Repetir uma Thread a cada 1Milisecond

import java.util.Timer;
public class main {

    public static void main(String[] d){
        Timer time = new Timer();
        time.schedule(new Mainloop(), 500, 1);
    }
}

public class Mainloop extends TimerTask{

    private static GameObject[] toUpdate = new GameObject[3600000];
    private static int actualindex = 0;
    @Override
    public void run() {
        try {
            toUpdate[actualindex].Update();
            toUpdate[actualindex++] = null;
        } catch (Exception e) {
            System.out.println(actualindex++);
        }
        // outros metodos irrelevantes

while(true){
        try {
            toUpdate[actualindex].Update();
            toUpdate[actualindex++] = null;
        } catch (Exception e) {
            System.out.println(actualindex++);
        }