obscuring is not this!?

class Foo {
    class a {

    }

    int x() {
        int a = 0;
        a obj = new a();
        System.out.println(obj.getClass());
        System.out.println(a); // 0
        return 0;
    }
}


public class MainClass {
    public static void main(String[] args) {
        new Foo().x();  // output: class qs.Foo$a
    }
}