Part $2$

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. The operator instanceof$$can test for object type which would be necessary to have in a foreach loop for the data types types supported $($ Integer $,$ Byte and Double $)$

SAMPLE OUTPUT

$1221716813$

Integer list totals $77\mathrm{.}0$

$1\mathrm{.}12\mathrm{.}23\mathrm{.}34\mathrm{.}45\mathrm{.}56\mathrm{.}6$

Double list totals $23\mathrm{.}1$

$122047$

Byte list totals $43\mathrm{.}0$