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basic packages question

John Rumassin
Greenhorn

Joined: Apr 13, 2007
Posts: 4
i have 2 files, in two separate folders.

\myPackage\test.java
\myPackage2\test2.java

//test.java
package myPackage;

public class test {
public test()
{}
}

//test2.java
package myPackage2;

import myPackage.test;

public class test2
{
public static void main (String[] args)
{
System.out.println("hello");
}
}

i can compile test.java. when i try and compile test2.java it says "package myPackage does not exist". the error code then follows with the statement "import myPackage.test".

i only have one classpath which is "."

on another computer it works fine and on mine it doesn't! help, please!

this is a simplistic example and i know you can do classpath ".." but i want it work without this as it is not necessary on another machine (and in my complicated . my machine is windows 2000 with 1.5.11 and the machine it works on is xp with 1.6.0
fred rosenberger
lowercase baba
Bartender

Joined: Oct 02, 2003
Posts: 11575
    
  17

"java beginner"

Please go back and read our Naming Policy. At the bottom of that page, you will find a link to change your display name. This is one of the two policies here that is strictly enforced - the other being "Be Nice".

Once you have done that, i'm sure someone will be glad to help you with your problems.
[ April 13, 2007: Message edited by: Fred Rosenberger ]

There are only two hard things in computer science: cache invalidation, naming things, and off-by-one errors
John Rumassin
Greenhorn

Joined: Apr 13, 2007
Posts: 4
sorry. i changed my name will apply by the rules. john
Srikanth Ramu
Ranch Hand

Joined: Feb 20, 2007
Posts: 76
While compiling your test.java use below command:

javac -d . test.java

you will find myPackage\test.class file created.

Now compile your test2.java as

javac -d . test2.java

you will find myPackage2\test2.class file created.

Hope this helps
John Rumassin
Greenhorn

Joined: Apr 13, 2007
Posts: 4
thank you for the response. i will give it a try. i thought -d was for system properties? is this something with windows 2000 vs xp? why wouldn't i need the -d on one computer but i would need it on another? thanks in advance, john
Joanne Neal
Rancher

Joined: Aug 05, 2005
Posts: 3742
    
  16
The -d option specifies where the class files should be created. It has nothing to do with your problem.
What directory are you in when you compile test2.java ?
If you only have "." in your classpath, then you need to be in the directory that the myPackage directory is a sub-directory of. If you are in the mypackage2 directory, then you need to specify that parent directory in your classpath.
e.g. if myPackage is a sub-directory of source, use the command line
javac -cp source myPackage2\test2.java

[ April 13, 2007: Message edited by: Joanne Neal ]
[ April 13, 2007: Message edited by: Joanne Neal ]

Joanne
John Rumassin
Greenhorn

Joined: Apr 13, 2007
Posts: 4
thank you for the reply. i know that i can add -cp ".." and it will recognize the above directory and compile. but this is not necessary on one machine and it is necessary on the other. i have checked the environmental variables and found that the only directory is ".". i am wondering if it is not a classpath issue? the code above is all the code. if you have the following file structure, please try it:

c:\myPackage
c:\myPackage2

compile both files (without the use of defining the classpath). thanks to all for the help, John
Stan James
(instanceof Sidekick)
Ranch Hand

Joined: Jan 29, 2003
Posts: 8791
See if THIS describes your situation ... under Using Packages.


A good question is never answered. It is not a bolt to be tightened into place but a seed to be planted and to bear more seed toward the hope of greening the landscape of the idea. John Ciardi
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: basic packages question