public class Test implements Runnable {
    static public void main(String A[]) {
        Test myTask1=new Test();
        myTask1.parameter=1;
        (new Thread(myTask1)).start();
        Test myTask2=new Test();
        myTask2.parameter=-1;
        (new Thread(myTask2)).start();
        Test myTask3=new Test();
        myTask3.parameter=10;
        (new Thread(myTask3)).start();
    }

    private int parameter;

    public void run() {
        int i=0;
        while (true) {
            System.out.println("DO: "+i);
            i=i+parameter;
            try {
                Thread.currentThread().sleep(100);
            } catch (Exception e) {}
        }
    }

}