Why is the jar file size increasing when I run the application?

Question

I'm developing a mobile application using j2me. In my mobile app I connect with another device through bluetooth and perform some operations.

In my mobile application the jar file size is 80KB

I deploy the application in "Nokia c2-00" mobile. When I execute the application the memory of the jar file increases every time. Each time I execute the application the jar file size increases by 5 to 10 KB.

For example I deploy the application in nokia phone (At that time the jar size is 80KB on the mobile) and after running and exiting the application I check the size (it will become 85 KB, after that it increases to 90KB, etc) the size is increased.

I cannot understand why my app size is increased. Please help me figure out why the jar file is increasing in size and how to stop it from doing that.