Answer Posted / kino

Unlike data fields, method names can be duplicated. This is
an important feature that allows method overriding, which
in turn facilitates polymorphism in the design of object-
oriented programs. Method overriding allows a subclass to
provide its own implementation of a method already provided
by one of its superclasses. When a method is called on an
object, IDL searches for a method of that class with that
name. If found, the method is called. If not, the methods
of any inherited object classes are examined in the order
their INHERITS specifiers appear in the structure
definition, and the first method found with the correct
name is called. If no method of the specified name is
found, an error occurs.

We can think of overriding as redefining. When we want to
redefine an inherited behaviour in a more specialised way,
we must provide implementation with the exact method
signature as the inherited method (that we want to
redefine).


For example:

If I define class A:
class A{
void m(){
}
}
We can be making objects from A like this:
A a = new A;
And we can call its method m like this:
a.m();

If we also define class B as a child of A like this:
class B extends A {
}
Then we know it inherits method m from its parent, class A

So we can do this:
B b = new B();
b.m();
The above works because m is inherited.

if u dont understand go through this link.
http://www.tgs.com/support/oiv-java-
release_notes/extension/guide_content.html

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