public class negerino {

    private Double TreFloatMedel(Double[] floatArray) {
        Double totalt = 0.0;
        for (int i=0; i<floatArray.length; i++) {
            totalt += floatArray[i];
        }
        return totalt/floatArray.length;
    }

    public static void main(String[] args) {
        Double[] leFloatz = {5.0, 3.0, 2.0};
        negerino neger = new negerino();
        Double r = neger.TreFloatMedel(leFloatz);
        System.out.println(r.toString());
    }

}