public class Start extends Thread {
    public void run() {
        System.out.println("I'm running...");
        while (true);
    }
    public static void main(String[] args) {
        (new Start()).start();
        (new Start()).start();
        (new Start()).start();
        System.out.println("main is running...");
        while (true);
    }
} // end of class Start