Number Class in java, Boxing and un-boxing

Java Programming Language OOPs concept more (Article) OOPs concept more (Program)

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Program:

 public class NumberClass {

   public static void main(String args[]) {
      Integer n = 10; // boxes int to an Integer object
      n =  n + 10;   // unboxes the Integer to a int
      System.out.println(n);
   }
}

Output:

20
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