question: public LongMap ( LongMap < ? extends V > map ) { this ( map . capacity , map . loadFactor ) ; stashSize = map . stashSize ; System . arraycopy ( map . keyTable , 0 , keyTable , 0 , map . keyTable . length ) ; System . arraycopy ( map . valueTable , 0 , valueTable , 0 , map . valueTable . length ) ; size = map . size ; zeroValue = map . zeroValue ; hasZeroValue = map . hasZeroValue ; }
target:  Creates a new map identical to the specified map. 