Question

So I have this code here, that adds my “NamePrinter” runnable class as ExecutorService tasks. Everything works fine, but I’d like to get rid of that extra class. So I am asking is there a way to submit method to ExexutorService?

Here is the code that I currently have:

public void start(){
        Collection<Future<?>> futures = new LinkedList<>();
        final ExecutorService es = Executors.newFixedThreadPool(poolSize);

        for (int i = 0; i < 10; i++) {
        futures.add(es.submit(new NamePrinter(name)));
        }

        es.shutdown();
}

But I’d like it to be something like this:

public void start(){
            Collection<Future<?>> futures = new LinkedList<>();
            final ExecutorService es = Executors.newFixedThreadPool(poolSize);

            for (int i = 0; i < 10; i++) {
            futures.add(es.submit(namePrint(i+"name"))); // This code doesn't work, I just made it so you could understand what I mean.
            }

            es.shutdown();
    }

public void namePrint(String name){  // I'd like this to be the task that ExecutorService runs.

System.out.println(name);

}

Is this something that is possible to achieve?

Answer 1

The closest you can come as an anonymous inner class:

for (int i = 0; i < 10; i++) {
    final int x = i;
    futures.add(es.submit(new Runnable() {
        @Override public void run() {
            namePrint(x + "name");
        }
    }));
}