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class B {
public int i=1;
public void f() {
// Log.d("B","B:f() " + i);
// return this;
System.out.println("class B invoke f method");
}
}
public class D extends B {
public void f() {
// Log.d("D","D:f() " + (++i));
// return this;
// super.f();
System.out.println("class D invoke f method");
super.f();
}
public static void main(String[] args) {
new D().f();
}
}