Java_invokeall_ return Value _ multiple threads executing simultaneously, canceling timeout thread

 PackageCom.demo.test4;Importjava.util.ArrayList;Importjava.util.List;Importjava.util.concurrent.Callable;Importjava.util.concurrent.CancellationException;Importjava.util.concurrent.ExecutionException;ImportJava.util.concurrent.ExecutorService;Importjava.util.concurrent.Executors;Importjava.util.concurrent.Future;ImportJava.util.concurrent.TimeUnit;/** * @authorqq:1236897 Cancel Timeout thread if limit time is exceeded **/ Public classInvokedemo {/**     * @paramargs*/     Public Static voidMain (string[] args) {//TODO auto-generated Method StubExecutorservice exec =Executors.newcachedthreadpool (); List<SearchTask> Searchtasks =NewArraylist<searchtask>(); Searchtask St=NULL;  for(inti = 0; I < 10; i++) {St=NewSearchtask (i, 200);//specify 2001 mm for maximum execution time            if(i = = 5) St=NewSearchtask (i, 2001);//specify 2001 mm for maximum execution timeSearchtasks.add (ST); }        Try {            //requires that the result be returned within 2000 milliseconds, otherwise the execution is canceled. List<future<list<person>>> futures =Exec.invokeall (Searchtasks,, timeunit.milliseconds);//InvokeAll//The first parameter is the task list, the second parameter is the expiration time, and the third is the expiration unit            intCount = 0;  for(future<list<person>>future:futures) {                Try{List<Person> students =Future.get ();  for(person student:students) {System.out.println (student.tostring ()); }                } Catch(cancellationexception e) {System.out.println ("Cancel"); Future.cancel (true); } System.out.println ("-----------------------" +Count+ "--------------------"); Count++;        } exec.shutdown (); } Catch(interruptedexception e) {e.printstacktrace ();        Thread.interrupted (); } Catch(executionexception e) {e.printstacktrace (); }    }}/*** @filename: Searchtask * @description: Query task *@authorLida * @date 2013-4-1 pm 3:02:29*/classSearchtaskImplementsCallable<list<person>> {     Public Final intClassID;  Public LongSleeptime; /*** <p> * Title: * </p> * <p> * Description: * </p> * *@paramClassID * Class number *@paramsleeptime * Number of hours spent in analog operations (MS)*/Searchtask (intClassID,Longsleeptime) {         This. ClassID =ClassID;  This. Sleeptime =Sleeptime; } @Override PublicList<person> Call ()throwsException {//the number of hours that the simulation operation took (milliseconds)Thread.Sleep (sleeptime); List<Person> stulist =NewArraylist<person>(); Person P=NewPerson (1, "Name", 2); Person P2=NewPerson (2, "name", 3);        Stulist.add (P);        Stulist.add (p2); returnstulist; }}classPerson {Private intID; PrivateString name; Private intClassID;  PublicPerson (intID, String name,intClassID) {         This. ID =ID;  This. Name =name;  This. ClassID =ClassID; }     PublicString toString () {returnPerson.class. GetName () + "(ID:" + This. ID + ", Name:" + This. Name+ ")"; }}

Java_invokeall_ return Value _ multiple threads executing simultaneously, canceling timeout thread