About Threadpool Class and it's use in JAVA

Dear all,
I have searched on the Connection Pooling and Thread Pooling on web but it does not give me
Proper solution about Thread Pooling. Thread pooling is very useful in assigning the dynamic Thread for same instance of class. But I didn't got the source code of Thread Pooling in java.
So I decided to implement Thread Pool Class in java. I thing u don't do this code again and again.
If any one wants code for Thread pooling or .jar of thread pool then please mail me. I would
like to help for Threadpool in JAVA.
Thanks,
Satish Shelake