class Banksystem2 {
    public static void main (String[] arg) {
	Bankkonto k = new Bankkonto();
	Thread ola = new Thread(new Kunde(k, "Ola"));
	Thread anne = new Thread(new Kunde(k, "Anne"));
	ola.start();  anne.start();
	try {
	    ola.join();  anne.join();
	} catch (InterruptedException e) {}
	System.out.println("Kontoen er paa kr " + k.status());
    }
}

class Bankkonto {
    private int saldo = 0;

    public void settInn (int kr) {
	int nySaldo = saldo + kr;
	saldo = nySaldo;
    }

    public int status () {
	return saldo;
    }
}

class Kunde implements Runnable {
    Bankkonto konto;
    String navn;

    Kunde (Bankkonto k, String n) {
	konto = k;  navn = n;
    }
    
    @Override
    public void run () {
	System.out.println(navn + " setter inn 100 kr.");
	konto.settInn(100);
    }
}