Calculate time to complete a method or a block of code in Java.

There is no direct way to calculate the time of a mehtod which is in execution. But there is a method to calculate current time by which we can approx calculate the total  time.

Class : System
Method : currentTimeMillis

Use:

1. public static void main(String[] args) {
2. long startTime = System.currentTimeMillis();
3. System.out.println(method(some_value));
4. long endTime = System.currentTimeMillis();
5. long totalTime = endTime - startTime;
6. System.out.println("total time in milli seconds "(totalTime);
7. }