Component.java

abstract class Component implements Netwerk {
   protected Component(double v) {
      value=v;
   }
   protected double value;
};

abstract class BasisNetwerk implements Netwerk {
   protected BasisNetwerk(Netwerk n1, Netwerk n2) {
      netw1=n1;
      netw2=n2;
   }
   protected Netwerk netw1;
   protected Netwerk netw2;
}