Java Thread

public class Main implements Runnable {

    private boolean running = true;

    public void stopExecution ()
    {
        running = false;
    }

    public void run() {
        do
        {

            System.out.println("Hello from a thread!");
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {}

        } while( running );
    }

    public static void main(String args[]) {
        Main main = new Main();
        Thread thread = new Thread( main );
        thread.start();

        //Call stopExecution(); at some point, e.g. key release
        try {
            Thread.sleep(2500);
        } catch (InterruptedException e) {}

        main.stopExecution();
    }

}