java继承内部类

public class A { 
class ClassA extends B.ClassB{ 
public ClassA(B b){ 
b.super(); 
} 
} 
} 

class B{ 
class ClassB{ 
public ClassB(){ 

} 
} 
} 

public class Sample {
      public class ABC{  
      }
}
下面是子类
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public class TTTT extends Sample {
      public class DDDDDDD extends Sample.ABC{
      }
}