Sunday, April 3, 2011

java.util.ArrayList<T>

This is the implementation of java.util.Arrays.asList: ()

public static <T> List<T> asList(T... a) {
    return new ArrayList<T>(a);
}

How can that compile? I can't find a constructor for ArrayList, AbstractList or AbstractCollection that accepts a parameter like T... och T[].

Source code from:

java version "1.5.0_16"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_16-b06-284)
Java HotSpot(TM) Client VM (build 1.5.0_16-133, mixed mode, sharing
From stackoverflow
  • Okay, I think I see the confusion now.

    The ArrayList type in question is a nested type within the Arrays class - it's not java.util.ArrayList.

    Jon Skeet : Edited answer completely - hopefully that'll be more useful :)

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