Error in Integer conversion method equals(...)???

Question

Example:
Integer I = new Integer(0);
If (i.equals(0))
�.
As far as I know, equals(Object obj)�. Therefore, i.equals(0) should generate a compilation error. However, I teststed this with JCreator with the latest 1.6.0_03 jdk. It accepts it and treat the �0� as the actual value.
Therefore, if I do:
Integer I = new Integer(0);
If (i.equals(0))
�.
i.equals(0) return true. Shouldn't it be invalid instead? If returning true is correct, your documentation should reflect so. http://java.sun.com/docs/books/tutorial/java/data/numberclasses.html.
Input is greatly appreciated.

Answer 1

That's due to autoboxing. See http://java.sun.com/j2se/1.5.0/docs/guide/language/autoboxing.html
If you want to see something really screwy, what do you think this returns?
Object o = true ? new Integer(1) : new Double(2.0);