In the Class below, the methods listed below is an example of:

public class Stuff $\{$

public static int sum$($int x$,$ int y$)\{$

return $($x $+$ y$)$;

$\}$

public static int sum$($int x$,$ int y$,$ int z$)\{$

return x $+$ y $+$ z;

$\}$

public static double sum$($double x$,$ double y$)\{$

return $($x $+$ y$)$;

$\}$

public static int sum$($int$[]$ array$)\{$

int sum $=0$;

for $($int x: array$)\{$

sum $+=$ x;

$\}$

return sum;

$\}$

$\}$