Chapter 18.4, Problem 20SC

Explanation of Solution

Implementing generic method “average”:

//define a method average with type E extends Measurable

public static <E extends Measurable>

double average(E[] objects)

{

//if the length of objects is zero

if (objects.length == 0)

{

//return zero

return 0;

}

//declare a variable to hold sum

double sum = 0;

//iterate through the objects

for (E obj : objects)

{

//find the sum of elements

sum = sum + obj.getMeasure();

}

//find the average and return the value

return sum / objects...