Fire and Forget - Runnable Tasks

Executors accept a java.lang.Runnable which contains (potentially computationally or otherwise long-running or heavy) code to be run in another Thread.

Usage would be:

Executor exec = anExecutor;
exec.execute(new Runnable() {
    @Override public void run() {
        //offloaded work, no need to get result back
    }
});

Note that with this executor, you have no means to get any computed value back.

With Java 8, one can utilize lambdas to shorten the code example.

Executor exec = anExecutor;
exec.execute(() -> {
    //offloaded work, no need to get result back
});