question: public static void nanosleep ( long nanos ) throws InterruptedException { if ( Thread . interrupted ( ) ) throw new InterruptedException ( ) ; if ( nanos <= 0 ) { return ; } if ( nanos >= 1000000 ) { Thread . sleep ( nanos / 1000000 , ( int ) ( nanos % 1000000 ) ) ; } else { if ( pureMode ) { Thread . yield ( ) ; } else { _nanosleep ( ( int ) nanos ) ; } } }
target:  Sleeps for the specified number of nanoseconds.