Solved

working with packages

Posted on 1998-04-27
2
135 Views
Last Modified: 2010-04-16
In my Java-application I want to use packages because I have about 78 classes.
I want to devide them into 1 main package and 3 subpackages :
main : "ipstool" (which contains only the class with the main-method)
sub : "data", "exceptions" and "interface".
In every class of a certain package (all in one directory with the same name as the package..) I put
     package data;
in front of the import-statements.
Also I put there the other packages of my application, f.e. :
    import ipstool.exceptions.*;
    import java.awt.*;
I'm compiling from the directory that contains the "ipstool"-directory.

This doesn't compile however...
What am I doing wrong? Should I put something in the classpath or is it not necessary to import them as ipstool.exceptions.* but as exceptions.* or maybe something else ?
0
Comment
Question by:Jeppe041198
2 Comments
 

Author Comment

by:Jeppe041198
ID: 1219970
Edited text of question
0
 
LVL 16

Accepted Solution

by:
imladris earned 50 total points
ID: 1219971
From your description of the hierarchy, the "main" class would have to be in a subdirectory named ipstool, and the others in subdirectories below that. Or, to put it another way, if your classpath in effect is pointing to directory ipstool, you need to reorganize to have it point to one directory higher (ipstools parent), i.e. compile from the parent directory.

On the other hand, I have found that some Java environments (e.g. J++) are unhappy with Java programs that don't have a default package. The solution I would recommend is to make your "main" class be the default package, and the other three be package data, exceptions etc., in directories below.

0

Featured Post

Active Directory Webinar

We all know we need to protect and secure our privileges, but where to start? Join Experts Exchange and ManageEngine on Tuesday, April 11, 2017 10:00 AM PDT to learn how to track and secure privileged users in Active Directory.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Protect jar file - windows app 2 65
custom annotations 9 42
throw exception 21 58
pagenation logic how it is working in my code 1 54
Java had always been an easily readable and understandable language.  Some relatively recent changes in the language seem to be changing this pretty fast, and anyone that had not seen any Java code for the last 5 years will possibly have issues unde…
This was posted to the Netbeans forum a Feb, 2010 and I also sent it to Verisign. Who didn't help much in my struggles to get my application signed. ------------------------- Start The idea here is to target your cell phones with the correct…
Viewers learn about the scanner class in this video and are introduced to receiving user input for their programs. Additionally, objects, conditional statements, and loops are used to help reinforce the concepts. Introduce Scanner class: Importing…
This tutorial explains how to use the VisualVM tool for the Java platform application. This video goes into detail on the Threads, Sampler, and Profiler tabs.

829 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question