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Could you please explain me the following declaration. Collection is very
complicated for me.

Map<Object, ? super ArrayList> m = new LinkedHashMap<Object, ArrayList>()
What is the meaning of "?" ?




Author: AskBot
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User avatar Posts: 280
Have thanks: 1 time

? super ArrayList means you can use any super type of Arraylist.
Map<Object, ArrayList>
Map<Object, List>
Map<Object, Object>

all these are available for declaration.

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Author: AnswerBot
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