How to return value from thread (java)

Question

I made a thread like this one bellow:

public class MyThread implements Runnable {
  private int temp;

  public MyThread(int temp){
     this.temp=temp;
  }
         


        

Answer 1

In this case, you have to use Callable instead of Runnable (very similar): http://docs.oracle.com/javase/7/docs/api/java/util/concurrent/Callable.html

public class MyThread implements Callable { 

    private int temp;

    public MyThread(int temp){
         this.temp=temp;
    }
    @Override
    public Integer call() {
        temp+=10;
        return temp;
    }

}


public static void main(String[] args) throws InterruptedException, ExecutionException {
           ExecutorService service =  Executors.newSingleThreadExecutor();
           MyThread myTask = new MyThread(10);
           Future future = service.submit(myTask);
           Integer result = future.get();
           System.out.println(result);
}