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Question: Why do we need wrappers like Integer, Boolean for int, boolean in Java

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Question: Why do we need wrappers like Integer, Boolean for int, boolean in Java?
Answer: Because wrappers let us treat primitives as objects. For example, you can not add an int to Vector, but you can the instance of Integer.
P.S. It is very short answer. If you know more please send us your
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Question: Why do we need wrappers like Integer, Boolean for int, boolean in Java