Displaying the central difference table
DecimalFormat df = new DecimalFormat ( " # . # # # # # # # # " ) ; for ( int i = 0 ; i < n ; i ++ ) { for ( int j = 0 ; j < n - i ; j ++ ) System . out . print ( y [ i ] [ j ] + " TABSYMBOL " ) ; System . out . println ( " " ) ; }