Implementing java delegates

[anoopmonish]

       I have created a class inside src/java/com/activiti/custom/UserId.java folder of 'activiti-app' . To call it inside the 'service task' I'v given class package as 'com.activiti.custom.Userid'. This class is not being called when running my process. Gives error 'class not found'. Please advice.
At which location should a delegate class be saved. What other configurations are required to link it to the running process.?

Thanks.

[anoopmonish]

Just found in the documentation. It works when the class is saved in com/activiti/extensions/bean.

Thanks,