raw disk sector read and write in java

hey guys can anyone tell me is it possible to raw read and write disk sectors by java.......

No, not directly. In principle you could get Java to talk to the OS or some external program to do it via JNI (Java Native Interface), but Java isn't the tool of choice for OS or hardware-specific work.

If the only tool you have is a hammer, you tend to see every problem as a nail...
A. Maslow