Shortest Hello World?

[Trinithis]

Removing excess whitespace, is this the shortest hello world program one can make in Java?

enum X {
  X;
  X() {
    System.out.print("Hello World!");
  }
}

Or without throwing an error:

enum X {
  X;
  X() {
    System.out.print("Hello World!");
    System.exit(0);
  }
}

Any thoughts? Just curious if anyone can devise a smaller version. (I came up with the enum version after seeing one using static initializers.)