Java Threading callable_future_executors thread pool usage

1. Create a task first

 PackageCom.currentPro.task;Importjava.util.concurrent.Callable; Public classMuniustaskImplementsCallable<integer>{    PrivateInteger number;  PublicMuniustask (Integer number) { This. Number =Number ; } @Override PublicInteger Call ()throwsException {intresult; Result= Number-1; returnresult; }}

2. Create Taskexecutor

 Public class muniustaskexecutor {    protected  executorservice executors;    Initializes the thread pool     public   muniustaskexecutor (Integer threadnums) {        this. Executors = Executors.newfixedthreadpool (threadnums);    }}

3. Testing

 PackageCom.currentPro.task;Importjava.util.ArrayList;Importjava.util.List;ImportJava.util.Random;Importjava.util.concurrent.ExecutionException;Importjava.util.concurrent.Future; Public classTasktest { Public Static voidMain (string[] args)throwsinterruptedexception, executionexception {plustaskexecutor plustaskexecutor=NewPlustaskexecutor (10); List<Future<Integer>> resultlist =NewArraylist<future<integer>> (); Random Random=NewRandom ();  for(inti = 0; I < 4; i++) {Integer number= Random.nextint (10); System.out.println ("Random Value:" +Number ); Muniustask M1=Newmuniustask (number); Future<Integer> result =PlusTaskExecutor.executors.submit (M1);        Resultlist.add (result); }         for(future<integer>future:resultlist) {System.out.println ("Future result is-" + "-" + future.get () + "; and Task done is "+Future.isdone ()); }            }}

4. Results

Random value: 2random value:0Random value:2Random value:8-  true-   True-  true-  true

Java Threading callable_future_executors thread pool usage