Question

I am trying to run multiple threads concurrently, where each thread is computing value for a particular point in time and returning a result. I was thinking of using the Executor class but it seems am not doing it correctly. I was wondering if this piece of code is correct for that. Or what is the best way of doing this?

ExecutorService tasker = Executors.newFixedThreadPool(20);
    for(double t = 0.0; t<=5.0; t = t + 0.50 ){ // t is time interval
        tasker.execute(new MyThread(t));
    }

Answer 1

You dont need to pass a Thread inside the execute method.
Instead you need to pass a Runnable object, like so:

ExecutorService tasker = Executors.newFixedThreadPool(20);
for(double t = 0.0; t<=5.0; t = t + 0.50 ){ // t is time interval
    tasker.execute(new MyRunnable(t));
}
....
....
class MyRunnable implements Runnable
{
    MyRunnable(double i)
    {
       System.out.println(i);
       ...
    }
}