Creating packages... 2

[cadbilbao]

If I insert into my code (mycode.java):

package myfirm.foo.project

I get the error:

Exception in thread "main" java.lang.NoClassDefFoundError: mycode/myfirm.

Wich is the way to create packages????

 

[meadandale]

Ok, so you create a file MyCode.java:

package myfirm.foo.project;

public class MyCode {
...
}

First of all, this file needs to be placed in a folder called project, which is in a folder called foo, which is in a folder called myfirm.

when you try to execute this class you need to have the root directory (myfirm) in the class path and you would say:

java myfirm.foo.project.MyCode

to execute it.

Hope this helps. Packages were very confusing for me at first.

Charles

 

[cadbilbao]

I inserted 'package myfirm.foo.project' into 'mycode.java'

I created 'myfirm' folder; 'foo' folder; 'project' folder, and placed 'mycode.java' on it.

I added __/myfirm to my CLASSPATH

But when execute 'java myfirm.foo.project.mycode', I get the same error...

 

[cadbilbao]

Now, the error is:

Exception in thread "main" java.lang.NoClassDefFoundError: myfirm/foo/project/mycode

 

[meadandale]

Nowhere do you say that you actually compiled the file. Placing mycode.java in the folder is insufficient. You need to compile it so that mycode.class is in the myfirm/foo/project folder.

 

[cadbilbao]

Yes. I do compile mycode.java, and I do place mycode.class
into 'myfirm/foo/project'.

But if I execute 'java myfirm.foo.project.mycode', I get:

Exception in thread "main" java.lang.NoClassDefFoundError: myfirm/foo/project/mycode

 

[wushutwist]

Sounds like a CLASSPATH issue. What directory are you running the java command from? Regardless, make sure you add the myfirm directory to your CLASSPATH. Also add . (current directory) to your CLASSPATH if it isn't already.
Wushutwist

 

[LittleWing]

don't add the myfirm folder to your class path, you have to add the folder above it i.e. if your code is looking for myfirm and it is in the folder

c:\myproject\src\classfiles\myfirm

you have to add the following to your classpath

c:\myproject\src\classfiles

the jvm will look under this folder for the first entry in your package name i.e. myfirm. so, as you can see, if you add

c:\myproject\src\classfiles\myfirm

to your classpath, it wont find myfirm because its already there...see!!! X-)

 

[wushutwist]

Sorry my mistake, LittleWing is right.
Wushutwist