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help!!!!!!!

4 replies on 1 page. Most recent reply: Oct 14, 2002 4:26 PM by ravikumar

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ravikumar

Posts: 10
Nickname: ji
Registered: Oct, 2002

help!!!!!!!

Posted: Oct 14, 2002 10:06 AM

hi,
i am just learning java and i have a problem. I have 3 files, A.java and B.java and C.java I need to use A and B java file variables in C.java So i wrote package statements like this. all the files are in the "waves" directory.
//in A.java
package waves;
import java.awt.*;
public class A{...
....}
//in B.java
package waves;
public class B{..
...}
// in C.java
package waves;
import java.awt.*;
public class C{....
........}
when i run, i am getting error message as "Exception in thread "main" java.lang.NoClassDefFoundError: B"

i am using linux machine....please help!!!
ji

Don Hill

Posts: 70
Nickname: ssswdon
Registered: Jul, 2002

Re: help!!!!!!!

Posted: Oct 14, 2002 10:39 AM

What type of sandbox are you playing in ?

ravikumar

Posts: 10
Nickname: ji
Registered: Oct, 2002

Re: help!!!!!!!

Posted: Oct 14, 2002 11:00 AM

was anything wrong in my question?

Kishori Sharan

Posts: 211
Nickname: kishori
Registered: Feb, 2002

Re: help!!!!!!!

Posted: Oct 14, 2002 12:02 PM

To run the class B you need to write as:

java waves.B

I think you may be writing
java B

when you run a class you need to specify fully-qualified name of your class and not just the simple name. Here, B is simple name and waves.B is fully-qualified name. Again, you also need to set the classpath. Since your package is waves, the parent folder of waves folder should be in classpath. Suppose your waves folder is as:
c:\ravi\waves
Then you need to include c:\ravi in classpath. Alternatively, you can specify classpath when you run the class as:
java -classpath c:\ravi waves.B

Thanks
Kishori

ravikumar

Posts: 10
Nickname: ji
Registered: Oct, 2002

Re: help!!!!!!!

Posted: Oct 14, 2002 4:26 PM

hi ,
thanks for your help...i couldnot run it though i made the changes...actually i need to write a java program in which, if i click on one applet window (say, w1), there is another applet window (say, w2) which gets activated and shows some graph basing on some values from w1 . So i thought that i need to send some values from w1 to w2..hence i created this package thing...is there a simple way or is there anything wrong with my logic?
thanks very much again..

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