Path: csiph.com!x330-a1.tempe.blueboxinc.net!newsfeed.hal-mli.net!feeder3.hal-mli.net!newsfeed.hal-mli.net!feeder1.hal-mli.net!nx02.iad01.newshosting.com!newshosting.com!69.16.185.16.MISMATCH!npeer02.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail
From: Lew <lewbloch@gmail.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: Unable to use package...why ???
Date: Thu, 27 Oct 2011 07:33:49 -0700 (PDT)
Organization: http://groups.google.com
Lines: 78
Message-ID: <7180194.1172.1319726029502.JavaMail.geo-discussion-forums@prib32>
References: <280344ac-b398-44b3-b775-e84859feb5f0@gy7g2000vbb.googlegroups.com>
Reply-To: comp.lang.java.programmer@googlegroups.com
NNTP-Posting-Host: 216.239.45.130
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
X-Trace: posting.google.com 1319726029 14661 127.0.0.1 (27 Oct 2011 14:33:49 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Thu, 27 Oct 2011 14:33:49 +0000 (UTC)
In-Reply-To: <280344ac-b398-44b3-b775-e84859feb5f0@gy7g2000vbb.googlegroups.com>
Complaints-To: groups-abuse@google.com
Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=216.239.45.130; posting-account=CP-lKQoAAAAGtB5diOuGlDQk0jIwmH0T
User-Agent: G2/1.0
X-Google-Web-Client: true
Xref: x330-a1.tempe.blueboxinc.net comp.lang.java.programmer:9247

PortisHead wrote:
> First I created the file : Getbcard.java
> inside the directory : C:\myclasses\exam\test\dok
> below is the script :
> package exam.test.dok;

"myclasses" is the root of the classpath for this class.  Directories that match up with packages descend from such a root.

> public class Getbcard
> {
> public void setname()
> {
> System.out.println("Hello");
> }
> }
> 
> then , I compiled it using this command line:
> javac Getbcard.java

From what directory?  Where is your "exam/test/dok/" directory path?  ("exam\test\dok" in Windows.)

> and got the appropriated .class file:
> Getbcard.class

In what directory?

> Next , I created a new file , named : Showbcard.java in folder : C:
> \examples

That sounds like a class with no package.  Do not mix classes in packages with classes in the "no-package" (the default package, which isn't really a package).

<http://download.oracle.com/javase/tutorial/java/concepts/package.html>

Packages have to match with directories, in the normal filesystem approach.  If they do not, you are fubared.

> below is the script :

Not a script.

> import exam.test.dok.*;
> public class Showbcard
> {
> public static void main(String[] args)
> {
> System.out.println("Showbcard");
> Getbcard i = new Getbcard();
> i.setname();
> }
> }
> 
> 
> then , I compiled it using this command line:
> javac -cp c:\myclasses Showbcard.java
> and got the appropriated .class file:
> Showbcard.class

In what directory?

> Now when I try to execute the file like :
> java -cp c:\myclasses Showbcard
> 
> I get the error : Could not find or load main class Showbcard
> 
> What am I doing wrong here ?

As mentioned upthread, you left out the package in the class for the "java" command.

<http://download.oracle.com/javase/tutorial/java/package/index.html>
<http://download.oracle.com/javase/tutorial/java/package/managingfiles.html>

Note:  Do not use the CLASSPATH variable.  Stick with the "-jar" or "-cp" options to set classpath.

<http://download.oracle.com/javase/7/docs/technotes/tools/index.html>
<http://download.oracle.com/javase/7/docs/technotes/tools/windows/javac.html>
<http://download.oracle.com/javase/7/docs/technotes/tools/windows/java.html>

-- 
Lew