question: public static int nextSetBit ( long [ ] v , int start ) { int wordindex = start > > > LONG_LOG2_SIZE ; if ( wordindex >= v . length ) { return - 1 ; } long cur = v [ wordindex ] & ( LONG_ALL_BITS << start ) ; for ( ; ; ) { if ( cur != 0 ) { return ( wordindex * Long . SIZE ) + Long . numberOfTrailingZeros ( cur ) ; } wordindex ++ ; if ( wordindex == v . length ) { return - 1 ; } cur = v [ wordindex ] ; } }
target:  Find the next set bit.