Difference between System.currentTimeMillis() and Date getTime()?

Question

I was hoping to squeeze a tiny performance gain out of many calls to a function that returns a timestamp. The function looks like this:

public static long get_n         


        

Answer 1

No difference, and Calendar.getTimeInMillis() is also same. because the return results is the number of milliseconds since January 1, 1970, 00:00:00 GMT. you will get a same long value whereever you are all over the word.