Inheritance - weird behaviour ?

[Pho Tek]

I have this piece of code:

public class A {
    public static void main(String[] args) {
Child c = new Child();
c.f(); //1
    }
    public static void pr(String s){
    System.out.println(s);
    }    
}
class Parent{
    public Parent() { A.pr("Parent::constructor"); }
    public void f() { f_(); }
    public void f_() { A.pr("Parent::f_"); }
}
class Child extends Parent{
    public Child() { A.pr("Child::constructor"); }    
    public void f_() { A.pr("Child::f_"); }
}

I do not understand why line marked //1 calls the subclass's
f_() method instead of the superclass's ?
Thanks
Pho

[Fei Ng]

Since f_() method is overridden in Child it will get called if the Object is Child no matter where. Becuase of late binding at runtime the method that will be called depends on the acutally Object. Since Child is in used and it has f_() this method will get called.