there was no classpath varable by default in the windows 2000 environment variables, I therefore created a user classpath variable and put the location of my package as a path, i have however had no success can anyone please offer me some help
Thanx

Here's some info on setting the classpath: http://java.sun.com/j2se/1.3/docs/tooldocs/win32/classpath.html
This is how you set the classpath in Windows 2000: right click My Computer, select Properties, select Advanced, Environment Variables. Click New to create a new variable. Enter CLASSPATH as the name of the variable and a list of directories separated by semi-colons as the value. Click, OK, OK.
Note: You must close and re-open your command prompt window after adding or modifying environment variables.
After re-opening the command prompt window type: echo %CLASSPATH% to see how your classpath is currently set.
About classpath and packages: Suppose your class in in package com.mycompany.mypackage and suppose your class files are in the directory C:\stuff\com\mycompany\mypackage. In that case you would have to set your classpath to C:\stuff (i.e., the base directory of your package).
If you get any error messages, please copy and paste them here.
Jesper

Error trying to run SSIS Package via SQL Server Agent: DTExec: Could not set \Package.Variables[User::VarObjectDataSet].Properties[Value] value to System.Object

Situation:
SSIS Package designed in SQL Server 2012 - SQL Server Data Tools
Windows 7 - 64 bit.
The package (32 bit) extracts data from a SQL Server db to an Excel Output file, via an OLE DB connection.
It uses 3 package variables:
*) SQLCommand (String) to specify the SQL Statement to be executed by the package
Property path: \Package.Variables[User::ExcelOutputFile].Properties[Value]
Value: f:\Output Data.xls
*) EXCELOutputFIle (String) to specify path and filename of the Excel output file
Property path: \Package.Variables[User::SQLCommand].Properties[Value]
Value: select * from CartOrder
*) VarObjectDataSet (Object) to hold the data returned by SQL Server)
Property path: \Package.Variables[User::VarObjectDataSet].Properties[Value]
Value: System.Object
It consists out of 2 components:
*) Execute SQL Task: executes the SQL Statement passed on via a package variable. The resultng rows are stored in the package variable VarObjectDataSet
*) Script Task: creates the physical output file and iterates VarObjectDataSet to populate the Excel file.
Outcome and issue:The package runs perfectly fine both in SQL Server Data Tools itself and in DTEXECUI.
However, whenever I run it via SQL Server Agent (with 32 bit runtime option set), it returns the errror message below.
This package contains 3 package variables but the error stating that a package variable can not be set, pops up for the VarObjectDataSet only. This makes me wonder if it is uberhaupt possible to set the value of a package variable
of type Object.
Can anybody help me on this please ?
Message
Executed as user: NT Service\SQLSERVERAGENT. Microsoft (R) SQL Server Execute Package Utility Version 11.0.2100.60 for 32-bit Copyright (C) Microsoft Corporation. All rights reserved. Started: 6:40:20 PM DTExec: Could
not set \Package.Variables[User::VarObjectDataSet].Properties[Value] value to System.Object. Started: 6:40:20 PM Finished: 6:40:21 PM Elapsed: 0.281 seconds. The package execution failed. The step failed.
Thank you very much in advance
Jurgen

Hi Visakh,
thank you for your reply.
So, judging by your reply, not all package variables used inside a package need to be set a value for when run in DTEXEC ?
I already tried that but my package ended up in error (something to do with "... invocation ...." and that error is anything but clearly documented. Judging by the error message itself, it looks like it could be just about anything. that is why I asked my
first question about the object type package variable.
Now, I will remove it from the 'set values' list and try another go cracking the unclear error-message " ... invocation ...". Does an error message about " ... invocation ..." ring any bells, now that we are talking about it here ?
Thx in advance
Jurgen
Yes exactly
You need to set values only forthem which needs to be controlled from outside the package
Any variable which gets its value through expression set inside package or through a query inside execute sql task/script task can be ignored from DTExec
Ok I've seen the invocation error mostly inside script task. This may be because some error inside script written in script task. If it appeared after you removed the variable then it may because some reference of variable existing within script task.
Please Mark This As Answer if it helps to solve the issue Visakh ---------------------------- http://visakhm.blogspot.com/ https://www.facebook.com/VmBlogs

Setting the runtime classpath

Hi
I have a beginner question regarding setting the java classpath.
When I run a java command, I usually do a java -cp <jarfiles> <exe>. However, in my case, I am including up to 30 jar files. I am currently specifically defining the classpath, but I would like to have a more dynamic way to set the classpath. Is there a way to point to the folder and do a java -cp <foldername>/*.jar <exe>? I also have another problem with my jarfile folder, some of the jars are stored in separate folders(foo/myjar.jar, and foo/foo2/myjar.jar). Is there a way to set the classpath so that all I have to do is point to the foo folder? Also, copying my jars to the java.ext.dirs is not an option, since I am not an administrator on the box.
Thanks.
Joe

I am getting this error when I try to run an install routine for an application that uses the JVM. I kept getting this error. Do you have any ideas. I am a newbie. I am running fedora, mozilla, and sun jsdk1.4.2_05.
Thanks
Mark Whitlock
[root@localhost rapidwiz]# /tmp/RapidInstall/jre/Linux/1.1.8/bin/../lib/i686/green_threads/libzip.so: symbol errno, version GLIBC_2.0 not defined in file libc.so.6 with link time reference (libzip.so)
Unable to initialize threads: cannot find class java/lang/Thread
Could not create Java VM

Setting multiple packages to Classpath

Hi Friends,
I want set to a directory to classpath which has multiple packages like D:\CED_Siebel_13092007\temp\cmwCallImplLib\org\apache\axis\client
D:\CED_Siebel_13092007\temp\cmwCallImplLib\com\bofa\crme\ccs\proxy
Means in directory path D:\CED_Siebel_13092007\temp\cmwCallImplLib
I have 1.)org.apche.axis.client(Listof classfiles)
2.)com.bofa.crme.ccs.proxy.(Listof classfiles)
How to make compiler recognise these classfiles?
Because I am weblogic server to deploya war file which is making a reference to these class files.
Though I need to have basic knowledge abt CLASSPATH,
Please Help me Friends,
Thanks in Advance...

"D:\CED_Siebel_13092007\temp\cmwCallImplLib"
This path should be part of your CLASSPATH.

Problem in the package or classpath

Hello every body
I want to add a module at "jhove" which is open source: http://hul.harvard.edu/jhove/index.html
When I launch jhove like this: ./jhove -k file.pdf, it shows me more informations about this pdf.
I want that it re-knows me anathor type of file.(warc format)
Then I have to write a new module.
I try to do it following the link: http://hul.harvard.edu/jhove/writingamodule.html
I added my java code in :/home/jhove/classes/edu/harvard/hul/ois/jhove/module/Project/
The compilation works well.
I add : EXTRA_JARS=/jhove/classes/edu/harvard/hul/ois/jhove/module/Project/WarcModule.jar
At the file: jhove.tmpl
I also add this code at jhove.conf like they montionned in document:
<module>
<class>WarcModule</class>
</module>
I also try with this solution:
<module>
<class>edu.harvard.hul.ois.jhove.module.Project.MonModule</class>
</module>
But I have this error:
edu.harvard.hul.ois.jhove.JhoveException: cannot instantiate module: WarcModule
at edu.harvard.hul.ois.jhove.JhoveBase.init(Unknown Source)
at Jhove.main(Unknown Source)
I think that is problem in the classpath.
There is my code:
package edu.harvard.hul.ois.jhove.module.Project;
import java.io.File;
import java.util.*;
import java.io.*;
import edu.harvard.hul.ois.jhove.*;
import edu.harvard.hul.ois.jhove.ModuleBase;
import edu.harvard.hul.ois.jhove.RepInfo;
import org.archive.io.warc.*;
public class MonModule extends ModuleBase
         private static final String NAME = "Warc-hul";
         private static final String RELEASE = "1.7";
         private static final int [] DATE = {2008, 9, 23};
         private static final String [] FORMAT = { "warc"};
         private static final String COVERAGE =
             "PDF 1.0-1.6; PDF/X-1 (ISO 15930-1:2001), X-1a (ISO 15930-4:2003), " +
          "X-2 (ISO 15930-5:2003), and X-3 (ISO 15930-6:2003); Tagged PDF; " +
          "Linearized PDF; PDF/A (ISO/CD 19005-1)";
         private static final String [] MIMETYPE = {"application/warc"};
         private static final String WELLFORMED = "A PDF file is " +
             "well-formed if it meets the criteria defined in Chapter " +
             "3 of the PDF Reference 1.6 (5th edition, 2004)";
         private static final String VALIDITY = null;
         private static final String REPINFO = null;
         private static final String NOTE = "This module does *not* validate " +
          "data within content streams (including operators) or encrypted data";
         private static final String RIGHTS = "Copyright 2003-2007 by JSTOR and " +
          "the President and Fellows of Harvard College. " +
          "Released under the GNU Lesser General Public License.";
         private static final String ENCRYPTED = "<May be encrypted>";
protected MonModule(String NAME, String RELEASE, int[] DATE, String[] FORMAT, String COVERAGE, String[] MIMETYPE, String WELLFORMED, String VALIDITY, String REPINFO, String NOTE, String RIGHTS, boolean x)
         super (NAME, RELEASE, DATE, FORMAT, COVERAGE, MIMETYPE, WELLFORMED,VALIDITY, REPINFO, NOTE, RIGHTS, true);
* PRIVATE INSTANCE FIELDS.
/* First 6 bytes of file */
protected byte _sig[];
/* Checksummer object */
protected Checksummer _ckSummer;
/* XMP property */
protected Property _xmpProp;
/* Input stream wrapper which handles checksums */
protected ChecksumInputStream _cstream;
/* Data input stream wrapped around _cstream */
protected DataInputStream _dstream;
/* Flag for presence of global color table */
protected boolean _globalColorTableFlag;
/* Size of global color table */
protected int _globalColorTableSize;
/* Count of graphic control extensions preceding
* something to modify */
protected int _gceCounter;
/* Top-level metadata property */
protected Property _metadata;
/* Blocks list property */
protected List _blocksList;
/* Total count of graphic and plain text extension blocks */
protected int _numGraphicBlocks;
public void checkSignatures (File file, InputStream stream, RepInfo info)
throws IOException
int sigBytes[] = { 'W', 'A', 'R', 'C'};
int i;
int ch;
try {
    _dstream = null;
    _dstream = getBufferedDataStream (stream, _je != null ?
                _je.getBufferSize () : 0);
    for (i = 0; i < 4; i++) {
        ch = readUnsignedByte(_dstream, this);
        if (ch != sigBytes) {
info.setWellFormed (false);
return;
info.setModule (this);
info.setFormat (_format[0]);
info.setMimeType (_mimeType[0]);
info.setSigMatch(_name);
catch (Exception e) {
// Reading a very short file may take us here.
info.setWellFormed (false);
return;
Please can any one help me.

Daniel, not sure if everything is clear now, but the way you are validating a WARC file is seriously flawed! I strongly suggest you use an existing WARC tool to do the actual parsing/validating.
I've seen more and more people on JHove's mailing list posting problems on how to create their own modules, so I decided to write a small how-to-write-your-own-module-guide.
Perhaps you'd like to give it a shot. I'll also post it on the mailing list.
================================================================================
This is a step-by-step tutorial that will enable you to compile and run a
custom made module for Harvard's idetification tool JHove [1]. This is not
a tutorial on Java programming! For a thorough explanation of this tool and
extensive documentation, please see:
[http://hul.harvard.edu/jhove/documentation.html]
================================================================================
= Setp 1 =
Download and unzip JHove 1.1f [2]. The unzipped folder will be called
JHOVE_HOME from now on.
================================================================================
= Step 2 =
In this example I will construct a very elementary ARC module and will be using
Heritrix' [3] ARCUtils class, so download Heritrix 1.14 [4] and unzip it. After
unzipping, locate the file 'heritrix-1.14.1.jar' (it might be a different
version) and place it in the directory 'JHOVE_HOME/bin'.
================================================================================
= Step 3 =
Create a folder 'JHOVE_HOME/bin/test' and create a new file in it called
'ArcModule.java'. Paste the following contents in that file:
package test;
import java.io.IOException;
import java.io.InputStream;
import edu.harvard.hul.ois.jhove.ModuleBase;
import edu.harvard.hul.ois.jhove.RepInfo;
import org.archive.io.arc.ARCUtils;
public class ArcModule extends ModuleBase {
    private static final String NAME = "ARC-hul";
    private static final String RELEASE = "0.1";
    private static final int[] DATE = {2008, 11, 11};
    private static final String[] FORMAT = {"ARC"};
    private static final String COVERAGE = null;
    private static final String[] MIMETYPE = {"application/arc"};
    private static final String WELLFORMED = "...";
    private static final String VALIDITY = null;
    private static final String REPINFO = "...";
    private static final String NOTE = null;
    private static final String RIGHTS = "GNU LGPL";
    public ArcModule() {
        super (NAME, RELEASE, DATE, FORMAT, COVERAGE, MIMETYPE, WELLFORMED,
                VALIDITY, REPINFO, NOTE, RIGHTS, false);
        // Optionally set some Agent information: see the other Modules how
        // this can be done.
    @Override
    public int parse(InputStream stream, RepInfo info, int parseIndex) {
        info.setModule(this);
        boolean wellFormed = false;
        try {
            if(ARCUtils.testCompressedARCStream(stream)) {
                wellFormed = true;
        } catch (IOException e) {
            e.printStackTrace();
        info.setWellFormed(wellFormed);
        return 0;
}================================================================================
= Step 4 =
Compile this ArcModule by opening a shell (command prompt) and cd-ing to
'JHOVE_HOME/bin' and executing the following command:
*nix & Mac OS:
javac -cp .:JhoveApp.jar:heritrix-1.14.1.jar test/ArcModule.javaWindows:
javac -cp .;JhoveApp.jar;heritrix-1.14.1.jar test\ArcModule.java
(Note, if you're using JDK 1.4, replace '-cp' with '-classpath')
You shouldn't get any messages if all goes well.
================================================================================
= Step 5 =
Open the file 'JHOVE_HOME/conf/jhove.conf' and add the following right beneath
the line <bufferSize>?????</bufferSize>, where ????? is a number:
<module>
<class>test.ArcModule</class>
</module>Save the file.
================================================================================
= Step 6 =
Create a folder called 'JHOVE_HOME/arcs' and copy two compressed ARC files in
them. If you don't have any compressed ARC files laying around, you can
download two small [5]. The file 'A.arc.gz' is a valid compressed ARC file,
while 'B.arc.gz' is the same as 'A.arc.gz' but I removed the ARC-header from
the latter, making it an invalid ARC file.
================================================================================
= Step 7 =
Open a shell, cd to 'JHOVE_HOME/bin' and execute the following command:
*nix & Mac OS:
java -cp .:JhoveApp.jar:heritrix-1.14.1.jar Jhove -c ../conf/jhove.conf -m ARC-hul ../arcsWindows:
java -cp .;JhoveApp.jar;heritrix-1.14.1.jar Jhove -c ..\conf\jhove.conf -m ARC-hul ..\arcsWhich will cause JHove to scan everything that is in 'JHOVE_HOME/arcs' folder
and throws it through your newly create ArcModule. The output will be as
follows:
Jhove (Rel. 1.1, 2008-02-21)
Date: 2008-11-14 22:29:51 CET
RepresentationInformation: .../jhove/arcs/A.arc.gz
ReportingModule: ARC-hul, Rel. 0.1 (2008-11-11)
LastModified: 2008-08-24 20:23:20 CEST
Size: 130870
Status: Well-Formed and valid
RepresentationInformation: .../jhove/arcs/B.arc.gz
ReportingModule: ARC-hul, Rel. 0.1 (2008-11-11)
LastModified: 2008-11-14 21:53:15 CET
Size: 116136
Status: Not well-formedWhich is the expected result: A is valid and B is not.
================================================================================
= Final remarks =
As I said, this is not a programming tutorial, nor is it the best way to
validate ARC files: more meta data should be extracted from the file. But I
leave that for you. This was only a guide to show you how to get started on
writing and running your own modules. You can have a look at the source
of the existing modules to see the "best practices" w.r.t. writing a module.
Best of luck!
Regards,
Bart.
================================================================================
= References =
[1] [http://hul.harvard.edu]
[2] [http://hul.harvard.edu/jhove/download.html]
[3] [http://crawler.archive.org]
[4] [http://sourceforge.net/project/showfiles.php?group_id=73833&package_id=73980]
[5] [http://iruimte.nl/arcs]

Adding packages and classpath

Hi there all,
Having finished by first Java application for work, I'm trying to create an executable jar file for it.
The current directory structure is: -
+---- programs
| |
| |---- GateKeeper
|
|---- commonfilesThe commonfiles directory contains the packages my program uses. I usually run the program via a batch file which is in the GateKeeper directory using: -
C:\j2sdk1.4.2_04\bin\java -classpath .;h:\Java\commonfiles\ojdbc14.jar;h:\Java GateKeeper
I have read the jar file tutorial and have created my jar file by using: -
jar cf GateKeeper.jar programs commonfiles
I'm now trying to set the Main-Class within the jar file. So I have tried this: -
jar cmf Main-Class: programs/GateKeeper/GateKeeper GateKeeper.jar
However, I keep getting this error: -
H:\Java\JarTemp>jar cmf Main-Class: programs\GateKeeper\GateKeeper GateKeeper.jar
java.io.FileNotFoundException: Main-Class: (The system cannot find the file spec
ified)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:106)
at java.io.FileInputStream.<init>(FileInputStream.java:66)
at sun.tools.jar.Main.run(Main.java:123)
at sun.tools.jar.Main.main(Main.java:904)
H:\Java\JarTemp>
This is my first time trying to deploy something that I've made, so a little patience wouldn't go amiss here. :) I also need to somehow add the commonfiles directory to the internal classpath of the jar file so that the application can find my packages (which used to happen by setting the classpath on execution).
Thanks for any help.

Heh.......this is turning into a bit of a running commentary. Perhaps I can sell the movie rights "Newbie: When Jars Go Bad". :)
Anyway.....onward.
Got the thing to execute (sort of) by just having commonfiles as a directory and the rest as seperate class files. I've got a text file containing the manifest (callded "manifest" now)
Main-Class: GateKeeper
Class-Path: commonfiles\ojdbc14.jar commonfiles .
I've created the Jar file using: -
jar cvmf manifest GateKeeper.jar commonfiles images GateKeeper.class GateKeeperFrame$1.class GateKeeperFrame$MainAction.class GateKeeperFrame$MainButtonListener.class GateKeeperFrame.class LoginFrame$DataSource.class LoginFrame.class UsersDataModel.class
...which is basically just a bunch of classes.
I can now execute the Jar file using "java -jar GateKeeper.jar".....all well and good. However, I now get this error.: -
Exception in thread "main" java.lang.NoSuchMethodError
at GateKeeper.main(GateKeeper.java:25)
...which, in my "main" method is this line: -
Point centreScreen = GraphicsEnvironment.getLocalGraphicsEnvironment().getCenterPoint();
Any particular reason that its barfing here? Remember I can run this application fine when its not jar'ed.

Packages to CLASSPATH's??

Is there a difference in adding a package to the CLASSPATH as opposed to simply adding folders etc.
I keep getting the "NoClassDefFoundError:lava/io/URLInputStream", even though both C:\lava and C:\lava\io are in my CLASSPATH
Any Ideas?
ahhfor

Hi. Since the package lava/io/URLInputStream is in C, try setting the classpath to just c:\
I don't think there's any difference in setting the classpath to point to folders or jar files, they work just the same.
Hope that helps.
Is there a difference in adding a package to the
CLASSPATH as opposed to simply adding folders etc.
I keep getting the
"NoClassDefFoundError:lava/io/URLInputStream", even
though both C:\lava and C:\lava\io are in my
CLASSPATH
Any Ideas?
ahhfor

Help with packages and classpath

Heya,
first off, i use textpad to compile my java, i don't do it via the command line.
my problem is faily simple, i think. i've got a main class and i'd like it to import a custom class from a subdir.
Main class is in
C:\Documents and Settings\David\Desktop\java\test_gen.java
I would like it to import
C:\Documents and Settings\David\Desktop\java\obj_data\objects.java
I understand that I have to declare objects.java to be a part of a package, so i head the code with: package obj_data; as i understand it, the directory in which the package to be imported resides in will be named the same as the package.
When i import my package into test_gen.java, i import obj_data as follows:
import obj_data.*;
this should import objects.class and any other classes in the same directory. also import obj_data.objects.*; could be used.
Anyway, thats my understanding of how you set up the class and package; i also understand that when the java file compiles the compiler looks at the directoy(s) indicated in the class path for the classes to import. that in mind i tried to add:
C:\Documents and Settings\David\Desktop\java\obj_data\
to my classpath. i did this via dos, javac -classpath "C:\Documents and Settings\David\Desktop\java\obj_data\"
i got no error messages, so i assume it worked. however when i try to compile the main java (test_gen) i get-
package packages does not exist
import packages.*;
^
1 error
Tool completed with exit code 1
can anyone give me some help please?

This is a minimal explanation of packages.
Assume that your programs are part of a package named myapp, which is specified by this first line in each source file:
package myapp;
Also assume that directory (C:\java\work\) is listed in the CLASSPATH list of directories.
Also assume that all your source files reside in this directory structure: C:\java\work\myapp\
Then a statement to compile your source file named aProgram.java is:
C:\java\work\>javac myapp\aProgram.java
Explanation:
Compiling
A class is in a package if there is a package statement at the top of the class.
The source file needs to be in a subdirectory structure. The subdirectory structure must match the package statement. The top subdirectory must be in the classpath directory.
So, you generate a directory structure C:\java\work\myapp\ which is the [classpath directory + the package subdirectory structure], and place aProgram.java in it.
Then from the classpath directory (C:\java\work\) use the command: javac myapp\aProgram.java
Running
Compiling creates a file, aProgram.class in the myapp directory.
(The following is where people tend to get lost.)
The correct name now, as far as java is concerned, is the combination of package name and class name: myapp.aProgram (note I omit the .class) If you don't use this name, java will complain that it can't find the class.
To run a class that's NOT part of a package, you use the command: java SomeFile (assuming that SomeFile.class is in a directory that's listed in the classpath)
To run a class that IS part of a package, you use the command java myapp.aProgram (Note that this is analogous to the command for a class not in a package, you just use the fully qualified name)

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.

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

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

Need you help !!! -- How to set PACKAGE SIZE in CURSOR?

Dear experts:
Does anybody know how to set the package size if you use cursor in your abap program?
My scenario is to select all the data from MARA table in which the data volumn is very big, and then process for some specific logic. When I try to select them into one internal table or use CURSOR without package, my abap program will abort after running for around 1 hour. So I was thinking if I can use cursor and set the PACKAGE SIZE like 10,000 and process the data by batch.
Here is my sample code:
OPEN CURSOR: CUR_MARA_TBL FOR
SELECT * FROM MARA.
DO.
FETCH NEXT CURSOR CUR_MARA_TBL INTO CORRESPONDING FIELDS OF WA_MARA_TBL.
IF sy-subrc = 0.
......Detail logic......
ENDIF.
ENDDO.
I would appreciate if anybody can let me know how to set the package size based on the sample code above, or any webpage/article about that.
Any reply would be appreciated and thank you all in advance!
Best Regards.
Tim
Moderator message: please study F1 help for FETCH statement.
locked by: Thomas Zloch on Sep 8, 2010 4:10 PM

The Spark List's layout property has the requestedRowCount and requestedMinRowCount properties.
You can either set a new layout property on your List like this:
<s:List>
        <s:layout>
            <s:VerticalLayout requestedMinRowCount="1" />
        </s:layout>
    </s:List>
or reskin the List and modify the VerticalLayout in your copy of ListSkin.
Jason

Set package in classpath?

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