java - sub class does acquire the interface implemented by the superclass? -


Just a little question that might be stupid but I have to make sure. If I get 2 classes: Classes and classesby have been declared in this way 

  Public class A utility ... // Usage is an interface clearly ... Public classes class A Expanding ... ...   
 Is Classbubble usable?  
 Edit and if the answer is yes, then I will write this declaration below  
  Public Class Enhancement Class A Useful   
 What will happen? Eclipse does not show me errors, but I have to know whether there will be any way   
 
 
  Public Classes Class A Appliances Applies To Usable  Bus is equal to  public classb class A expands . As you've already raised the  classes , which implements all the methods in your interface  usable , the eclipse wont show any error (compilation):  
  usable = new category (); Usable = new classbie ();

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