2
2
.
.
6
6
.
.
7
7
E
E
n
n
u
u
m
m
e
e
r
r
a
a
t
t
o
o
r
r
I
I
n
n
f
f
o
o
Enumerato
rs
●
are used to
iterate
through
colle
ction of
ele
ments
●
are legacy/
depreca
ted
Clas
s which shou
ld
be
replace
d by It
erators
●
can't be instant
iated
but
only retur
ned
by other Co
llect
ion
C
lasses
like
Hashtab
les