Answer:

if ( array.length > 0 )
{
  . . .
  System.out.println("The average is: " + total / array.length  );
}      
else
  System.out.println("The array contains no elements." );

End of the Chapter

That about wraps it up for this chapter. You may wish to review the following topics, unless you are already maxed out.

Counting loops and arrays.
The length attribute of an array.
Array length determined at run time.
Enhanced for loops
Algorithm for determining the maximum element.
Algorithm for determining the minimum element.
Algorithm for determining the sum of the elements in an array.
Algorithm for determining the average of the elements in an array.

You have reached the end of the chapter.