Re: [Jython-users] jython-java inheritance problem

[Oti <oh...@ya...>]

[ Alex Greif ]
> I have problems to understand why the following does not wirk in
> jython:
> 
> >>> import java
> >>> class A(java.io.Serializable):pass
> ...
> >>> class B(java.util.HashMap):pass
> ...
> >>> class C(A,B):pass
> ...
> Traceback (innermost last):
>   File "<console>", line 1, in ?
> TypeError: no multiple inheritance for Java classes:
> org.python.proxies.__main__$B$1 and org.python.proxies.__main__$A$0
> 
> 
> C inherits only from one concrete java class (HashMap).
> Any help is appreciated.

Alex,

two things to mention: HashMap already implements Serializable.
And if you want to extend a java class and implement an interface, you
can do it like this:

  >>> from java.util import HashMap
  >>> from java.lang import Comparable
  >>> class A(HashMap, Comparable):
  ...  pass
  ... 
  >>> class B(A):
  ...  pass
  ... 
  >>> 

Best wishes,
Oti.