Brauche Hilfe bei Appentwicklung

public class Counter extends Thread
{
    boolean isRunning;
    int counter;


    public Counter(int counter)
    {
        this.counter=counter;
    }


    public void setRunning (boolean isRunning)
    {
        this.isRunning=isRunning;
    }

    public void run()
    {
        while(isRunning)
                try
                {
                    sleep(1000);
                    counter++;
                }
                catch(InterruptedException e)
                {}
     }
}

cV=0;         //cV - counter variable von wo aus der Counter anfangen soll

Counter counter=new Counter(cV);
counter.setRunning(true);
counter.start();