Submit Future object to ExecutorService - Java Thread

Java examples for Thread:ExecutorService

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Description

Submit Future object to ExecutorService

Demo Code


import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class Simplest {
  public static void main(String[] args) throws InterruptedException, ExecutionException, TimeoutException {
    ExecutorService executor = Executors.newSingleThreadExecutor();
    Future<Integer> future = executor.submit(new TestThread());
    // Wait for the thread to complete
    executor.shutdown();/*w  w  w  .jav a2s . com*/
    // Shutdonw Immidiatly
    // executor.shutdownNow();
    System.out.println("future.isDone():" + future.isDone());
    //Wait for 2 seconds to get result
    Integer integer = future.get(2,TimeUnit.SECONDS);
    System.out.println("future.isDone():" + future.isDone());
    System.out.println(integer);
  }
}

class TestThread implements Callable<Integer> {
  @Override
  public Integer call() throws Exception {
    try {
      Thread.sleep(2000);
      System.out.println("Thread Executing");
    } catch (Exception e) {
      System.out.println(e);
    }
    return 5;
  }
}

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