How to check how many milliseconds passed in some event(java) [duplicate]

Question

Possible Duplicate:
Calculating time difference in Milliseconds

How i can check how many milliseconds passed in some event in java? For example:

Want to start timer here<<
   function doSomething()
   .
   .
Want to finish timer here<<

I want to check how many milliseconds passed. Is there a way to do it?

Answer 1

System.nanoTime()

and compare the start value to end value. Here is the doc.

Returns the current value of the most precise available system timer, in nanoseconds.