Question

If you have two classes Boo and Foo, and each Instance of Foo contains in it an instance of Boo, can you have a Setter for a private attribute in Boo contained inside in the constructor of Foo?

Answer 1

Yes, absolutely. Why would you not be able to?

class Boo {
    private String name;

    public void setName(String name) {
        this.name = name;
    }
}

class Foo {
    private final Boo boo;

    public Foo() {
        boo = new Boo();
        boo.setName("boo");
    }
}

The fact that you ask the question suggests there’s something you think might go wrong – what in particular did you have in mind?