Setting up JBuilder6 - new to Java

[gartsports]

Hi all,

I hope someone can help me...I'm new to Java and I downloaded the JBuilder6 personal edition. I've also created a directory to copy in the source examples from the Deitel book. I created the directory c:\jhtp\com\deitel\ and copied the source in there, because I noticed in the book that it uses packages such as "com.deitel.ch02.*;". If I understand it correctly, the package is just a path to a directory under your working directory, right?
Well, after I copied the examples I was able to go into JBuilder, select add package, and select "com.deitel". Now, I'm able to drill down into the individual chapters, exercises, to the source code.
Then I went into the project properties and tried to setup the paths for the project. I set them up as follows:

Source path: c:/jhtp
Test path: c:/jhtp/test
Output path: C:/jhtp/classes
Working directory: C:/jhtp
Required libraries: <none>

Then I added the main class I wanted to try and run:
com.deitel.ch02.Fig02_01.Welcome1

The classpath is as follows:

SET CLASSPATH= .;C:\jdk1.3\bin;c:\jhtp;c:\jhtp\com

When I tried to run it I got the following error message:
java.lang.NoClassDefFoundError: com/deitel/ch02/Fig02_01/Welcome1

Exception in thread &quot;main&quot;

I sure hope that someone can help me figure out what I'm doing wrong. I want to setup 8 PC's so that a bunch of us can work through the book together. Thank you in advance for any assistance!

Chris

 

[wushutwist]

Are you running from JBuilder? Did you compile first? Did it compile fine? Did you check C:/jhtp/classes to make sure the class files are being created?

If you are running from the command line then you will also need to put C:/jhtp/classes on the CLASSPATH.

 

[gartsports]

Thanks for your quick response. To answer your question, yes, I am running in JBuilder. I have the compile before running checked, but it doesn't appear to be compiling because there is nothing in the classes directory. I read another thread and figured out that I had to add c:\jhtp\classes to the classpath, but that didn't help either.

 

[wushutwist]

Go ahead do a compile from JBuilder and see what errors it is throwing.

 

[gartsports]

By compile, I assume you mean &quot;rebuild&quot;, right? I didn't see an actual &quot;compile&quot; option. Anyway, I did this and got this message:

&quot;Welcome1.java&quot;: Error #: 901 : package . stated in source C:\jhtp\src\com\deitel\ch02\Fig02_01\Welcome1.java does not match directory com.deitel.ch02.Fig02_01

I'm a little confused now, because this source doesn't even reference a package. It's the typical &quot;welcome&quot; program.


public class Welcome1 {
public static void main( String args[] )
{
System.out.println( &quot;Welcome to Java Programming!&quot; );
}
}

The error didn't make any sense, because the paths look the same! Any ideas?

Thanks again!

Chris

 

[gartsports]

I did it!!! I got my program to work!!! I'm not exactly sure how or why but it now works!! ;-)

The class I wanted to run was in the package com.deitel.ch02.Fig02_01, but it didn't have a &quot;package&quot; stmt in the source. The class name was &quot;Welcome1&quot;. When I added the line, &quot;package com.deitel.ch02.Fig02_01;&quot; it compiled and ran. So, what I'm assuming is that, since the source did not have the package stmt, it only looked at the source path I had defined in the project, which is c:/jhtp/src&quot;, right? In adding the package stmt to the Welcome1 source, it associated that source with the package (directory path) com.deitel.ch02.Fig02_01 and now could find the source in c:/jhtp/src/com/deitel/ch02/Fig02_01.Welcome1.java. Is this right or am I totally confused?? The later would surprise me!!!! ha ha. Thanks for the help!!!

Chris