ArrayList add and get problems. 2

[Miros]

I have a class I defined, MyObject, and I want to create an ArrayList of this class. The add works fine:
[pre]
data.add( new myobject( ) ) ;
[/pre]

But when I try to get this way:
[pre]
MyObject mo = data.get( row ) ;
[/pre]

I get a compile time "incompatible types" error.

Does anyone know how to resolve this?

Rose/Miros

 

[Miros]

Found the answer!

Thanks Diancecht!

Silly question, did you play DragonRealms in another life?

 

[Diancecht]

I played online this life for a long time, but not DragonRealms, maybe in another life

Glad you got your problem solved.

Btw, if you're running Java 1.5 and you're populating the ArrayList only with objects of your class, you can consider the use of generics.

Cheers,
Dian

 

[sedj]

For anyone else reading this post :

In Java version below 1.5, one is required to cast the object from the ArrayList :

MyObject mo = (MyObject)arrayList.get(i);

In Java 1.5, if you define ArrayList as :

ArrayList list = new ArrayList();

then a cast (as above) is still required.
However, the cast is not required in 1.5 if you use generics, and declare your ArrayList as :

ArrayList<MyObject> list = new ArrayList<MyObject>;

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[Miros]

Oh thanks! That's that template stuff I need to learn someday...

Anyone know of a good reference book?

 

[sedj]

http://java.sun.com/docs/books/tutorial/extra/generics/index.html

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