java - How to wait for all callables to finish executing before proceeding? -

i have following code hashed out:

public class mycallable implements callable<long> {     @override     public long call() throws exception {         // stuff...     } }  public class mycontroller {     private executorservice executor = executos.newcachedtreadpool();      public long concurrentdostuff() {         list<mycallable> workers = makeworkers();          list<long> allresults = new arraylist<long>();         for(mycallable worker : workers) {             future<long> workerresults = executor.submit(worker);              try {                 allresults.add(workerresults.get());             } catch(interruptedexception ie) {                 // handle...             } catch(executionexception ee) {                 // handle...             }         }          // question: how pause here , wait workers finish?     } } 

after for-loop, want wait workers finish before proceeding further. what's best/safest/most-efficient way this? in advance!

you must shut executor down shutdown , wait until jobs have been processed awaittermination.