class BoringThread extends Thread {
    static int numberOfThreads = 0;
    int threadNumber = ++numberOfThreads;

    public void run() {
        int nrReps = 0;
        while (true) {
            System.out.print("Tråd nummer " + threadNumber + " har kört ");
            System.out.println(++nrReps + " varv i loopen.");
        }
    } // run
} // class BoringThread

public class ThreeBoringThreads {
    public static void main(String[] args) {
        BoringThread t1 = new BoringThread();
        BoringThread t2 = new BoringThread();
        BoringThread t3 = new BoringThread();
        t1.start();
        t2.start();
        t3.start();
    } // main
} // class ThreeBoringThreads