Who can explain inner class to me?

Question

//InheritInner.java
//Inheriting an inner class
class WithInner
     class Inner{
          Inner()
          {System.out.println("Inner class");
     WithInner()
     {System.out.println("WithInner");}
public class InheritInner extends WithInner.Inner
     //!InheritInner(){}//Won't compile
     InheritInner(WithInner wi)
          wi.super();
     public static void main(String[] args)
          WithInner wi=new WithInner();
          InheritInner ii=new InheritInner(wi);
Who can explain this subclass constructor to me?
I appreciate your help!

Answer 1

Here's the class that in 'Thinking in Java'. For some reason, yours is completely different.
//: InheritInner.java
// Inheriting an inner class
class WithInner {
  class Inner {}
public class InheritInner
    extends WithInner.Inner {
  //! InheritInner() {} // Won't compile
  InheritInner(WithInner wi) {
    wi.super();
  public static void main(String[] args) {
    WithInner wi = new WithInner();
    InheritInner ii = new InheritInner(wi);