How can i execute code for a specific amount of time in java?-CodePudding

I'd like to execute some code for, let's say 5 seconds, inside of a method that listens for events. I've tried to use Threads but wasn't able to make it work properly.

CodePudding user response：

Just an idea not for deployment but should give you an starting point

//record start time
long start=System.currentTimeMillis();

//keep running until 5000ms[5s] have 
//elapsed since the start
while(System.currentTimeMillis()-start<=5000)
{
 //Do some stuff here
}

If your event handler is executed in the same thread as your system then this will block your system for 5 seconds and stop it from handling other events during that duration.

So its better to dispatch your events to seperate threads or execute the above logic in a seperate thread

CodePudding user response：

A trivial approach would be to simply execute your code in a loop and check in each iteration whether your timing-threshold was reached, such as:

// necessary imports for using classes Instant and Duration.
import java.time.Instant;
import java.time.Duration;

// ...

// start time point of your code execution.
Instant start = Instant.now();

// targeted duration of your code execution (e.g. 5 sec.).
Duration duration = Duration.ofSeconds(5);
     
// loop your code execution and test in each iteration whether you reached your duration threshold.
while (Duration.between(start, Instant.now()).toMillis() <= duration.toMillis())
{
    // execute your code here ...
}