java - How to wait for all threads to finish, using ExecutorService? -

i need execute amount of tasks 4 @ time, this:

executorservice taskexecutor = executors.newfixedthreadpool(4); while(...) {     taskexecutor.execute(new mytask()); } //...wait completion somehow 

how can notified once of them complete? can't think better setting global task counter , decrease @ end of every task, monitor in infinite loop counter become 0; or list of futures , in infinite loop monitor isdone of them. better solutions not involving infinite loops?

thanks.

basically on executorservice call shutdown() , awaittermination():

executorservice taskexecutor = executors.newfixedthreadpool(4); while(...) {   taskexecutor.execute(new mytask()); } taskexecutor.shutdown(); try {   taskexecutor.awaittermination(long.max_value, timeunit.nanoseconds); } catch (interruptedexception e) {   ... }