IMHO the term "multiple inheritance" in the java documentations should
be re written as "multiple inheritance  on a single level is not allowed
in java"

There is multiple  inheritance on various levels of the class  hierarchy
since we can say that the class C has both the properties of class A
and Class B
eg . Class B extends Class A
Class C extends Class B

Where else with respect to an example like
class B extends Class A, Class B
This represents multiple inheritance on a single level and this is not
allowed in java