java - Generic method return super type of type param and method parameter type param -

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I want to type super the ultimate of the ultimate type of one type and the ultimate type of the ultimate one.

This compiled: 

  import java.util.List; Interface foo & lt; A & gt; {& Lt; R, B expanded R & gt; & Lt; R & gt; Example 1 (list & lt; B & gt; entity); & Lt; R & gt; & Lt; R & gt; Example 2 (list increments unit); }   
 But it does not apply that R must also be A's super. How do I do that?  
 Actually, I want to do something that is expressed in these:  
    
 But they do not compile.  
 It has two objectives:  
     
  1.  I want to be able to assign results to both A and B, to any super class.  
  2.  In the implementation of this method, I need a result type in which both A and B can be included, then the first examples compiling will not work because they will not keep A in the result.  
     
     
     I think you need to name the type parameter at the class level:  
      import java.util.List; Interface foo & lt; Base, one base and GT; {& Lt; B. expanded base & gt; & Lt; Base & gt; Example 1 (list & lt; B & gt; entity); & Lt; R & gt; & Lt; R & gt; Example 2 (list increments unit); }

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