How to refer to enclosing anonymous class instance in Java?

问题

I'd like to know if it's possible (and how if it is) to refer to enclosing anonymous class instance in Java.

Example code:

final Handler handler = new Handler();

handler.post(new Runnable() {
    @Override
    public void run() {
        new Task() {
            @Override
            public void onTaskFinish() {
                handler.post(?); // what should go here?
            }
        }.execute()
    }
});

回答1:

If you were also a JavaScript coder, I bet you wouldn't need to ask this :) There is a trivial way to achieve what you want (and happens to be an important JavaScript idiom due to its peculiar semantics surrounding this).

handler.post(new Runnable() {
    @Override
    public void run() {
        final Runnable self = this;
        new Task() {
            @Override
            public void onTaskFinish() {
                handler.post(self);
            }
        }.execute()
    }
});

来源：https://stackoverflow.com/questions/28784624/how-to-refer-to-enclosing-anonymous-class-instance-in-java