Do anonymous classes *always* maintain a reference to their enclosing instance?

Question

I\'m working with some code where one object, \"foo\", is creating another object, \"bar\", and passing it a Callable. After this foo will return bar, and then

Answer 1

The static alternative (in this case) is not much larger (1 line):

public class Outer {
  static class InnerRunnable implements Runnable {
      public void run() {
        System.out.println("hello");
      }
    }
  public Runnable getRunnable() {
    return new InnerRunnable();
  }
}

BTW: if you use a Lambda in Java8 there will be no nested class generated. However I am not sure if the CallSite objects which get passed around in that case hold an reference to the outer instance (if not needed).