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What is downcasting?
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I have an HashMap object, which has with key and value pair. It has 10 keys and values in that object. Now the question is I want insert new key and value in middle or any where in that list but not at the end or at the top. Is it possible or not. If yes how can we achieve this one?
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What is static variable and static method?
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what is mean by method signature?
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