question: private Object singleElement ( int row , int col ) { Object res = null ; if ( this . isNull == null || ! this . isNull [ row * this . nFields + col ] ) { res = ArrayFuncs . newInstance ( this . types [ col ] , 1 ) ; System . arraycopy ( this . data [ col ] , row , res , 0 , 1 ) ; } return res ; }
target:  Extract a single element from a table. This returns an array of length 1.