Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
If I have 4 distinct Java types (call them A B C D), and A is a subtype of B and A is a subtype of C and B is a subtype of D and C is a subtype of D, is this legal? Are there any examples out there?
Drawing the diagram:
D
| |
| |
B C
| |
| |
A
So D is the supertype.
Thanks!
This is not legal with inheritance, as Java as a language does not support multiple inheritance.
However you can do this by implementing multiple interfaces, which is a different thing from multiple inheritance.
So yes it’s possible and for you to do this so far as you can check if something is an instance of an interface but this is not the same as a class type, and your diagram would look a tad different to the one you have drawn.