Calculating Latenciy in java and database

calculating latencies ,  for a program , query or an service / project .,
after little research here i am deriving mechanism to calculate latencies,
first iam considering database : here my aim is calculate execution time for
a query.

>before executing the query run ‘set timing on’ comamnd in sql command line
>after this for every query execution we can find query execution time at the end of the
query result.

note: here i tested with Timesten database.,

> next thing calculating latency by Java.
here i am using simple logic is finding the difference between start and timings for
a execution of group of stetements / statement.
first iam reading the current system time in milliseconds before and after the execution of a particular task.

here is a sample code…

long start=System.currentTimeMillis();

/*

my service statements

*/

long end=System.currentTimeMillis();

long latencie = end-start;

System.out.println(“latency for service statements = “+latencie);

that’s it ! we have done with calculating latenciy .