That's right dear James but, I found some situations where I can be
nice that you could have multi inheritance like this (http://
www.javaworld.com/javaworld/jw-10-2005/jw-1024-multiple.html). Also I
want to accomplish this solution in a hypotetical way. I want to know
what to do if that happend, and do it the best way.
On 24 abr, 20:16, James Fraser <wulfgar....@gmail.com> wrote:
> To be honest, you should never really need multiple inheritance. If you find
> yourself needing to extend multiple types you may need to rethink your
> design.
>
>
>
>
>
>
>
> On Sun, Apr 24, 2011 at 6:46 PM, RoqueManuel <skaro...@gmail.com> wrote:
> > Hello guys,
>
> > I'm facing a problem
> > I need to solve a problem of multi inherence using inner classes.
>
> > So the problem is this.
>
> > I have a Father class and also a Mother class and I need that the
> > class Son extends from both Father and Mother so Son class can respond
> > to class to Father Interface and also Mother Interface. So I did the
> > next code. (What I usually did).
>
> > class Father{
> > void m(){
> > System.out.println("m()");
> > }
> > }
>
> > interface Mother{
> > void n();
> > }
>
> > class Son extends Father implements Mother{
> > public void n(){
> > System.out.println("n()");
> > }
> > }
>
> > So we need to implement the solution using a inner class. And we did
> > something like this.
>
> > class Father{
> > void m(){
> > System.out.println("m()");
> > }
> > }
>
> > class Mother{
> > public void n(){
> > System.out.println("n()");
> > }
>
> > class Son extends Father {
> > void n(){ // Metodo wraper se llama igual e invoca a otro
> > metodo que
> > se llama igual.
> > Mother.this.n();
> > }
> > }
>
> > public static void main(String[] args) {
> > Mother.Son hijo = new Mother().new Son ();
> > hijo.m();
> > hijo.n();
> > }
>
> > }
>
> > This approach is better according to what our teacher explain. And
> > this solution can be use with more than two classes.
>
> > And I did this.
>
> > class Human{
> > void m(){
> > System.out.println("m()");
> > }
> > }
>
> > class Dead{
> > void n(){
> > System.out.println("n()");
> > }
>
> > class InnerDeath extends Human{
> > void n(){
> > Dead.this.n();
> > }
> > }
> > }
>
> > public class Vampire {
> > void o(){
> > System.out.println("o()");
> > }
>
> > class Dracula extends Dead.InnerDeath{
> > Dracula(){
> > new Dead().super();
> > }
>
> > void o(){
> > Vampire.this.o();
> > }
> > }
>
> > public static void main(String[] args){
> > Vampire.Dracula dracula = new Vampire().new Dracula();
> > dracula.m();
> > dracula.n();
> > dracula.o();
> > }
> > }
>
> > So what I have is that, I use two inner classes one that extends from
> > Humand and can acces to Dead attributes and methods, And It's from
> > this class that extends Dracula and so that Dracula is the result and
> > can respond to all calls to methods of the other classes.
>
> > Is this the best approach? Do you know a better way to acomplish the
> > expected result?
> > I also have another posible solutions to accomplish this problem. I
> > hope that someone can comment about it. What I want is to have a
> > solution like a pattern to problems of what I should do if I need two
> > class (I already have that: inherence plus inner class) three, four,
> > five and so on.
>
> > Thanks in advance.
>
> > Roque Rueda.
>
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