question: public static String toString ( char [ ] [ ] c ) { StringBuffer sb = new StringBuffer ( ) ; for ( int i = 0 , max = c . length ; i < max ; ++ i ) { if ( i != 0 ) sb . append ( '.' ) ; sb . append ( c [ i ] ) ; } return sb . toString ( ) ; }
target:  Converts a char[][] to String, where segments are separated by '.'. 