If we re using java 8 we can try the new java time instant and java time duration classes.
Using duration java measure wall clock time.
Write a program which uses a timer with the least granularity available on your system to time how long a function takes to execute.
It is sometimes off and periodically needs to be corrected.
Below java 8 proceed to next method down in the article.
Java 8 brought us the new java time api which introduced several new types representing important time concepts.
Instead of the difference in system time between start and finish which could include time used by other processes on the computer.
Whenever possible use methods which measure only the processing time used by the current process.
Use of a clock is.
Take a look at the following example.
As these are designed for specific reasons it is important to choose the right one for your needs.
Measure elapsed time in java 8.
The instant and the duration classes.
The java time clock class provides access to the current instant date and time using a time zone.
Following is the declaration for java io clock class.
You ll now see how to calculate elapsed time using two of the new java time types.
A clock providing access to the current instant date and time using a time zone.
Instances of this class are used to find the current instant which can be interpreted using the stored time zone to find the current date and time.
Declaration following is the declaration for java time clock tick method.
Clock was added in java 8 and provides access to an instant in time using the best available system clock and to be used as a time provider which can be effectively stubbed for testing purposes.
The java time clock tick method obtains a clock that returns instants from the specified clock truncated to the nearest occurrence of the specified duration.
As such a clock can be used instead of system currenttimemillis and timezone getdefault.
The current date and time depend on the time zone and for globalized applications a time provider is necessary to ensure that the date and time are.
Another method in java lang system class is nanotime if we look at the java documentation we ll find the following statement.
The purpose of nanotime is to measure elapsed time and the purpose of currenttimemillis is to measure wall clock time.
To get the elapsed execution time in different.
Public abstract class clock extends object class constructors.
