在内部类中引用与外部类同包中另一个类的变量？java

这样就可以了啊
public class NeiBu
{
public static void main(String args[])
{
Outter outter=new Outter();
Outter.Inner inner=outter.new Inner();
inner.kk();
}
}
class Outter
{
Outter2 outter2=new Outter2();
class Inner
{
public void kk()
{
System.out.println(outter2.a);
}

}

}
class Outter2
{
int a=0;
}