Resources to learn JAVA

Hello /prog/ next semester I'm going to have an OOP class and we're going to use JAVA the "problem" is we'll have to learn JAVA by ourselves since the teacher will only explain OOP stuff and won actually teach us the language. The question is what are good resources to learn the language?

P.S. I don't know if it matters but i have some experience with C.

lel, I didn't even know Java had this kind of type inference..

[code]
class Collections {
  ...
  public static <T> T empyList() {
    return (List<T>) EMPTY_LIST;
  }
  ...
}

// Collections.<User>emptyList() not required here
List<User> users = Collections.emptyList();