The Java API Calendar class contains a method called getTimeInMillisec which enables you t...

The Java API

Calendar

class contains a method called

getTimeInMillisec

which enables you to retrieve the absolute time (in milliseconds) at which any

Calendar

object was created. As indicated in Section 8.15, you can get such an object by calling the

getInstance

class method. You can use this capability to evaluate the runtime of any chunk of code. All you have to do is create a

Calendar

object before the test code starts, create another

Calendar

object right after the code ends, and print out the difference in those two object’s times. To demonstrate this capability, write a short program called TestRuntime that asks the user for a desired number of iterations,

num.

Then have it measure the runtime for a loop of num iterations that executes the single statement:

Math.cos(0.01 * i);

The variable

i

is the loop count variable.