public static double listAdder(ArrayList list) { ??? }

Examine the listAdder method fragment above. Complete the method so that it displays the list elements all on one line and returns the sum of the elements. Demonstrate the method by calling it in main with ArrayLists of three different classes that extend class Number.

SAMPLE OUTPUT

12 21 7 16 8 13

Integer list totals 77.0

1.1 2.2 3.3 4.4 5.5 6.6

Double list totals 23.1

12 20 4 7

Byte list totals 43.0