This week's giveaways are in the MongoDB and Jobs Discussion forums. We're giving away four copies of Mongo DB Applied Patterns and 4 resume reviews from Five Year Itch and have the authors/reps on-line! See this thread and this one for details.
How could it be possible ? What makes you think that it could possibly be ?
Wrapper classes, like java.lang.Integer can take advantage of auto-boxing to do such an assignment. Not classes other than wrapper classes.