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java Collection Syntax
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 "?" ?
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? 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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