Is it possible to calulate execution time?

[supahsain08]

Hello, is it possible to calculate the time it took the program to execute

Thanks
btw i am using Jcreator IDE

[Tony]

The term is benchmark(ing)

There are usually fancy libraries available for that, but the bottom line is that you simply need to record the current time in a variable, run whatever, record the current time afterwards, and take the difference.

[rizzix]

Hmm, well depending on whether you want to calculate the startup time as well you'd have to do this in two different ways.

If you don't care about the jvm startup time, you can make use of the System.currentTimeMillis(); or System.nanoTime(); methods.

Use them at the beginning and end of your main() method. Something like this:

code:

long start_time = System.nanoTime(); // rest of your code in `main` System.out.printf("Time elapsed in ns: %d\n", System.nanoTime()  - start_time);

Edit: Ah, Tony beat be to it.

[supahsain08]

Thanks