return value of the Collections.addAll

[fatabass]

The method addAll is shown as:

public static <T> boolean addAll(Collection<? super T> c,
T... a)

in the API.

So it is a public and static method.

Returns a <T> which is some sort of Container...

What does boolean stand for after the <T> ?

[KevinWorkman]

That <T> is not a return value. Recommended reading: Generic Methods (The Java™ Tutorials > Bonus > Generics)

[eRaaaa]

Returns a <T> which is some sort of Container...

Thats wrong! Read the API Doc (and generic tutorials!)
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Collections (Java Platform SE 6)

true if the collection changed as a result of the call