question: public CharCharMap clone ( ) { char [ ] k = new char [ key . length ] , v = new char [ value . length ] ; System . arraycopy ( key , 0 , k , 0 , key . length ) ; System . arraycopy ( value , 0 , v , 0 , value . length ) ; return new CharCharMap ( k , v , f ) ; }
target:  Returns a deep copy of this map. <br> This method performs a deep copy of this hash map, but with primitive keys and values it doesn't matter much.