/** * Returns the current time in milliseconds.  Note that * while the unit of time of the return value is a millisecond, * the granularity of the value depends on the underlying * operating system and may be larger.  For example, many * operating systems measure time in units of tens of * milliseconds. * * <p> See the description of the class <code>Date</code> for * a discussion of slight discrepancies that may arise between * "computer time" and coordinated universal time (UTC). * * @return  the difference, measured in milliseconds, between *          the current time and midnight, January 1, 1970 UTC. * @see     java.util.Date */public static native long currentTimeMillis();