What is the difference between uninitialized values for primitive types and Wrapper classes ?
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 Q1. What is the difference between uninitialized values for primitive types and Wrapper classes ? Core Java2017-08-24 21:40:30

Ans. When we create reference for primitive type, it's memory is allocated. So even if we don't assign any value to it, the default value is initialized.

int x; // default value 0 initialized

But for object references, it's different as references hold nothing till an object is assigned.

Object obj; // contains null

So all primitive types when declared , contains their respective default values on the basis of their type whereas all wrapper class References contains null irrespective of their types.

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