Question

I’m having two Java classes. The first implements the following method:

@Override public void onView(Object o) {
    o = (Foo) o;
    o.bar();
}

The second class Foo provides the bar method.

The problem now is that I get the “Cannot find symbol” compile error on the o.bar(); call.

What I’m doing wrong and how can I achive the call of the bar method?
Thanks

Answer 1

Your o is a reference to an Object, not Foo. The cast works since Foo is a subtype of Object, like any other class, but o remains a reference to an Object.

What you want is ((Foo) o).bar();