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Thread: Linklist Question

  1. #1
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    Default Linklist Question

    Hey all! I'm new here, but hope to stay a while.

    So I have a project I'm working on that requires two different linklists - each with a different list of objects.

    My linklist is composed of nodes that contains the member variables 'Object data' and 'Node link'

    How do I call a getter method on 'data' when it gives me the error "getName() is not defined for the type Object"? It's defined for a different class which the Object holds.


    head = new Node(new Rentable(),null);
    head.data.getName();
    GIVES ME
    "Method getName() is not defined for type Object"
    Last edited by NeedzABetterSN; December 18th, 2010 at 07:35 PM.


  2. #2
    Administrator copeg's Avatar
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    Default Re: Linklist Question

    If I understand the problem correctly, your Node class contains its data as a type Object? So even when you create a new Node in the code posted with an object of type Rentable, it's reference is of type Object. So to access the functions defined in Rentable, you must cast the object
    head = new Node(new Rentable(),null);
    ((Rentable)head.data).getName();//should be checked at runtime with something like instanceof to make sure its the correct object or a class cast exception may be thrown.

  3. #3
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    Default Re: Linklist Question

    A wholehearted thank you.