Re: compile error - basic package issue

From:
"Silvio" <silvio@nospam.com>
Newsgroups:
comp.lang.java.programmer
Date:
Sat, 16 Jan 2010 12:06:07 +0100
Message-ID:
<4b519da3$0$22945$e4fe514c@news.xs4all.nl>
"tom" <badouglas@gmail.com> wrote in message
news:c1fdac4e-7d25-47ed-8c8b-b7b6e5481a98@j19g2000yqk.googlegroups.com...

Hi.

New to java, and trying to create a test app that imports another test
package.

The test apps are listed, as is the compile cmd and the err..

The files are all in the same dir. I was able to compile the
MyIncorrectnessListener.java, and the MycssErrorHandler.java with no
warnings/errs.

Any pointers/comments are appreciated...

thanks

the compile cmd/err
[root@toshiba parseapp2]# javac -Xlint -classpath '/opt/htmlunit/lib/
*:/parseapp2/' sjsu_classes.java
sjsu_classes.java:33: '.' expected
import MyIncorrectnessListener;
                             ^
sjsu_classes.java:33: ';' expected
import MyIncorrectnessListener;
                              ^
sjsu_classes.java:34: class, interface, or enum expected
import MycssErrorHandler;
      ^
3 errors
3 warnings
[

/*
// sjsu_classes.java
//
// function handles getting the data from the sjsu course page, and
returns the course page/list
// for the given Alphabet letter. - handles ane letter at a time..
// -the page is then returned to the calling routinne
//
// input:
// args[0] - start url
// args[1] - term
// args[2] - dept
//
// return:
// course page for the term/dept
//
*/
import java.io.IOException;
import java.net.URL;
import java.util.List;
import java.util.Set;

import org.apache.commons.httpclient.NameValuePair;

import com.gargoylesoftware.htmlunit.*;
import com.gargoylesoftware.htmlunit.html.*;
import org.w3c.css.sac.ErrorHandler;
import org.xml.sax.SAXParseException;

//==my test packages
import MyIncorrectnessListener;
import MycssErrorHandler.*;

public class sjsu_classes {

//public static void main(String[] args) throws Exception {
public void main(String[] args) throws Exception {

// Create and initialize WebClient object
   WebClient webClient = new WebClient(BrowserVersion.FIREFOX_3);

IncorrectnessListener ilisten = new MyIncorrectnessListener();
ErrorHandler ierr = new MycssErrorHandler();
webClient.setIncorrectnessListener(ilisten);
webClient.setCssErrorHandler(ierr);
   webClient.setThrowExceptionOnScriptError(false);
   webClient.setRefreshHandler(new RefreshHandler() {
public void handleRefresh(Page page, URL url, int arg) throws
IOException {
//System.out.println("handleRefresh");
}

  });

// visit the page, get the form, get the btn
String url_tmp;
String url;
String Term;
String Dept;
String tmp1;
String tmp2;

url_tmp="?
FolderPath=PORTAL_ROOT_OBJECT.PA_HC_CLASS_SEARCH&amp;PortalActualURL=https
%3a%2f%2fcmshr.sjsu.edu%2fpsc%2fHSJPRDF%2fEMPLOYEE%2fHSJPRD%2fc
%2fCOMMUNITY_ACCESS.CLASS_SEARCH.GBL&amp;PortalRegistryName=EMPLOYEE&amp;PortalServletURI=https
%3a%2f%2fcmshr.sjsu.edu%2fpsp%2fHSJPRDF%2f&amp;PortalURI=https%3a%2f
%2fcmshr.sjsu.edu%2fpsc%2fHSJPRDF
%2f&amp;PortalHostNode=HRMS&amp;NoCrumbs=yes";

System.exit(0);
}
}

MyIncorrectnessListener test package
--------------------------------------------
/*
// MyIncorrectnessListener.java
//
// function handles getting the data from the sjsu course page, and
returns the course page/list
// for the given Alphabet letter. - handles ane letter at a time..
// -the page is then returned to the calling routinne
//
// input:
// args[0] - start url
// args[1] - term
// args[2] - dept
//
// return:
// course page for the term/dept
//
*/
//==handle the warnings thrown from the js functions..

package MyIncorrectnessListener;

import com.gargoylesoftware.htmlunit.*;
import com.gargoylesoftware.htmlunit.html.*;

//public static class MyIncorrectnessListener implements
IncorrectnessListener
public class MyIncorrectnessListener implements IncorrectnessListener
{
 @Override
 public void notify(String arg0, Object arg1)
 {
   //System.err.println("Argument : " + arg0.toString() + ", Object :
");
 }
}

MycssErrorHandler test package
--------------------------------
/*
// MycssErrorHandler.java
//
// function handles getting the data from the sjsu course page, and
returns the course page/list
// for the given Alphabet letter. - handles ane letter at a time..
// -the page is then returned to the calling routinne
//
// input:
// args[0] - start url
// args[1] - term
// args[2] - dept
//
// return:
// course page for the term/dept
//
*/
package MycssErrorHandler;

import org.w3c.css.sac.ErrorHandler;
import org.xml.sax.SAXParseException;
import com.gargoylesoftware.htmlunit.*;
import com.gargoylesoftware.htmlunit.html.*;

//==handle the warnings thrown from the js functions..
//==handle the warnings thrown from the css functions..
// public static class MycssErrorHandler implements
DefaultCssErrorHandler
// public static class MycssErrorHandler implements ErrorHandler
// public class MycssErrorHandler implements ErrorHandler
public abstract class MycssErrorHandler implements ErrorHandler
// protected class MycssErrorHandler implements ErrorHandler
{
  //@Override
  public void notify(String arg0, Object arg1)
  {
    //System.err.println("Argument : " + arg0.toString() + ",
Object : ");
  }
  //@Override
public void fatalError(SAXParseException ex)
{
//fatals.add(ex);
}

}


You should ALWAYS put your classes in a package. That means that each Java
source must start with a line like

package my.package.name.domain.com;

Additionally, you must then put the Java source in a directory
my/package/name/domain/com/ relative to the root directory of all the Java
sources in your project (most IDEs will allow you to have multiple root
directories in a project but let's not complicate things here).

This way your source directory content will mirror your package hierarchy.
Java classes that are in the same package/directory do not need to be
imported to refer to each other but when they are in different
packages/directories then they can only "see" each other either by fully
qualified name, like my.package.name.domain.com.SomeClass or by using
imports.

A final remark: you must run javac from the root of your source tree.

Gr. Silvio
 

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