I need a method in java netbeans to show me the students that are in low performance, I'm doing it with parallel vectors

public String EstudiantesBajos(){
         float bajos = getNotafinal(0);
        int pos = 0;
        for (int i = 0; i < Get_Tam(); i++) {
            if (bajos > getNotafinal(i)) {
                pos = i;
                bajos++;
            }
        }
        return getNombre(pos);
     }