CallableStatement object is used to call the stored
procedure and stored procedure is nothing but it's block of
code and it's identified unique name

ex

CallableStatement cs=con.prepareCall();
cs.executeUpdate(Call"{procedure name}");


con is a Connection object
It has three parameter

IN
OUT
INOUT

IN parameter used to store any value to stored procedure
using setXX() method..

OUT parameter used to get the information or values from the
stored procedure using getXX() method,that object to
registered using registerOutParameter()

INOUT used to both store and get the information...