Search code examples
javaintegerboxingunboxing

Java boxing or unboxing

I found an example where I cannot find the number of boxing and unboxing in the Java code below :

Integer x = 5;
int y = x + x;

I would say that there is one type of unboxing (int y = x + x), but I am not sure about that. Is there any boxing as well?

Solution

  • There is one boxing in Integer x = 5. The int 5 is boxed to Integer.

    There are two un-boxings in int y = x + x: Integer x is unboxed twice.