About Question enthuware.ocpjp.ii.v11.2.3345 :

[marcoolivi]

How can a final variable be changed by a method? Does this have to do with the fact that the method setIn0() is labeled "native"?

[admin]

That's right. A native method executes low level code directly using OS service calls, bypassing the JVM. This allows it do stuff such as manipulating memory directly.