Solved

NetBeans & Classpath issue

Posted on 2004-10-20
11
595 Views
Last Modified: 2013-11-23
Hello everyone, quick question concerning NetBeans and my classpath settings.

For my development machine, I have the following setup:  

Classpath = D:\classpath
JAVA_HOME = c:\j2skd1.4.2_05\bin

Now, I archive all java jars into a seperate folder just for archival purposes and I keep only those jars which I'm either currently using or use frequently in my classpath.  In NetBeans, if I import from a library, it will sometimes show that it does not exist...although the proper jar file is in the classpath. I have even gone as far as unzipping the jar file and then building the directory structure itself within the classpath just to ensure that it is there.  Now, if I mount the jarfile within NetBeans, then the code will compile as NetBeans is able to find the proper import files.

I'm really at a loss as why this is....I'm sure it must be a stupid mistake on my part.

Thanks,
David
0
Comment
Question by:lomidien
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
11 Comments
 
LVL 37

Accepted Solution

by:
zzynx earned 250 total points
ID: 12358947
>> if I import from a library, it will sometimes show that it does not exist
In netBeans the corresponding jar must be mounted
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 12358953
There's a contradiction here - you talk about jars, yet there are none in your classpath. A classpath involving jars must put the full path to the jar file
0
 
LVL 37

Expert Comment

by:zzynx
ID: 12358961
>> ...although the proper jar file is in the classpath.
netBeans doesn't use that one, only the mounted jar's
(That's my experience)
0
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 37

Expert Comment

by:zzynx
ID: 12359002
I quote:

Mounting filesystems not only defines the contents of a project, it also defines the Java classpath for the project. Unlike in command-line development, the IDE ignores the CLASSPATH variable on your system and builds a unique internal classpath for each of your projects. This classpath is made up of all the mounted filesystems, including hidden filesystems and filesystems that are mounted by default by the IDE.
0
 
LVL 37

Expert Comment

by:zzynx
ID: 12359021
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 12359036
There are two parts to this:

1. Java won't use jars in the classpath unless the full path is used
2. No IDE that i know of will use a jar unless it's explictly added via the GUI. Sometimes is you put it in the ext directory it will pick it up anyway
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 12359042
>>Sometimes is

=
Sometimes if
0
 

Author Comment

by:lomidien
ID: 12359199
Thanks all.  Yeah, it has been my experience that they must be mounted....I just didn't think that it was necessarily so.  I thought perhaps I had a setting wrong or something else, but if they must be mounted, they must be mounted.

Thanks,
David
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 12359251
They don't probably don't *have* to be mounted if you follow what i said earlier
0
 
LVL 37

Expert Comment

by:zzynx
ID: 12359252
Thanks for accepting.
0
 
LVL 12

Expert Comment

by:Giant2
ID: 12359281
> I archive all java jars into a seperate folder just for archival purposes and I keep only those jars which I'm either currently using or use frequently in my classpath.  In NetBeans, if I import from a library...

If you want to use jar you must mount this external jar.
Are you sure the jar is accessible from NetBeans (not exist some constraint, permission,etc. on te filesystem)?
If you declare the classpath out of the IDE, normally it's ignored.
If you have even now the problem, see the project properties. Maybe you have specified something in the classpath prop.

Bye, Giant.
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

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

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…
In this post we will learn how to connect and configure Android Device (Smartphone etc.) with Android Studio. After that we will run a simple Hello World Program.
Viewers learn about the “for” loop and how it works in Java. By comparing it to the while loop learned before, viewers can make the transition easily. You will learn about the formatting of the for loop as we write a program that prints even numbers…
This tutorial covers a practical example of lazy loading technique and early loading technique in a Singleton Design Pattern.

740 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