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class A {
protected class InnerA {
public InnerA() {
System.out.println("A.InnerA()");
}
public void f() {
System.out.println("A.InnerA.f()");
}
}
private InnerA y = new InnerA();
public A() {
System.out.println("New A()");
}
public void insertYolk(InnerA yy) {
y = yy;
}
public void g() {
y.f();
}
}
class B extends A {
public class InnerB extends A.InnerA {
public InnerB() {
System.out.println("B.InnerB()");
}
public void f() {
System.out.println("B.InnerB.f()");
}
}
public B() {
insertYolk(new InnerB());
}
}
public class MainClass {
public static void main(String[] args) {
A e2 = new B();
e2.g();
}
}
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