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Thread: Parameterized array type as a method parameter

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    Default Parameterized array type as a method parameter

    I cannot find an article on how to do this, so hopefully someone can help me here. I have the following method:
    public static void doSomething(List<? extends GenericClass> input)
    {
    	// op
    }
    ^ This compiles and works, ensuring I can only pass in a List of a type extending GenericClass.

    But now I want it to accept an Array instead of List. This is where I'm stuck:
    public static void doSomething(<? extends GenericClass>[] input)
    {
    	// op
    }
    ^ A wrong guess at the syntax which does not compile. Anyone know the solution? Yes, one is to convert Array into ArrayList before calling the 1st method above, but I'd rather bypass this if possible.
    Last edited by Lediator; August 1st, 2014 at 01:12 AM. Reason: used highlight for code


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    Default Re: Parameterized array type as a method parameter

    Arrays are not generic.
    What you want is to do:
    public static void doSomething(GenericClass[] input)

  3. The Following User Says Thank You to Cornix For This Useful Post:

    Lediator (August 1st, 2014)

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    Default Re: Parameterized array type as a method parameter

    Welcome to the Forum! Thanks for taking the time to learn to post code correctly, and if you haven't already, please read this topic to see other useful info for newcomers.

    You may find the discussion on this page helpful.

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    Default Re: Parameterized array type as a method parameter

    Quote Originally Posted by Cornix View Post
    Arrays are not generic.
    What you want is to do:
    public static void doSomething(GenericClass[] input)
    Yes exactly what I was looking for! Amazing how I didn't know that about arrays. Thanks for that.

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