Java Programming Tutorial – 61 – Simple Polymorphic Program

𝘴𝘸𝘪𝘯𝘦 𝘧𝘭𝘶???

You could make the noise method in Animal class an abstract method.

OMG!!!! As a Java beginner. This is the first time I understand Polymorephism clearly. I really love your voice and the way you teach. You are amazing teacher Bro!!

swine flu lmao so 2009

@thenewboston what if im trying to integrate this new cool stuff into my general animallist class, how I do it without any errors? XD as a matter of fact I was coding it, but received a nullpointer Exception. My Program added the dog and it was also barking, but the fish wasn't added…

dog cannot be converted to ANimal/.

I'm a bit confused of where to put the square brackets [] when you create an array. In tutorial 55, Bucky placed the square brackets like this: food bucky[] = new food[2]. He placed it at the array name for the left side of the equal sign, and placed the other square brackets beside the class name. But int this video, and in the previous one as well, he placed both square brackets with the class name: Animal[] thelist = new Animal[2].

How do i assign the value of 100 objects to array indexes in an efficient way then??

So when you create the Animal array with Animal[] thelist= new Animal[2], I understand the thelist=new Animal[2] part, what does the Animal[] actually do or what would you call it. I've seen people create a array class of a different class and was curious was that does. For example, Dog[] thelist=new Animal[2] or Fish thelist=new Animal[2]. And also, would Animal[] thelist=new Fish[2] be possible or would it throw a error? I assume it would because Animal is the parent class?

OMG, that was so clear!!! I think I finally understand polymorphism now -.-

you kept the promise buck. you made me pro in polymorphism! buck's the man!

Why this program shows me an error when I don't put noise() in Animal class?
Technically I'm calling noise() of Dog and Fish class not of Animal class….

Java should add these tutorials in their product. Who agrees with me?

say glurp slurp one more time.

an easier way…

Animal theList[] = new Animal[2];
theList[0] = new Dog();
theList[1] = new Fish();

lecture on interface????

Currently the views on this video are 187,187

It's kind of sad to see these videos lose views overtime. This video has over 20,000 views less than the array holding one. Almost 20,000 people gave up (Excluding ones that may just need a refresher on or learn a specific concept, or the ones who have not yet continued but plan to).

i made the array thelist[1] with 1 as an index i wanted to use thelist[0] for fish class and thelist[1] for the dog class but an error pops up when i run the program can anyone explain?

A tip for anyone interested. You can fill the array an easier way.

theList[0] = new Dog();
theList[1] = new Fish();

I think it's easier doing this than writing more code out. Any thoughts?