Java thread pool, getting the return value

The callable interface is used in the program to get the return value of the thread.

 PackageLiuzh;Importjava.util.LinkedList;Importjava.util.List;Importjava.util.concurrent.Callable;Importjava.util.concurrent.ExecutionException;Importjava.util.concurrent.Future;ImportJava.util.concurrent.LinkedBlockingDeque;ImportJava.util.concurrent.ThreadPoolExecutor;ImportJava.util.concurrent.TimeUnit;classTaskImplementsCallable<string> {    PrivateString filename;  PublicTask (String filename) { This. FileName =filename; } @Override PublicString Call ()throwsException {Try{Thread.Sleep (1000); } Catch(interruptedexception e) {e.printstacktrace (); } System.out.println ("Done" +filename); return"Return value" +filename; }}/*** Create a thread pool, assign 50 tasks, and the maximum concurrency is 5 * After the end of the run, output the end of each thread return * title:threadpoolexecutortest * descript: *@authorLiuzh * @date May 18, 2016 PM 8:16:26*/ Public classThreadpoolexecutortest { Public voidStart ()throwsinterruptedexception, executionexception {/*** Create thread pool with a maximum concurrency of 5 * linkedblockingdeque, which means to perform a task or put into a queue*/Threadpoolexecutor TPE=NewThreadpoolexecutor (5, 10, 0, Timeunit.seconds,NewLinkedblockingdeque<runnable>(),                NewThreadpoolexecutor.callerrunspolicy ()); //The return value of the storage threadlist<future<string>> results =NewLinkedlist<future<string>>();  for(inti = 0; I < 10; i++) {Task Task=NewTask (string.valueof (i)); System.out.println ("Put into thread pool:" +i); //call submit to get the return value of the threadfuture<string> result =Tpe.submit (Task);                    Results.add (result); }        //This function means that new tasks are no longer received.//if not called, Awaittermination will always blockTpe.shutdown (); //1 days, Analog forever waitingSystem.out.println (Tpe.awaittermination (1, timeunit.days)); //Output Results         for(inti = 0; I < 10; i++) {System.out.println (Results.get (i). get ()); }    }     Public Static voidMain (string[] args)throwsinterruptedexception, executionexception {threadpoolexecutortest test=Newthreadpoolexecutortest ();    Test.start (); }}

Sample output:

Put into thread pool: 0
Put into thread pool: 1
Put into thread pool: 2
Put into thread pool: 3
Put into thread pool: 4
Put into thread pool: 5
Put into thread pool: 6
Put into thread pool: 7
Put into thread pool: 8
Put into thread pool: 9
Complete 1
Complete 0
Complete 2
Complete 3
Complete 4
Complete 9
Complete 6
Complete 8
Complete 5
Complete 7
True
return value 0
return value 1
return value 2
return value 3
return value 4
return value 5
return value 6
return value 7
return value 8
return value 9

Reference: http://www.cnblogs.com/vhua/p/5277694.html

Http://www.cnblogs.com/hzmark/archive/2013/01/21/JavaExecutor.html

Java thread pool, getting the return value