The index files produced by javadoc are still vulnerable to sort variations. For example:
if we have the following entities, will end up in a non-deterministic order:

a.A.length(boolean), a.D.length(int), and a.C.length

length(boolean) Method in a.B
length Field in a.C
length(int) Method in a.D

or sometimes
length(boolean) Method in a.B
length(int) Method in a.D
length Field in a.C

this is incorrect.