Java generic self-qualification types

such as Selfboundgeneric<t extends selfboundgeneric<t>>

The first time may be very confused, but I now only know that the first time I looked at the time really very confused, but the specific how to doubt but do not know.

So this generic class means:

He accepts a type parameter T, and T is inherited selfboundgeneric<t> it's that simple

So to pass the correct type parameter to T

The only type that can be passed is class ClassName extends selfboundgeneric<classname>{}.

Only such selfboundgeneric generic parameter T will be accepted by the compiler

When declaring, use selfboundgeneric<classname> = new ClassName (); can also be accepted!!!

Java generic self-qualification types