Exception in thread "main" java.lang.NoClassDefFoundError:

Hi All,

I got this error

Exception in thread "main" java.lang.NoClassDefFoundError:

so i think its better for me showing my project struture to u pepole .

am Having my project in D:workspace>

D:\workspace>
com.repository.watchdog
!
!---------bin
! !
! !-com/repository/watchdog/*.class
!
!
!
!---------src
! !--com/repository/watchdog/*.java
!
!
!---------lib
! !-servlet.jar
! !-jdbc-odbc.jar
! !-mail.jar
! !-activation.jar
!
!
!---------mailread.properties
!---------mailserver.properties
!--------mail-serverdown.properties


so above is my project struture and am having my jdk in this path

path=C:\Program Files\Java\jdk\bin;

Now can anyone please tell me how to create a jar file for my project
expain me how to create manifeast file for my project
and to execute that jar file .


Please give me idea using my project struture...
I have tried in many ways but no use..


Thanks in advance


Thanks,
Prakash