Self bounded generics

Question

Is there is any actual difference between these this generic

public class SelfBounded <T extends SelfBounded<T>>{}

and this one

public class SelfBounded <T extends SelfBounded>{}

?

If yes, then how can I observe them?

The second one uses a raw type, that's probably not a good idea. — millimoose, Oct 25 '13 at 11:27
There's actually an example of something similar in the standard Java API: `public class Enum>` — Jesper, Oct 25 '13 at 11:52
This totally f**** my mind on a friday afternoon. Guess I can call it a day now. +1 for that. — André Stannek, Oct 25 '13 at 12:19
I have a proof, but it is too large to fit into this comment. — Sled, Oct 25 '13 at 12:19

score 4 · Answer 1 · edited May 23 '17 at 10:31

4

There are a lot of similar questions here already. You can read the following article

Or the following questions:

edited May 23 '17 at 10:31

Community

answered Oct 25 '13 at 12:14

masarov

None of those links directly addresses the difference between the standard self-bounded type `SelfBounded >` and the non-standard `SelfBounded `. In other words, is the raw typed version equivalent, or does it just look similar? – seanf Nov 30 '21 at 03:05

score -3 · Answer 2 · answered Oct 25 '13 at 22:46

-3

The second one uses a raw type, which should never be used.

But actually neither of these declarations are normally useful. You should almost certainly just use

public class SelfBounded <T>

answered Oct 25 '13 at 22:46

newacct

2 Answers2