Returning const reference of an arraylist

Question

I really admire java features and I don\'t want to give up using it for the next problem:

I have a class that might be inherited, and inside of it is a private Arr

Answer 1

:) You have several options:

• Don't expose getter, provide only methods which are allowed to call, e.g.

  public void addToList(Object arg) { this.arr.add(arg);}

• Return immutable object:

  public List getArr() { return Collections.unmodifiableList(this.arr); }